feat: add per-message model and reasoning effort override

Allow users to select a different model and reasoning effort level
directly from the chat input toolbar, overriding the bot defaults
on a per-message basis. The backend accepts optional model_id and
reasoning_effort parameters via both WebSocket and HTTP APIs, with
request-level values taking priority over bot/session settings.

- Backend: extend wsClientMessage and LocalChannelMessageRequest with
  model_id/reasoning_effort fields; add ReasoningEffort to ChatRequest;
  update resolver to prioritize request-level reasoning effort
- Frontend: add ModelOptions and ReasoningEffortSelect shared components;
  refactor model-select to reuse ModelOptions; add model/reasoning
  selectors to chat input toolbar; initialize from bot settings
- Regenerate swagger spec and TypeScript SDK

apps/web/src/composables/api/useChat.message-api.ts

@@ -28,10 +28,16 @@ export async function fetchMessages(
   return (data as unknown as { items?: Message[] })?.items ?? []
 }
 
+export interface SendMessageOverrides {
+  modelId?: string
+  reasoningEffort?: string
+}
+
 export async function sendLocalChannelMessage(
   botId: string,
   text: string,
   attachments?: ChatAttachment[],
+  overrides?: SendMessageOverrides,
 ): Promise<void> {
   const msg: ChannelMessage = {}
   const trimmedText = text.trim()
@@ -46,9 +52,12 @@ export async function sendLocalChannelMessage(
       name: item.name ?? '',
     }))
   }
+  const body: Record<string, unknown> = { message: msg }
+  if (overrides?.modelId) body.model_id = overrides.modelId
+  if (overrides?.reasoningEffort) body.reasoning_effort = overrides.reasoningEffort
   await postBotsByBotIdWebMessages({
     path: { bot_id: botId },
-    body: { message: msg },
+    body: body as { message: ChannelMessage; model_id?: string; reasoning_effort?: string },
     throwOnError: true,
   })
 }

apps/web/src/composables/api/useChat.ws.ts

@@ -6,6 +6,8 @@ export interface WSClientMessage {
   text?: string
   session_id?: string
   attachments?: ChatAttachment[]
+  model_id?: string
+  reasoning_effort?: string
 }
 
 export interface ChatWebSocket {

apps/web/src/i18n/locales/en.json

@@ -166,6 +166,15 @@
     "toolSpawnCount": "{count} tasks",
     "unknownUser": "{platform} User",
     "files": "Files",
+    "modelOverride": "Model",
+    "modelDefault": "Default",
+    "reasoningEffort": "Reasoning",
+    "reasoningOff": "Off",
+    "reasoningNone": "None",
+    "reasoningLow": "Low",
+    "reasoningMedium": "Medium",
+    "reasoningHigh": "High",
+    "reasoningXHigh": "X-High",
     "sessions": "Sessions",
     "newSession": "New Session",
     "deleteSession": "Delete Session",

apps/web/src/i18n/locales/zh.json

@@ -162,6 +162,15 @@
     "toolSpawnCount": "{count} 个任务",
     "unknownUser": "{platform}用户",
     "files": "文件管理",
+    "modelOverride": "模型",
+    "modelDefault": "默认",
+    "reasoningEffort": "推理",
+    "reasoningOff": "关闭",
+    "reasoningNone": "无",
+    "reasoningLow": "低",
+    "reasoningMedium": "中",
+    "reasoningHigh": "高",
+    "reasoningXHigh": "极高",
     "sessions": "会话",
     "newSession": "新建会话",
     "deleteSession": "删除会话",

apps/web/src/pages/bots/components/bot-settings.vue

@@ -209,67 +209,40 @@
       />
     </div>
 
-    <!-- Reasoning (only if chat model supports it) -->
-    <template v-if="chatModelSupportsReasoning">
-      <Separator />
-      <div class="space-y-4">
-        <div class="flex items-center justify-between">
-          <Label>{{ $t('bots.settings.reasoningEnabled') }}</Label>
-          <Switch
-            :model-value="form.reasoning_enabled"
-            @update:model-value="(val) => form.reasoning_enabled = !!val"
-          />
-        </div>
-        <div
-          v-if="form.reasoning_enabled"
-          class="space-y-2"
-        >
-          <Label>{{ $t('bots.settings.reasoningEffort') }}</Label>
-          <Select
-            :model-value="form.reasoning_effort"
-            @update:model-value="(val) => form.reasoning_effort = val ?? 'medium'"
+    <!-- Reasoning -->
+    <Separator />
+    <div class="space-y-2">
+      <Label>{{ $t('bots.settings.reasoningEffort') }}</Label>
+      <Popover v-model:open="reasoningPopoverOpen">
+        <PopoverTrigger as-child>
+          <Button
+            variant="outline"
+            role="combobox"
+            :disabled="!chatModelSupportsReasoning"
+            class="w-full justify-between font-normal"
           >
-            <SelectTrigger>
-              <SelectValue />
-            </SelectTrigger>
-            <SelectContent>
-              <SelectGroup>
-                <SelectItem
-                  v-if="availableReasoningEfforts.includes('none')"
-                  value="none"
-                >
-                  {{ $t('bots.settings.reasoningEffortNone') }}
-                </SelectItem>
-                <SelectItem
-                  v-if="availableReasoningEfforts.includes('low')"
-                  value="low"
-                >
-                  {{ $t('bots.settings.reasoningEffortLow') }}
-                </SelectItem>
-                <SelectItem
-                  v-if="availableReasoningEfforts.includes('medium')"
-                  value="medium"
-                >
-                  {{ $t('bots.settings.reasoningEffortMedium') }}
-                </SelectItem>
-                <SelectItem
-                  v-if="availableReasoningEfforts.includes('high')"
-                  value="high"
-                >
-                  {{ $t('bots.settings.reasoningEffortHigh') }}
-                </SelectItem>
-                <SelectItem
-                  v-if="availableReasoningEfforts.includes('xhigh')"
-                  value="xhigh"
-                >
-                  {{ $t('bots.settings.reasoningEffortXHigh') }}
-                </SelectItem>
-              </SelectGroup>
-            </SelectContent>
-          </Select>
-        </div>
-      </div>
-    </template>
+            <span class="flex items-center gap-2">
+              <Lightbulb
+                class="size-3.5"
+                :style="{ opacity: EFFORT_OPACITY[reasoningFormValue] ?? 0.5 }"
+              />
+              {{ reasoningFormValue === 'off' ? $t('chat.reasoningOff') : $t(EFFORT_LABELS[reasoningFormValue] ?? reasoningFormValue) }}
+            </span>
+            <ChevronDown class="size-3.5 shrink-0 text-muted-foreground" />
+          </Button>
+        </PopoverTrigger>
+        <PopoverContent
+          class="w-[--reka-popover-trigger-width] p-0"
+          align="start"
+        >
+          <ReasoningEffortSelect
+            v-model="reasoningFormValue"
+            :efforts="availableReasoningEfforts"
+            @update:model-value="reasoningPopoverOpen = false"
+          />
+        </PopoverContent>
+      </Popover>
+    </div>
 
     <!-- Save -->
     <div class="flex justify-end">
@@ -321,23 +294,22 @@
 import {
   Label,
   Input,
-  Switch,
   Button,
   Separator,
   Spinner,
-  Select,
-  SelectContent,
-  SelectGroup,
-  SelectItem,
-  SelectTrigger,
-  SelectValue,
+  Popover,
+  PopoverTrigger,
+  PopoverContent,
 } from '@memohai/ui'
-import { reactive, computed, watch } from 'vue'
+import { Lightbulb, ChevronDown } from 'lucide-vue-next'
+import { reactive, computed, ref, watch } from 'vue'
 import { useRouter } from 'vue-router'
 import { toast } from 'vue-sonner'
 import { useI18n } from 'vue-i18n'
 import ConfirmPopover from '@/components/confirm-popover/index.vue'
 import ModelSelect from './model-select.vue'
+import ReasoningEffortSelect from './reasoning-effort-select.vue'
+import { EFFORT_LABELS, EFFORT_OPACITY } from './reasoning-effort'
 import SearchProviderSelect from './search-provider-select.vue'
 import MemoryProviderSelect from './memory-provider-select.vue'
 import TtsModelSelect from './tts-model-select.vue'
@@ -542,6 +514,20 @@ watch(availableReasoningEfforts, (efforts) => {
   }
 }, { immediate: true })
 
+const reasoningPopoverOpen = ref(false)
+
+const reasoningFormValue = computed({
+  get: () => form.reasoning_enabled ? form.reasoning_effort : 'off',
+  set: (v: string) => {
+    if (v === 'off') {
+      form.reasoning_enabled = false
+    } else {
+      form.reasoning_enabled = true
+      form.reasoning_effort = v
+    }
+  },
+})
+
 const { data: memoryStatusData, isLoading: isMemoryStatusLoading } = useQuery({
   key: () => ['bot-memory-status', botIdRef.value, persistedMemoryProviderID.value],
   query: async () => {

apps/web/src/pages/bots/components/model-options.vue

@@ -0,0 +1,162 @@
+<template>
+  <div class="flex items-center border-b px-3">
+    <Search
+      class="mr-2 size-3.5 shrink-0 text-muted-foreground"
+    />
+    <input
+      v-model="searchTerm"
+      :placeholder="$t('bots.settings.searchModel')"
+      aria-label="Search models"
+      class="flex h-10 w-full bg-transparent py-3 text-xs outline-none placeholder:text-muted-foreground"
+    >
+  </div>
+
+  <div
+    class="max-h-64 overflow-y-auto"
+    role="listbox"
+  >
+    <div
+      v-if="filteredGroups.length === 0"
+      class="py-6 text-center text-xs text-muted-foreground"
+    >
+      {{ $t('bots.settings.noModel') }}
+    </div>
+
+    <div
+      v-for="group in filteredGroups"
+      :key="group.key"
+      class="p-1"
+    >
+      <div
+        v-if="group.label"
+        class="px-2 py-1.5 text-xs font-medium text-muted-foreground"
+      >
+        {{ group.label }}
+      </div>
+
+      <button
+        v-for="option in group.items"
+        :key="option.value"
+        type="button"
+        role="option"
+        :aria-selected="modelValue === option.value"
+        class="relative flex w-full cursor-pointer items-center gap-2 rounded-md px-2 py-1.5 text-xs outline-none hover:bg-accent hover:text-accent-foreground"
+        :class="{ 'bg-accent': modelValue === option.value }"
+        @click="$emit('update:modelValue', option.value)"
+      >
+        <Check
+          v-if="modelValue === option.value"
+          class="size-3.5 shrink-0"
+        />
+        <span
+          v-else
+          class="size-3.5 shrink-0"
+        />
+        <span class="truncate">{{ option.label }}</span>
+        <span class="ml-auto flex items-center gap-1.5">
+          <ModelCapabilities
+            v-if="option.compatibilities?.length"
+            :compatibilities="option.compatibilities"
+          />
+          <ContextWindowBadge :context-window="option.contextWindow" />
+          <span
+            v-if="option.description"
+            class="text-xs text-muted-foreground"
+          >
+            {{ option.description }}
+          </span>
+        </span>
+      </button>
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { computed, ref, watch } from 'vue'
+import { Search, Check } from 'lucide-vue-next'
+import type { ModelsGetResponse, ProvidersGetResponse } from '@memohai/sdk'
+import ModelCapabilities from '@/components/model-capabilities/index.vue'
+import ContextWindowBadge from '@/components/context-window-badge/index.vue'
+
+export interface ModelOption {
+  value: string
+  label: string
+  description?: string
+  groupKey: string
+  groupLabel: string
+  keywords: string[]
+  compatibilities?: string[]
+  contextWindow?: number
+}
+
+const props = defineProps<{
+  models: ModelsGetResponse[]
+  providers: ProvidersGetResponse[]
+  modelType: 'chat' | 'embedding'
+  open?: boolean
+}>()
+
+defineEmits<{
+  'update:modelValue': [value: string]
+}>()
+
+const modelValue = defineModel<string>({ default: '' })
+
+const searchTerm = ref('')
+
+watch(() => props.open, (v) => {
+  if (v) searchTerm.value = ''
+})
+
+const providerMap = computed(() => {
+  const map = new Map<string, string>()
+  for (const p of props.providers) {
+    if (p.id) map.set(p.id, p.name ?? p.id)
+  }
+  return map
+})
+
+const typeFilteredModels = computed(() =>
+  props.models.filter((m) => m.type === props.modelType),
+)
+
+const options = computed<ModelOption[]>(() =>
+  typeFilteredModels.value.map((model) => {
+    const providerId = model.llm_provider_id ?? ''
+    const config = model.config as { compatibilities?: string[]; context_window?: number } | undefined
+    return {
+      value: model.id || model.model_id || '',
+      label: model.name || model.model_id || '',
+      description: model.name ? model.model_id : undefined,
+      groupKey: providerId,
+      groupLabel: providerMap.value.get(providerId) ?? providerId,
+      keywords: [model.model_id ?? '', model.name ?? ''],
+      compatibilities: config?.compatibilities,
+      contextWindow: config?.context_window,
+    }
+  }),
+)
+
+const filteredOptions = computed(() => {
+  const keyword = searchTerm.value.trim().toLowerCase()
+  if (!keyword) return options.value
+  return options.value.filter((opt) => {
+    const terms = [opt.label, opt.description, ...opt.keywords]
+      .filter((t): t is string => Boolean(t))
+      .join(' ')
+      .toLowerCase()
+    return terms.includes(keyword)
+  })
+})
+
+const filteredGroups = computed(() => {
+  const groups = new Map<string, { key: string; label: string; items: ModelOption[] }>()
+  for (const opt of filteredOptions.value) {
+    if (!groups.has(opt.groupKey)) {
+      groups.set(opt.groupKey, { key: opt.groupKey, label: opt.groupLabel, items: [] })
+    }
+    groups.get(opt.groupKey)!.items.push(opt)
+  }
+  return Array.from(groups.values())
+})
+</script>

apps/web/src/pages/bots/components/model-select.vue

@@ -1,38 +1,42 @@
 <template>
-  <SearchableSelectPopover
-    v-model="selected"
-    :options="options"
-    :placeholder="placeholder || ''"
-    :aria-label="placeholder || 'Select model'"
-    :search-placeholder="$t('bots.settings.searchModel')"
-    search-aria-label="Search models"
-    :empty-text="$t('bots.settings.noModel')"
-  >
-    <template #option-suffix="{ option }">
-      <span class="ml-auto flex items-center gap-1.5">
-        <ModelCapabilities
-          v-if="optionMeta(option)?.compatibilities?.length"
-          :compatibilities="optionMeta(option)!.compatibilities!"
-        />
-        <ContextWindowBadge :context-window="optionMeta(option)?.context_window" />
-        <span
-          v-if="option.description"
-          class="text-xs text-muted-foreground"
-        >
-          {{ option.description }}
+  <Popover v-model:open="open">
+    <PopoverTrigger as-child>
+      <Button
+        variant="outline"
+        role="combobox"
+        :aria-expanded="open"
+        :aria-label="placeholder || 'Select model'"
+        class="w-full justify-between font-normal"
+      >
+        <span class="truncate">
+          {{ displayLabel || placeholder }}
         </span>
-      </span>
-    </template>
-  </SearchableSelectPopover>
+        <Search
+          class="ml-2 size-3.5 shrink-0 text-muted-foreground"
+        />
+      </Button>
+    </PopoverTrigger>
+    <PopoverContent
+      class="w-[--reka-popover-trigger-width] p-0"
+      align="start"
+    >
+      <ModelOptions
+        v-model="selected"
+        :models="models"
+        :providers="providers"
+        :model-type="modelType"
+        :open="open"
+      />
+    </PopoverContent>
+  </Popover>
 </template>
 
 <script setup lang="ts">
-import { computed } from 'vue'
-import type { ModelsGetResponse, ModelsModelConfig, ProvidersGetResponse } from '@memohai/sdk'
-import SearchableSelectPopover from '@/components/searchable-select-popover/index.vue'
-import type { SearchableSelectOption } from '@/components/searchable-select-popover/index.vue'
-import ModelCapabilities from '@/components/model-capabilities/index.vue'
-import ContextWindowBadge from '@/components/context-window-badge/index.vue'
+import { computed, ref, watch } from 'vue'
+import { Search } from 'lucide-vue-next'
+import { Popover, PopoverTrigger, PopoverContent, Button } from '@memohai/ui'
+import type { ModelsGetResponse, ProvidersGetResponse } from '@memohai/sdk'
+import ModelOptions from './model-options.vue'
 
 const props = defineProps<{
   models: ModelsGetResponse[]
@@ -42,35 +46,14 @@ const props = defineProps<{
 }>()
 
 const selected = defineModel<string>({ default: '' })
+const open = ref(false)
 
-const typeFilteredModels = computed(() =>
-  props.models.filter((m) => m.type === props.modelType),
-)
-
-const providerMap = computed(() => {
-  const map = new Map<string, string>()
-  for (const p of props.providers) {
-    map.set(p.id, p.name ?? p.id)
-  }
-  return map
+watch(selected, () => {
+  open.value = false
 })
 
-function optionMeta(option: SearchableSelectOption): ModelsModelConfig | undefined {
-  return option.meta as ModelsModelConfig | undefined
-}
-
-const options = computed<SearchableSelectOption[]>(() =>
-  typeFilteredModels.value.map((model) => {
-    const providerId = model.llm_provider_id
-    return {
-      value: model.id || model.model_id,
-      label: model.name || model.model_id,
-      description: model.name ? model.model_id : undefined,
-      group: providerId,
-      groupLabel: providerMap.value.get(providerId) ?? providerId,
-      keywords: [model.model_id, model.name ?? ''],
-      meta: model.config,
-    }
-  }),
-)
+const displayLabel = computed(() => {
+  const model = props.models.find((m) => (m.id || m.model_id) === selected.value)
+  return model?.name || model?.model_id || selected.value
+})
 </script>

apps/web/src/pages/bots/components/reasoning-effort-select.vue

@@ -0,0 +1,49 @@
+<template>
+  <div
+    class="flex flex-col gap-0.5 p-1"
+    role="listbox"
+  >
+    <button
+      type="button"
+      role="option"
+      :aria-selected="modelValue === 'off'"
+      class="flex w-full items-center gap-2 rounded-md px-2 py-1.5 text-xs hover:bg-accent hover:text-accent-foreground"
+      :class="{ 'bg-accent': modelValue === 'off' }"
+      @click="$emit('update:modelValue', 'off')"
+    >
+      <Lightbulb class="size-3.5 shrink-0 opacity-10" />
+      {{ $t('chat.reasoningOff') }}
+    </button>
+    <button
+      v-for="effort in efforts"
+      :key="effort"
+      type="button"
+      role="option"
+      :aria-selected="modelValue === effort"
+      class="flex w-full items-center gap-2 rounded-md px-2 py-1.5 text-xs hover:bg-accent hover:text-accent-foreground"
+      :class="{ 'bg-accent': modelValue === effort }"
+      @click="$emit('update:modelValue', effort)"
+    >
+      <Lightbulb
+        class="size-3.5 shrink-0"
+        :style="{ opacity: EFFORT_OPACITY[effort] ?? 0.5 }"
+      />
+      {{ $t(EFFORT_LABELS[effort] ?? effort) }}
+    </button>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { Lightbulb } from 'lucide-vue-next'
+import { EFFORT_LABELS, EFFORT_OPACITY } from './reasoning-effort'
+
+defineProps<{
+  efforts: string[]
+}>()
+
+defineEmits<{
+  'update:modelValue': [value: string]
+}>()
+
+const modelValue = defineModel<string>({ default: '' })
+</script>

apps/web/src/pages/bots/components/reasoning-effort.ts

@@ -0,0 +1,16 @@
+export const EFFORT_LABELS: Record<string, string> = {
+  none: 'chat.reasoningNone',
+  low: 'chat.reasoningLow',
+  medium: 'chat.reasoningMedium',
+  high: 'chat.reasoningHigh',
+  xhigh: 'chat.reasoningXHigh',
+}
+
+export const EFFORT_OPACITY: Record<string, number> = {
+  off: 0.1,
+  none: 0.15,
+  low: 0.35,
+  medium: 0.6,
+  high: 0.85,
+  xhigh: 1,
+}

apps/web/src/pages/home/components/chat-area.vue

@@ -141,6 +141,65 @@
                   align="block-end"
                   class="items-center py-1.5"
                 >
+                  <!-- Model override selector -->
+                  <Popover v-model:open="modelPopoverOpen">
+                    <PopoverTrigger as-child>
+                      <Button
+                        type="button"
+                        size="sm"
+                        variant="ghost"
+                        :disabled="!currentBotId || activeChatReadOnly"
+                        class="gap-0.5 text-muted-foreground max-w-40"
+                      >
+                        <span class="truncate text-[11px]">{{ selectedModelLabel }}</span>
+                        <ChevronDown class="size-3 shrink-0 opacity-50" />
+                      </Button>
+                    </PopoverTrigger>
+                    <PopoverContent
+                      class="w-96 p-0"
+                      align="start"
+                    >
+                      <ModelOptions
+                        v-model="overrideModelId"
+                        :models="models"
+                        :providers="providers"
+                        model-type="chat"
+                        :open="modelPopoverOpen"
+                        @update:model-value="onModelSelected"
+                      />
+                    </PopoverContent>
+                  </Popover>
+
+                  <!-- Reasoning effort selector -->
+                  <Popover v-model:open="reasoningPopoverOpen">
+                    <PopoverTrigger as-child>
+                      <Button
+                        type="button"
+                        size="sm"
+                        variant="ghost"
+                        :disabled="!currentBotId || activeChatReadOnly || !activeModelSupportsReasoning"
+                        class="gap-0.5 text-muted-foreground"
+                      >
+                        <Lightbulb
+                          class="size-3.5 shrink-0"
+                          :style="{ opacity: reasoningTriggerOpacity }"
+                        />
+                        <span class="text-[11px]">{{ selectedReasoningLabel }}</span>
+                        <ChevronDown class="size-3 shrink-0 opacity-50" />
+                      </Button>
+                    </PopoverTrigger>
+                    <PopoverContent
+                      class="w-40 p-0"
+                      align="start"
+                    >
+                      <ReasoningEffortSelect
+                        v-model="overrideReasoningEffort"
+                        :efforts="availableReasoningEfforts"
+                        @update:model-value="onReasoningSelected"
+                      />
+                    </PopoverContent>
+                  </Popover>
+
                   <Button
                     type="button"
                     size="sm"
@@ -242,25 +301,35 @@
 </template>
 
 <script setup lang="ts">
-import { ref, computed, nextTick, onMounted, onBeforeUnmount, provide, useTemplateRef, watchEffect } from 'vue'
+import { ref, computed, nextTick, onMounted, onBeforeUnmount, provide, useTemplateRef, watchEffect, watch } from 'vue'
 import { useLocalStorage } from '@vueuse/core'
-import { LoaderCircle, Image as ImageIcon, File as FileIcon, X, Paperclip, FolderOpen, Send } from 'lucide-vue-next'
-import { ScrollArea, Button, InputGroup, InputGroupAddon, InputGroupTextarea } from '@memohai/ui'
+import { LoaderCircle, Image as ImageIcon, File as FileIcon, X, Paperclip, FolderOpen, Send, ChevronDown, Lightbulb } from 'lucide-vue-next'
+import { ScrollArea, Button, InputGroup, InputGroupAddon, InputGroupTextarea, Popover, PopoverContent, PopoverTrigger } from '@memohai/ui'
 import { useChatStore } from '@/store/chat-list'
 import { storeToRefs } from 'pinia'
 import MessageItem from './message-item.vue'
 import MediaGalleryLightbox from './media-gallery-lightbox.vue'
 import FileManager from '@/components/file-manager/index.vue'
+import ModelOptions from '@/pages/bots/components/model-options.vue'
+import ReasoningEffortSelect from '@/pages/bots/components/reasoning-effort-select.vue'
+import { EFFORT_LABELS, EFFORT_OPACITY } from '@/pages/bots/components/reasoning-effort'
 import { useMediaGallery } from '../composables/useMediaGallery'
 import { openInFileManagerKey } from '../composables/useFileManagerProvider'
 import type { ChatAttachment } from '@/composables/api/useChat'
 import { useScroll, useElementBounding } from '@vueuse/core'
+import { useQuery } from '@pinia/colada'
+import { getModels, getProviders, getBotsByBotIdSettings } from '@memohai/sdk'
+import type { ModelsGetResponse, ProvidersGetResponse } from '@memohai/sdk'
+import { useI18n } from 'vue-i18n'
 
+const { t } = useI18n()
 const chatStore = useChatStore()
 const fileInput = ref<HTMLInputElement | null>(null)
 const pendingFiles = ref<File[]>([])
 const fileManagerOpen = ref(false)
 const fileManagerRef = ref<InstanceType<typeof FileManager> | null>(null)
+const modelPopoverOpen = ref(false)
+const reasoningPopoverOpen = ref(false)
 
 const FM_MIN_WIDTH = 320
 const FM_MAX_WIDTH = 800
@@ -334,8 +403,104 @@ const {
   loadingOlder,
   loadingChats,
   hasMoreOlder,
+  overrideModelId,
+  overrideReasoningEffort,
 } = storeToRefs(chatStore)
 
+const { data: modelData } = useQuery({
+  key: ['all-models'],
+  query: async () => {
+    const { data } = await getModels({ throwOnError: true })
+    return data
+  },
+})
+
+const { data: providerData } = useQuery({
+  key: ['all-providers'],
+  query: async () => {
+    const { data } = await getProviders({ throwOnError: true })
+    return data
+  },
+})
+
+const { data: botSettings } = useQuery({
+  key: () => ['bot-settings', currentBotId.value],
+  query: async () => {
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any
+    const { data } = await (getBotsByBotIdSettings as any)({
+      path: { bot_id: currentBotId.value! },
+      throwOnError: true,
+    })
+    return data as import('@memohai/sdk').SettingsSettings | undefined
+  },
+  enabled: () => !!currentBotId.value,
+})
+
+const models = computed<ModelsGetResponse[]>(() => modelData.value ?? [])
+const providers = computed<ProvidersGetResponse[]>(() => providerData.value ?? [])
+
+const activeModel = computed(() => {
+  const id = overrideModelId.value || botSettings.value?.chat_model_id || ''
+  return models.value.find((m) => m.id === id)
+})
+
+const activeModelSupportsReasoning = computed(() =>
+  !!activeModel.value?.config?.compatibilities?.includes('reasoning'),
+)
+
+const availableReasoningEfforts = computed(() => {
+  const efforts = ((activeModel.value?.config as { reasoning_efforts?: string[] } | undefined)?.reasoning_efforts ?? [])
+    .filter((e) => ['none', 'low', 'medium', 'high', 'xhigh'].includes(e))
+  return efforts.length > 0 ? efforts : ['low', 'medium', 'high']
+})
+
+const selectedModelLabel = computed(() => {
+  const m = models.value.find((m) => m.id === overrideModelId.value)
+  return m?.name || m?.model_id || t('chat.modelDefault')
+})
+
+const selectedReasoningLabel = computed(() => {
+  const v = overrideReasoningEffort.value
+  if (v === 'off') return t('chat.reasoningOff')
+  return t(EFFORT_LABELS[v] ?? 'chat.modelDefault')
+})
+
+const reasoningTriggerOpacity = computed(() =>
+  EFFORT_OPACITY[overrideReasoningEffort.value] ?? 0.5,
+)
+
+function initFromBotSettings() {
+  if (!botSettings.value) return
+  if (!overrideModelId.value) {
+    overrideModelId.value = botSettings.value.chat_model_id ?? ''
+  }
+  if (!overrideReasoningEffort.value) {
+    if (botSettings.value.reasoning_enabled && botSettings.value.reasoning_effort) {
+      overrideReasoningEffort.value = botSettings.value.reasoning_effort
+    } else {
+      overrideReasoningEffort.value = 'off'
+    }
+  }
+}
+
+watch(botSettings, () => initFromBotSettings(), { immediate: true })
+
+watch(currentBotId, () => {
+  overrideModelId.value = ''
+  overrideReasoningEffort.value = ''
+})
+
+function onModelSelected() {
+  modelPopoverOpen.value = false
+  if (!activeModelSupportsReasoning.value) {
+    overrideReasoningEffort.value = 'off'
+  }
+}
+
+function onReasoningSelected() {
+  reasoningPopoverOpen.value = false
+}
+
 const {
   items: galleryItems,
   openIndex: galleryOpenIndex,

apps/web/src/store/chat-list.ts

@@ -106,9 +106,9 @@ export const useChatStore = defineStore('chat', () => {
   const hasMoreOlder = ref(true)
   const initializing = ref(false)
   const bots = ref<Bot[]>([])
+  const overrideModelId = ref<string>('')
+  const overrideReasoningEffort = ref<string>('')
 
-
- 
   let abortFn: (() => void) | null = null
   let messageEventsSince = ''
   let pendingAssistantStream: PendingAssistantStream | null = null
@@ -867,10 +867,13 @@ export const useChatStore = defineStore('chat', () => {
         rejectPendingAssistantStream(abortError)
       }
 
+      const modelId = overrideModelId.value || undefined
+      const re = overrideReasoningEffort.value
+      const reasoningEffort = (re && re !== 'off') ? re : undefined
       if (activeWs?.connected) {
-        activeWs.send({ type: 'message', text: trimmed, session_id: sid, attachments })
+        activeWs.send({ type: 'message', text: trimmed, session_id: sid, attachments, model_id: modelId, reasoning_effort: reasoningEffort })
       } else {
-        await sendLocalChannelMessage(bid, trimmed, attachments)
+        await sendLocalChannelMessage(bid, trimmed, attachments, { modelId, reasoningEffort })
       }
       await completion
 
@@ -927,6 +930,8 @@ export const useChatStore = defineStore('chat', () => {
     loadingOlder,
     hasMoreOlder,
     initializing,
+    overrideModelId,
+    overrideReasoningEffort,
     initialize,
     selectBot,
     selectSession,

internal/channel/inbound/channel.go

@@ -516,7 +516,7 @@ func (p *ChannelInboundProcessor) HandleInbound(ctx context.Context, cfg channel
 		return result
 	}
 
-	chunkCh, streamErrCh := p.runner.StreamChat(ctx, conversation.ChatRequest{
+	chatReq := conversation.ChatRequest{
 		BotID:                   identity.BotID,
 		ChatID:                  activeChatID,
 		SessionID:               sessionID,
@@ -536,7 +536,14 @@ func (p *ChannelInboundProcessor) HandleInbound(ctx context.Context, cfg channel
 		UserMessagePersisted:    false,
 		Attachments:             attachments,
 		OutboundAssetCollector:  assetCollector,
-	})
+	}
+	if mid, _ := msg.Metadata["model_id"].(string); strings.TrimSpace(mid) != "" {
+		chatReq.Model = strings.TrimSpace(mid)
+	}
+	if re, _ := msg.Metadata["reasoning_effort"].(string); strings.TrimSpace(re) != "" {
+		chatReq.ReasoningEffort = strings.TrimSpace(re)
+	}
+	chunkCh, streamErrCh := p.runner.StreamChat(ctx, chatReq)
 
 	var (
 		finalMessages []conversation.ModelMessage

internal/conversation/flow/resolver.go

@@ -234,8 +234,12 @@ func (r *Resolver) resolve(ctx context.Context, req conversation.ChatRequest) (r
 	inlineImages := extractNativeImageParts(mergedAttachments)
 
 	reasoningEffort := ""
-	if chatModel.HasCompatibility(models.CompatReasoning) && botSettings.ReasoningEnabled {
-		reasoningEffort = botSettings.ReasoningEffort
+	if chatModel.HasCompatibility(models.CompatReasoning) {
+		if re := strings.TrimSpace(req.ReasoningEffort); re != "" {
+			reasoningEffort = re
+		} else if botSettings.ReasoningEnabled {
+			reasoningEffort = botSettings.ReasoningEffort
+		}
 	}
 
 	var reasoningConfig *models.ReasoningConfig

internal/conversation/types.go

@@ -241,13 +241,14 @@ type ChatRequest struct {
 	// Set by the inbound channel processor; called by the resolver at persist time.
 	OutboundAssetCollector func() []OutboundAssetRef `json:"-"`
 
-	Query          string           `json:"query"`
-	Model          string           `json:"model,omitempty"`
-	Provider       string           `json:"provider,omitempty"`
-	Channels       []string         `json:"channels,omitempty"`
-	CurrentChannel string           `json:"current_channel,omitempty"`
-	Messages       []ModelMessage   `json:"messages,omitempty"`
-	Attachments    []ChatAttachment `json:"attachments,omitempty"`
+	Query           string           `json:"query"`
+	Model           string           `json:"model,omitempty"`
+	Provider        string           `json:"provider,omitempty"`
+	ReasoningEffort string           `json:"reasoning_effort,omitempty"`
+	Channels        []string         `json:"channels,omitempty"`
+	CurrentChannel  string           `json:"current_channel,omitempty"`
+	Messages        []ModelMessage   `json:"messages,omitempty"`
+	Attachments     []ChatAttachment `json:"attachments,omitempty"`
 }
 
 // ChatResponse is the output of a non-streaming chat call.

internal/handlers/local_channel.go

@@ -168,7 +168,9 @@ func formatLocalStreamEvent(event channel.StreamEvent) ([]byte, error) {
 
 // LocalChannelMessageRequest is the request body for posting a local channel message.
 type LocalChannelMessageRequest struct {
-	Message channel.Message `json:"message"`
+	Message         channel.Message `json:"message"`
+	ModelID         string          `json:"model_id,omitempty"`
+	ReasoningEffort string          `json:"reasoning_effort,omitempty"`
 }
 
 // PostMessage godoc
@@ -234,6 +236,18 @@ func (h *LocalChannelHandler) PostMessage(c echo.Context) error {
 		ReceivedAt: time.Now().UTC(),
 		Source:     "local",
 	}
+	if mid := strings.TrimSpace(req.ModelID); mid != "" {
+		if msg.Metadata == nil {
+			msg.Metadata = make(map[string]any)
+		}
+		msg.Metadata["model_id"] = mid
+	}
+	if re := strings.TrimSpace(req.ReasoningEffort); re != "" {
+		if msg.Metadata == nil {
+			msg.Metadata = make(map[string]any)
+		}
+		msg.Metadata["reasoning_effort"] = re
+	}
 	if err := h.channelManager.HandleInbound(c.Request().Context(), cfg, msg); err != nil {
 		return echo.NewHTTPError(http.StatusInternalServerError, err.Error())
 	}
@@ -245,10 +259,12 @@ var wsUpgrader = websocket.Upgrader{
 }
 
 type wsClientMessage struct {
-	Type        string            `json:"type"`
-	Text        string            `json:"text,omitempty"`
-	SessionID   string            `json:"session_id,omitempty"`
-	Attachments []json.RawMessage `json:"attachments,omitempty"`
+	Type            string            `json:"type"`
+	Text            string            `json:"text,omitempty"`
+	SessionID       string            `json:"session_id,omitempty"`
+	Attachments     []json.RawMessage `json:"attachments,omitempty"`
+	ModelID         string            `json:"model_id,omitempty"`
+	ReasoningEffort string            `json:"reasoning_effort,omitempty"`
 }
 
 // wsWriter serialises all WebSocket writes through a single goroutine to
@@ -419,6 +435,8 @@ func (h *LocalChannelHandler) HandleWebSocket(c echo.Context) error {
 					CurrentChannel:          h.channelType.String(),
 					Channels:                []string{h.channelType.String()},
 					Attachments:             chatAttachments,
+					Model:                   strings.TrimSpace(msg.ModelID),
+					ReasoningEffort:         strings.TrimSpace(msg.ReasoningEffort),
 				}
 				if streamErr := h.resolver.StreamChatWS(streamCtx, req, eventCh, abortCh); streamErr != nil {
 					if ctx.Err() == nil {

packages/sdk/src/types.gen.ts

@@ -835,6 +835,8 @@ export type HandlersListSnapshotsResponse = {
 
 export type HandlersLocalChannelMessageRequest = {
     message?: ChannelMessage;
+    model_id?: string;
+    reasoning_effort?: string;
 };
 
 export type HandlersLoginRequest = {

spec/docs.go

@@ -10855,6 +10855,12 @@ const docTemplate = `{
             "properties": {
                 "message": {
                     "$ref": "#/definitions/channel.Message"
+                },
+                "model_id": {
+                    "type": "string"
+                },
+                "reasoning_effort": {
+                    "type": "string"
                 }
             }
         },

spec/swagger.json

@@ -10846,6 +10846,12 @@
             "properties": {
                 "message": {
                     "$ref": "#/definitions/channel.Message"
+                },
+                "model_id": {
+                    "type": "string"
+                },
+                "reasoning_effort": {
+                    "type": "string"
                 }
             }
         },

spec/swagger.yaml

@@ -1375,6 +1375,10 @@ definitions:
     properties:
       message:
         $ref: '#/definitions/channel.Message'
+      model_id:
+        type: string
+      reasoning_effort:
+        type: string
     type: object
   handlers.LoginRequest:
     properties: