diff --git a/src/engine.ts b/src/engine.ts
index ca03ceb..00f186a 100644
--- a/src/engine.ts
+++ b/src/engine.ts
@@ -457,6 +457,9 @@ export class QueryEngine {
     const context: ToolContext = {
       cwd: this.config.cwd,
       abortSignal: this.config.abortSignal,
+      provider: this.provider,
+      model: this.config.model,
+      apiType: this.provider.apiType,
     }
 
     const MAX_CONCURRENCY = parseInt(
diff --git a/src/tools/agent-tool.ts b/src/tools/agent-tool.ts
index fa96f62..b1d608c 100644
--- a/src/tools/agent-tool.ts
+++ b/src/tools/agent-tool.ts
@@ -101,13 +101,15 @@ export const AgentTool: ToolDefinition = {
     const systemPrompt = agentDef?.prompt ||
       'You are a helpful assistant. Complete the given task using the available tools.'
 
-    // Resolve model and create provider for subagent
-    const subModel = input.model || process.env.CODEANY_MODEL || 'claude-sonnet-4-6'
-    const apiType = (process.env.CODEANY_API_TYPE as ApiType) || 'anthropic-messages'
-    const provider = createProvider(apiType, {
-      apiKey: process.env.CODEANY_API_KEY,
-      baseURL: process.env.CODEANY_BASE_URL,
-    })
+    // Inherit provider and model from parent agent context, fall back to env vars
+    const subModel = input.model || context.model || process.env.CODEANY_MODEL || 'claude-sonnet-4-6'
+    const provider = context.provider ?? createProvider(
+      (context.apiType || process.env.CODEANY_API_TYPE as ApiType) || 'anthropic-messages',
+      {
+        apiKey: process.env.CODEANY_API_KEY,
+        baseURL: process.env.CODEANY_BASE_URL,
+      },
+    )
 
     // Create subagent engine
     const engine = new QueryEngine({
diff --git a/src/types.ts b/src/types.ts
index aafa38f..c5890b5 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -191,6 +191,12 @@ export interface ToolInputSchema {
 export interface ToolContext {
   cwd: string
   abortSignal?: AbortSignal
+  /** Parent agent's LLM provider (inherited by subagents) */
+  provider?: import('./providers/types.js').LLMProvider
+  /** Parent agent's model ID */
+  model?: string
+  /** Parent agent's API type */
+  apiType?: import('./providers/types.js').ApiType
 }
 
 export interface ToolResult {