⛷

src/llms/chat.ts

@@ -62,6 +62,12 @@ export abstract class BaseChatModel<
   }
 
   tools(tools: BaseTask<any, any>[]): this {
+    if (!this.supportsTools) {
+      throw new Error(
+        `This Chat model "${this.nameForHuman}" does not support tools`
+      )
+    }
+
     this._tools = tools
     return this
   }
@@ -70,6 +76,10 @@ export abstract class BaseChatModel<
     messages: types.ChatMessage[]
   ): Promise<types.BaseChatCompletionResponse<TChatCompletionResponse>>
 
+  public get supportsTools(): boolean {
+    return false
+  }
+
   public async buildMessages(
     input?: TInput,
     ctx?: types.TaskCallContext<TInput>

src/llms/openai.ts

@@ -5,6 +5,13 @@ import { DEFAULT_OPENAI_MODEL } from '@/constants'
 
 import { BaseChatModel } from './chat'
 
+const openaiModelsSupportingFunctions = new Set([
+  'gpt-4-0613',
+  'gpt-4-32k-0613',
+  'gpt-3.5-turbo-0613',
+  'gpt-3.5-turbo-16k'
+])
+
 export class OpenAIChatModel<
   TInput = any,
   TOutput = string
@@ -23,9 +30,10 @@ export class OpenAIChatModel<
       SetOptional<Omit<types.openai.ChatCompletionParams, 'messages'>, 'model'>
     >
   ) {
+    const model = options.modelParams?.model || DEFAULT_OPENAI_MODEL
     super({
       provider: 'openai',
-      model: options.modelParams?.model || DEFAULT_OPENAI_MODEL,
+      model,
       ...options
     })
 
@@ -36,6 +44,20 @@ export class OpenAIChatModel<
         'OpenAIChatModel requires an OpenAI client to be configured on the Agentic runtime'
       )
     }
+
+    if (!this.supportsTools) {
+      if (this._tools) {
+        throw new Error(
+          `This OpenAI chat model "${this.nameForHuman}" does not support tools`
+        )
+      }
+
+      if (this._modelParams?.functions) {
+        throw new Error(
+          `This OpenAI chat model "${this.nameForHuman}" does not support functions`
+        )
+      }
+    }
   }
 
   public override get nameForModel(): string {
@@ -46,6 +68,10 @@ export class OpenAIChatModel<
     return 'OpenAIChatModel'
   }
 
+  public override get supportsTools(): boolean {
+    return openaiModelsSupportingFunctions.has(this._model)
+  }
+
   protected override async _createChatCompletion(
     messages: types.ChatMessage[]
   ): Promise<

test/services/openai.test.ts

@@ -8,6 +8,7 @@ test('OpenAIClient - createChatCompletion - functions', async (t) => {
   const openai = createOpenAITestClient()
 
   const model = 'gpt-3.5-turbo-0613'
+  // const model = 'gpt-3.5-turbo-16k'
   const messages: types.ChatMessage[] = [
     {
       role: 'user',
@@ -47,7 +48,8 @@ test('OpenAIClient - createChatCompletion - functions', async (t) => {
   t.is(res0.message.function_call!.name, 'get_current_weather')
 
   const args = JSON.parse(res0.message.function_call!.arguments)
-  t.deepEqual(args, { location: 'Boston' })
+  t.is(typeof args.location, 'string')
+  t.true(args.location.toLowerCase().includes('boston'))
 
   const weatherMock = { temperature: 22, unit: 'celsius', description: 'Sunny' }