fix(@ai-sdk/azure): Don't submit logprobs to azure if not specified

examples/ai-core/src/stream-text/azure-fullstream-logprobs.ts

@@ -0,0 +1,28 @@
+import { azure } from '@ai-sdk/azure';
+import { streamText } from 'ai';
+import dotenv from 'dotenv';
+
+dotenv.config();
+
+async function main() {
+  const result = await streamText({
+    model: azure('gpt-4o', { logprobs: true }),
+    prompt: 'Invent a new holiday and describe its traditions.',
+  });
+
+  for await (const part of result.fullStream) {
+    switch (part.type) {
+      case 'text-delta': {
+        console.log('Text delta:', part.textDelta);
+        break;
+      }
+
+      case 'finish': {
+        console.log(`finishReason: ${part.finishReason}`);
+        console.log('Logprobs:', part.logprobs); // object: { string, number, array}
+      }
+    }
+  }
+}
+
+main().catch(console.error);

packages/openai/src/openai-chat-language-model.test.ts

@@ -302,7 +302,7 @@ describe('doGenerate', () => {
     expect(await server.getRequestBodyJson()).toStrictEqual({
       model: 'gpt-3.5-turbo',
       messages: [{ role: 'user', content: 'Hello' }],
-      logprobs: true,
+      logprobs: 2,
       top_logprobs: 2,
       logit_bias: { 50256: -100 },
       parallel_tool_calls: false,

packages/openai/src/openai-chat-language-model.ts

@@ -74,8 +74,13 @@ export class OpenAIChatLanguageModel implements LanguageModelV1 {
       // model specific settings:
       logit_bias: this.settings.logitBias,
       logprobs:
-        this.settings.logprobs === true ||
-        typeof this.settings.logprobs === 'number',
+        this.settings.logprobs === undefined
+          ? false
+          : (this.settings.logprobs === this.settings.logprobs) === null ||
+            this.settings.logprobs === true ||
+            typeof this.settings.logprobs === 'number'
+          ? this.settings.logprobs
+          : false,
       top_logprobs:
         typeof this.settings.logprobs === 'number'
           ? this.settings.logprobs
@@ -146,6 +151,17 @@ export class OpenAIChatLanguageModel implements LanguageModelV1 {
   ): Promise<Awaited<ReturnType<LanguageModelV1['doGenerate']>>> {
     const args = this.getArgs(options);
 
+    // For azure, only include logprobs if it's defined. (#2024):
+    if (
+      this.config.compatibility === 'compatible' &&
+      this.provider === 'azure-openai.chat' &&
+      (args.logprobs === undefined || args.logprobs === false)
+    ) {
+      if ('logprobs' in args) {
+        delete (args as { logprobs?: boolean | number }).logprobs;
+      }
+    }
+
     const { responseHeaders, value: response } = await postJsonToApi({
       url: this.config.url({
         path: '/chat/completions',
@@ -189,6 +205,17 @@ export class OpenAIChatLanguageModel implements LanguageModelV1 {
   ): Promise<Awaited<ReturnType<LanguageModelV1['doStream']>>> {
     const args = this.getArgs(options);
 
+    // For azure, only include logprobs if it's defined. (#2024):
+    if (
+      this.config.compatibility === 'compatible' &&
+      this.provider === 'azure-openai.chat' &&
+      (args.logprobs === undefined || args.logprobs === false)
+    ) {
+      if ('logprobs' in args) {
+        delete (args as { logprobs?: boolean | number }).logprobs;
+      }
+    }
+
     const { responseHeaders, value: response } = await postJsonToApi({
       url: this.config.url({
         path: '/chat/completions',