Using Deepseek reasoner model results in error

[pangmaowang]

Description

I used the ai chatbot vercel holds, i added the deepseek r1 model..
I tried two ways
first is too use the wrapLanguageModel as it is...
it errored me out like

I got the error Error [AI_APICallError]: deepseek-reasoner does not support Function Calling
    at <unknown> (turbopack://[project]/node_modules/.pnpm/@ai-sdk+provider-utils@2.1.6_zod@3.23.8/node_modules/@ai-sdk/provider-utils/src/response-handler.ts:59:15)
    at async postToApi (turbopack://[project]/node_modules/.pnpm/@ai-sdk+provider-utils@2.1.6_zod@3.23.8/node_modules/@ai-sdk/provider-utils/src/post-to-api.ts:81:27)
    at async OpenAICompatibleChatLanguageModel.doStream (turbopack://[project]/node_modules/.pnpm/@ai-sdk+openai-compatible@0.1.8_zod@3.23.8/node_modules/@ai-sdk/openai-compatible/src/openai-compatible-chat-language-model.ts:346:49)
    at async fn (turbopack://[project]/node_modules/.pnpm/ai@4.1.21_react@19.0.0-rc-45804af1-20241021_zod@3.23.8/node_modules/ai/core/generate-text/stream-text.ts:925:24)
    at async (turbopack://[project]/node_modules/.pnpm/ai@4.1.21_react@19.0.0-rc-45804af1-20241021_zod@3.23.8/node_modules/ai/core/telemetry/record-span.ts:18:21)
    at async _retryWithExponentialBackoff (turbopack://[project]/node_modules/.pnpm/ai@4.1.21_react@19.0.0-rc-45804af1-20241021_zod@3.23.8/node_modules/ai/util/retry-with-exponential-backoff.ts:36:11)
    at async streamStep (turbopack://[project]/node_modules/.pnpm/ai@4.1.21_react@19.0.0-rc-45804af1-20241021_zod@3.23.8/node_modules/ai/core/generate-text/stream-text.ts:880:14)
    at async fn (turbopack://[project]/node_modules/.pnpm/ai@4.1.21_react@19.0.0-rc-45804af1-20241021_zod@3.23.8/node_modules/ai/core/generate-text/stream-text.ts:1306:8)
    at async (turbopack://[project]/node_modules/.pnpm/ai@4.1.21_react@19.0.0-rc-45804af1-20241021_zod@3.23.8/node_modules/ai/core/telemetry/record-span.ts:18:21)
  57 |       return {
  58 |         responseHeaders,
> 59 |         value: new APICallError({
     |               ^
  60 |           message: errorToMessage(parsedError),
  61 |           url,
  62 |           requestBodyValues, {

then i remove the wrapLanguageModel and use model directly..
the error is

I got the error Error [AI_APICallError]: deepseek-reasoner does not support successive user or assistant messages (messages[1] and messages[2] in your input). You should interleave the user/assistant messages in the message sequence.
    at <unknown> (turbopack://[project]/node_modules/.pnpm/@ai-sdk+provider-utils@2.1.6_zod@3.23.8/node_modules/@ai-sdk/provider-utils/src/response-handler.ts:59:15)
    at async postToApi (turbopack://[project]/node_modules/.pnpm/@ai-sdk+provider-utils@2.1.6_zod@3.23.8/node_modules/@ai-sdk/provider-utils/src/post-to-api.ts:81:27)
    at async OpenAICompatibleChatLanguageModel.doStream (turbopack://[project]/node_modules/.pnpm/@ai-sdk+openai-compatible@0.1.8_zod@3.23.8/node_modules/@ai-sdk/openai-compatible/src/openai-compatible-chat-language-model.ts:346:49)
    at async fn (turbopack://[project]/node_modules/.pnpm/ai@4.1.21_react@19.0.0-rc-45804af1-20241021_zod@3.23.8/node_modules/ai/core/generate-text/stream-text.ts:925:24)
    at async (turbopack://[project]/node_modules/.pnpm/ai@4.1.21_react@19.0.0-rc-45804af1-20241021_zod@3.23.8/node_modules/ai/core/telemetry/record-span.ts:18:21)
    at async _retryWithExponentialBackoff (turbopack://[project]/node_modules/.pnpm/ai@4.1.21_react@19.0.0-rc-45804af1-20241021_zod@3.23.8/node_modules/ai/util/retry-with-exponential-backoff.ts:36:11)
    at async streamStep (turbopack://[project]/node_modules/.pnpm/ai@4.1.21_react@19.0.0-rc-45804af1-20241021_zod@3.23.8/node_modules/ai/core/generate-text/stream-text.ts:880:14)
    at async fn (turbopack://[project]/node_modules/.pnpm/ai@4.1.21_react@19.0.0-rc-45804af1-20241021_zod@3.23.8/node_modules/ai/core/generate-text/stream-text.ts:1306:8)
    at async (turbopack://[project]/node_modules/.pnpm/ai@4.1.21_react@19.0.0-rc-45804af1-20241021_zod@3.23.8/node_modules/ai/core/telemetry/record-span.ts:18:21)
  57 |       return {
  58 |         responseHeaders,
> 59 |         value: new APICallError({
     |               ^
  60 |           message: errorToMessage(parsedError),
  61 |           url,
  62 |           requestBodyValues, {
  cause: undefined,
  url: 'https://api.deepseek.com/v1/chat/completions',
  requestBodyValues: [Object],
  statusCode: 400,
  responseHeaders: [Object],
  responseBody: '{"error":{"message":"deepseek-reasoner does not support successive user or assistant messages (messages[1] and messages[2] in your input). You should interleave the user/assistant messages in the message sequence.","type":"invalid_request_error","param":null,"code":"invalid_request_error"}}',
  isRetryable: false,
  data: [Object]
}

Code example

No response

AI provider

@ai-sdk/deepseek

Additional context

No response

[smoothdvd]

deepseek-reasoner does not support tool function (Function Call). Not Supported Features：Function Call、Json Output、FIM (Beta)

https://sdk.vercel.ai/docs/foundations/providers-and-models#model-capabilities needs to be correct.