Gemini: AI_UnsupportedFunctionalityError: system messages are only supported at the beginning of the conversation

[GorvGoyl]

Description

I recently updated my packages and started receiving an error for the Gemini Flash 1.5 AI model. I understand that the system message should come first, but is this a requirement for Google Gemini? I checked the Gemini documentation but couldn't find any information on the order of the system message.

PS: Keeping the system message at last improves the response quality for some models.

Error:   [AI_UnsupportedFunctionalityError: 'system messages are only supported at the beginning of the conversation' functionality not supported.] {
  name: 'AI_UnsupportedFunctionalityError',
  functionality: 'system messages are only supported at the beginning of the conversation'
}
error in streaming generateResponse API  [AI_UnsupportedFunctionalityError: 'system messages are only supported at the beginning of the conversation' functionality not supported.] {
  name: 'AI_UnsupportedFunctionalityError',
  functionality: 'system messages are only supported at the beginning of the conversation'
}
stack trace:  AI_UnsupportedFunctionalityError: 'system messages are only supported at the beginning of the conversation' functionality not supported.
    at convertToGoogleGenerativeAIMessages (webpack-internal:///(middleware)/./node_modules/.pnpm/@[email protected][email protected]/node_modules/@ai-sdk/google/dist/index.mjs:32:17)
    at GoogleGenerativeAILanguageModel.getArgs (webpack-internal:///(middleware)/./node_modules/.pnpm/@[email protected][email protected]/node_modules/@ai-sdk/google/dist/index.mjs:209:51)
    at GoogleGenerativeAILanguageModel.doStream (webpack-internal:///(middleware)/./node_modules/.pnpm/@[email protected][email protected]/node_modules/@ai-sdk/google/dist/index.mjs:307:43)
    at fn (webpack-internal:///(middleware)/./node_modules/.pnpm/[email protected][email protected][email protected][email protected][email protected][email protected][email protected]_b6x64b64e4vtih556h5y2ochom/node_modules/ai/dist/index.mjs:1974:35)
    at eval (webpack-internal:///(middleware)/./node_modules/.pnpm/[email protected][email protected][email protected][email protected][email protected][email protected][email protected]_b6x64b64e4vtih556h5y2ochom/node_modules/ai/dist/index.mjs:1363:28)
    at Object.startActiveSpan (webpack-internal:///(middleware)/./node_modules/.pnpm/[email protected][email protected][email protected][email protected][email protected][email protected][email protected]_b6x64b64e4vtih556h5y2ochom/node_modules/ai/dist/index.mjs:1292:14)
    at recordSpan (webpack-internal:///(middleware)/./node_modules/.pnpm/[email protected][email protected][email protected][email protected][email protected][email protected][email protected]_b6x64b64e4vtih556h5y2ochom/node_modules/ai/dist/index.mjs:1361:17)
    at eval (webpack-internal:///(middleware)/./node_modules/.pnpm/[email protected][email protected][email protected][email protected][email protected][email protected][email protected]_b6x64b64e4vtih556h5y2ochom/node_modules/ai/dist/index.mjs:1963:15)
    at _retryWithExponentialBackoff (webpack-internal:///(middleware)/./node_modules/.pnpm/[email protected][email protected][email protected][email protected][email protected][email protected][email protected]_b6x64b64e4vtih556h5y2ochom/node_modules/ai/dist/index.mjs:122:18)
    at eval (webpack-internal:///(middleware)/./node_modules/.pnpm/[email protected][email protected][email protected][email protected][email protected][email protected][email protected]_b6x64b64e4vtih556h5y2ochom/node_modules/ai/dist/index.mjs:111:25)

Code example

No response

Additional context

"@ai-sdk/google": "^0.0.27",
"ai": "^3.2.33"

[wong2]

I think since the Gemini API returned this error, it means that's how it is

[GorvGoyl]

But if I revert ai-sdk/google to the previous version (0.0.26), the error doesn't appear.

[medkira]

i am facing the same error , and same If i revert ai-sdk/google to the previous version (0.0.26), the error doesn't appear.

[rehmanILMDev]

I think you can use another provider model then system message will supports.