Incorrect stderr warning for `includeThoughts` parameter for google provider

[danthegoodman1]

Description

AI SDK Warning: The 'includeThoughts' option is only supported with the Google Vertex provider and might not be supported or could behave unexpectedly with the current Google provider (google.generative-ai).

This is not true. If you omit this, then the generateText.reasoning returns nothing. If you set it to includeThoughts: true, then you get reasoning.

AI SDK Version

"@ai-sdk/google": "^2.0.23",
"ai": "^5.0.78",

Code of Conduct

• I agree to follow this project's Code of Conduct

[danthegoodman1]

_AISDKError2 [GatewayError]: Vercel AI Gateway access failed.

https://github.com/vercel/ai/actions/runs/18826477808/job/53710042806

[gr2m]

fixed via #10342