Gemini thinking model can't set budget to 0

[ananaBMaster]

Description

model: gemini-2.5-pro

export async function aiTranslate(provider: LLMTranslateProviderNames, modelString: string, prompt: string) {
  const model = await getTranslateModel(provider, modelString)

  const providerOptions: Record<string, Record<string, JSONValue>> = {
    google: {
      thinkingConfig: {
        thinkingBudget: 0,
      },
    },
  }

  const { text } = await generateText({
    model,
    prompt,
    providerOptions,
  })
  return text
}

Then I got

AI SDK Version

ai: ^5.0.9

"@ai-sdk/react": "^2.0.10",
ai-sdk/google: ^2.0.4

[ananaBMaster]

some models from Gemini can set thinkingBudge = 0 but some not. Is this behavior what we expect?

If yes, can I ask how to distinguish the models that support thinkingBudget = 0?

[patelvivekdev]

You cannot disable the thinking in gemini-2.5-pro.

https://ai.google.dev/gemini-api/docs/thinking#set-budget