docs: correct Amazon Bedrock reasoning provider option example

[brianprost]

Background

The docs detail that to enable reasoning for models in Amazon Bedrock, you should set the reasoning_config provider option. However, in the code snippit, the provider option is in camelCase:

const { text, reasoning, reasoningDetails } = await generateText({
  model: bedrock('us.anthropic.claude-3-7-sonnet-20250219-v1:0'),
  prompt: 'How many people will live in the world in 2040?',
  providerOptions: {
    bedrock: {
      // before (does not work): reasoningConfig: { type: 'enabled', budgetTokens: 1024 },
      reasoning_config: { type: 'enabled', budgetTokens: 1024 }, // works
    },
  },
});

Summary

I corrected the code example to use the snake_case casing convention, and confirmed that it worked.

Tasks

• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)
• If required, a patch changeset for relevant packages has been added
• You've run pnpm prettier-fix to fix any formatting issues

Future Work

None

[gr2m]

Thanks Brian for your contribution!

Changes look good to me for the current version. It seems to have been incorrect since the docs where added: https://github.com/vercel/ai/pull/4980/files#diff-7ad7b5eb5101f87657c996a90d248af47e3d0968bca01d4c917273e5a74d486eR334

[lgrammel]

This should be fixed in the provider instead (bug).