## Summary

Backport of #12743 to `release-v5.0`.

- Passes the `cacheControl` provider option as a top-level
`cache_control` field in the Anthropic API request body to support
[automatic
caching](https://platform.claude.com/docs/en/docs/build-with-claude/prompt-caching#automatic-caching)
- Includes tests for both `{ type: 'ephemeral' }` and `{ type:
'ephemeral', ttl: '1h' }`
- Includes patch changeset for `@ai-sdk/anthropic`

---------

Co-authored-by: Jade River Stokes <jaderiverstokes@gmail.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

This PR was opened by the [Changesets
release](https://github.com/changesets/action) GitHub action. When
you're ready to do a release, you can merge this and the packages will
be published to npm automatically. If you're not ready to do a release
yet, that's fine, whenever you add more changesets to release-v5.0, this
PR will be updated.


# Releases
## @ai-sdk/amazon-bedrock@3.0.84

### Patch Changes

-   Updated dependencies [e1b08a6]
    -   @ai-sdk/anthropic@2.0.67

## @ai-sdk/anthropic@2.0.67

### Patch Changes

- e1b08a6: Pass `cacheControl` provider option as top-level
`cache_control` in Anthropic API request body to support automatic
caching.

## @ai-sdk/google-vertex@3.0.108

### Patch Changes

-   Updated dependencies [e1b08a6]
    -   @ai-sdk/anthropic@2.0.67

Co-authored-by: vercel-ai-sdk[bot] <225926702+vercel-ai-sdk[bot]@users.noreply.github.com>

…AI_API_KEY (#12861)

This is an automated backport of #12857 to the release-v5.0 branch

---------

Co-authored-by: Gregor Martynus <39992+gr2m@users.noreply.github.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

…12750)

This PR was opened by the [Changesets
release](https://github.com/changesets/action) GitHub action. When
you're ready to do a release, you can merge this and the packages will
be published to npm automatically. If you're not ready to do a release
yet, that's fine, whenever you add more changesets to release-v5.0, this
PR will be updated.


# Releases
## @ai-sdk/togetherai@1.0.36

### Patch Changes

- a0e97f0: Use `TOGETHER_API_KEY` as the default environment variable
for the Together.ai provider, matching Together.ai's own convention.
`TOGETHER_AI_API_KEY` is still supported but deprecated and will emit a
console warning.

Co-authored-by: vercel-ai-sdk[bot] <225926702+vercel-ai-sdk[bot]@users.noreply.github.com>

…able for o11y (#12852)

This is an automated backport of #12835 to the release-v5.0 branch. FYI
@shaper

Co-authored-by: Walter Korman <shaper@vercel.com>

This PR was opened by the [Changesets
release](https://github.com/changesets/action) GitHub action. When
you're ready to do a release, you can merge this and the packages will
be published to npm automatically. If you're not ready to do a release
yet, that's fine, whenever you add more changesets to release-v5.0, this
PR will be updated.


# Releases
## ai@5.0.139

### Patch Changes

-   Updated dependencies [9212b2d]
    -   @ai-sdk/gateway@2.0.45

## @ai-sdk/angular@1.0.139

### Patch Changes

-   ai@5.0.139

## @ai-sdk/gateway@2.0.45

### Patch Changes

- 9212b2d: feat (provider/gateway): pass through project id when
available for o11y

## @ai-sdk/langchain@1.0.139

### Patch Changes

-   ai@5.0.139

## @ai-sdk/llamaindex@1.0.139

### Patch Changes

-   ai@5.0.139

## @ai-sdk/react@2.0.141

### Patch Changes

-   ai@5.0.139

## @ai-sdk/rsc@1.0.141

### Patch Changes

-   ai@5.0.139

## @ai-sdk/svelte@3.0.139

### Patch Changes

-   ai@5.0.139

## @ai-sdk/vue@2.0.139

### Patch Changes

-   ai@5.0.139

Co-authored-by: vercel-ai-sdk[bot] <225926702+vercel-ai-sdk[bot]@users.noreply.github.com>