vercel/ai @ai-sdk/anthropic@4.0.0

on GitHub

Major Changes

• 832f86f: fix(anthropic): remove cacheCreationInputTokens from providerMetadata

• 34bd95d: feat(ai): add support for uploading provider skills using the provider references abstraction

• ef992f8: Remove CommonJS exports from all packages. All packages are now ESM-only ("type": "module"). Consumers using require() must switch to ESM import syntax.

• c29a26f: feat(provider): add support for provider references and uploading files as supported per provider

• 3887c70: feat(provider): add new top-level reasoning parameter to spec and support it in generateText and streamText

• 8359612: Start v7 pre-release

• 04e9009: chore: make provider implementations code patterns more consistent, including renaming certain exported symbols

  For all externally exported symbols that were renamed, the old names continue to work via deprecated aliases.

Patch Changes

• e02f041: feat(provider/anthropic): add support for claude-opus-4-8

• 648705c: fix(provider/anthropic): fix remaining errors with Anthropic code_execution tool dynamic calls from latest web_fetch or web_search

• 38fc777: Add AI Gateway hint to provider READMEs

• ee798eb: chore(provider-utils): rename Experimental_Sandbox to Experimental_SandboxSession

• e748b35: chore: update v3 specs to v4

• 19c5ee2: fix(anthropic): reorder assistant content b/w client and provider tool use

• 0ee8aec: feat (provider/anthropic): support passing metadata.user_id

• c012d57: feat(anthropic): sanitize the unsupported JSON schema validation properties

• 8018480: feat(anthropic): add the new advisor tool

• e5c4f40: Remove stale effort-2025-11-24 beta header — the extended thinking effort parameter is GA and no longer requires the beta flag. Vertex AI's strict validator was actively rejecting requests with this header.

• f57c702: fix(anthropic): allow both temperature and topP for non-Anthropic models using the Anthropic-compatible API

  The temperature/topP mutual exclusivity check now only applies to known Anthropic models (model IDs starting with claude-). Non-Anthropic models using the Anthropic-compatible API (e.g. Minimax) can now send both parameters as required by their APIs.

• 2610e84: feat(provider/anthropic): automatically use sandbox in bash tool

• d848405: feat: add optional abortSignal parameters to sandbox command execution

• 87d1723: chore(anthropic): remove unnecessary messages affix from Anthropic symbols and files

• 9f0e36c: trigger release for all packages after provenance setup

• acdbf84: Handle errors from anthropic websearch tool

• ad0b376: fix(provider/anthropic): stop adding fine-grained-tool-streaming-2025-05-14 beta for claude-opus-4-7

• 58a2ad7: fix: more precise default message for tool execution denial

• 21d1ee3: fix(anthropic): skip passing beta header for tool search tools

• 1fe058b: fix(anthropic): preserve the error code returned by model

• 7fc6bd6: Raise minimum supported Node.js version to 22. Supported versions: 22, 24, and 26.

• 09bd27b: feat (provider/anthropic): add support for inference_geo provider option

• 0c4c275: trigger initial canary release

• 6fd51c0: fix(provider): preserve error type prefix in getErrorMessage

• e311194: feat(ai): allow passing provider instance to uploadFile and uploadSkill as shorthand

• 6c93e36: feat(provider-utils): add spawnCommand method to Experimental_Sandbox to allow for detached command execution

• 9bd6512: feat(provider): change file part data property to be tagged with a type and remove the image part type

• 258c093: chore: ensure consistent import handling and avoid import duplicates or cycles

• 5463d0d: feat(provider): align tool result output content file part types with top-level message file part types

• b8396f0: trigger initial beta release

• 6b4d325: feat(provider/anthropic): add support for claude-fable-5 and the fallbacks API parameter

• f05a40d: fix(vertex): throw warning when strict: true for vertexAnthropic

• a6617c5: feat(provider-utils): add readFile and writeFile plus convenience wrappers to Experimental_Sandbox abstraction

• a464505: fix(anthropic): propagate toModelOutput providerOption to anthropic tool results

• 90e2d8a: chore: fix unused vars not being flagged by our lint tooling

• b3976a2: Add workflow serialization support to all provider models.

  @ai-sdk/provider-utils: New serializeModel() helper that extracts only serializable properties from a model instance, filtering out functions and objects containing functions. Third-party provider authors can use this to add workflow support to their own models.

  All providers: headers is now optional in provider config types. This is non-breaking — existing code that passes headers continues to work. Custom provider implementations that construct model configs manually can now omit headers, which is useful when models are deserialized from a workflow step boundary where auth is provided separately.

  All provider model classes now include WORKFLOW_SERIALIZE and WORKFLOW_DESERIALIZE static methods, enabling them to cross workflow step boundaries without serialization errors.

• 0d8f107: feat(provider/anthropic): add support for Opus 4.7 and relevant API enhancements

• ff5eba1: feat: roll image-* tool output types into their equivalent file-* types