Skip to content

feat(provider/anthropic): Anthropic-native structured outputs #10502

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom
Merged
lgrammel merged 21 commits into from
Nov 24, 2025
Merged

feat(provider/anthropic): Anthropic-native structured outputs #10502

lgrammel merged 21 commits into from
Nov 24, 2025

Conversation

@lgrammel
Copy link
Collaborator

@lgrammel lgrammel commented Nov 23, 2025 •
edited
Loading

Background

Anthropic has introduced structured outputs for Claude Sonnet 4.5 and Claude Opus 4.1

https://platform.claude.com/docs/en/build-with-claude/structured-outputs

Summary

  • enable using output_format for supported models
  • introduce structuredOutputMode provider option with outputFormat, jsonTool, auto settings

Manual Verification

  • run examples/ai-core/src/generate-object/anthropic.ts and check call uses output_format
  • run examples/ai-core/src/stream-object/anthropic.ts and check call uses output_format
  • run examples/ai-core/src/stream-text/anthropic-output-object.ts and check call uses output_format

Tasks

  • add setting
  • document setting
  • test various cases with setting
    • sonnet 4.5 default generate
    • sonnet 4.5 default stream
    • sonnet 4 default
    • sonnet 4.5 off
    • unknown model on

Future Work
@gr2m gr2m added the feature New feature or request label Nov 24, 2025
@lgrammel lgrammel changed the title anthropic strict tool outputs anthropic json output Nov 24, 2025
@lgrammel lgrammel changed the title anthropic json output feat(provider/anthropic): Anthropic-native structured outputs Nov 24, 2025
@lgrammel lgrammel marked this pull request as ready for review November 24, 2025 12:57
@lgrammel lgrammel enabled auto-merge (squash) November 24, 2025 13:58
@lgrammel lgrammel merged commit b8ea36e into main Nov 24, 2025
19 checks passed
@lgrammel lgrammel deleted the lg/qtOQq1me branch November 24, 2025 14:11
@gr2m gr2m added the backport label Nov 24, 2025
vercel-ai-sdk bot pushed a commit that referenced this pull request Nov 24, 2025
@lgrammel @vercel-ai-sdk
Backport conflicts for PR #10502 to release-v5.0
e2e4daa
@vercel-ai-sdk vercel-ai-sdk bot mentioned this pull request Nov 24, 2025
Closed
@vercel-ai-sdk vercel-ai-sdk bot removed the backport label Nov 24, 2025
@vercel-ai-sdk

This comment was marked as outdated.

Sign in to view
@gr2m gr2m added the backport label Nov 24, 2025
vercel-ai-sdk bot pushed a commit that referenced this pull request Nov 24, 2025
@lgrammel @vercel-ai-sdk
Backport conflicts for PR #10502 to release-v5.0
656aea2
@vercel-ai-sdk vercel-ai-sdk bot mentioned this pull request Nov 24, 2025
Merged
3 tasks
@vercel-ai-sdk vercel-ai-sdk bot removed the backport label Nov 24, 2025
@vercel-ai-sdk
Copy link
Contributor

vercel-ai-sdk bot commented Nov 24, 2025

⚠️ Backport to release-v5.0 created but has conflicts: #10552
lgrammel added a commit that referenced this pull request Nov 25, 2025
@vercel-ai-sdk @lgrammel @gr2m
Backport: feat(provider/anthropic): Anthropic-native structured outpu…
f2c6cbd 
…ts (#10552) This is a backport of #10502 to the release-v5.0 branch. The default for output format usage has been changed to `jsonTool`. --------- Co-authored-by: Lars Grammel <lars.grammel@gmail.com> Co-authored-by: Gregor Martynus <39992+gr2m@users.noreply.github.com>
@TigerHix
Copy link

TigerHix commented Dec 2, 2025

Thanks for the update. Any ETA on the strict: true parameter for tool calls / any workarounds? Just hit this issue after migrating to AI SDK from Anthropic's SDK. :(
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Labels

ai/provider feature New feature or request provider/anthropic

5 participants

@lgrammel @TigerHix @nicoalbanese @gr2m