FazBrowse GitHub Viewer | Trending |
URL:
| Home
Tools: [Download Repo ZIP]   [Original HTTPS Page]

fix(provider): split Bedrock 1M context models into explicit 200K and 1M variants by karlkurzer · Pull Request #13324 · anomalyco/opencode · GitHub

/ opencode Public

fix(provider): split Bedrock 1M context models into explicit 200K and 1M variants - #13324

Closed
karlkurzer wants to merge 12 commits into
anomalyco:devfrom
karlkurzer:fix/bedrock-1m-context-split
ConversationCommits (12)ChecksFiles changed
Closed

fix(provider): split Bedrock 1M context models into explicit 200K and 1M variants#13324
karlkurzer wants to merge 12 commits into
anomalyco:devfrom
karlkurzer:fix/bedrock-1m-context-split

Conversation

karlkurzer commented Feb 12, 2026 •
edited
Loading

Copy link
Copy Markdown

Summary

  • Split Bedrock Claude Opus 4.6, Sonnet 4.5, and Sonnet 4.6 into explicit 200K (default) and
    1M Experimental variants at models.dev ingestion time
  • The 1M variant sends the required anthropicBeta: ["context-1m-2025-08-07"] flag
    via the AI SDK provider options, which Bedrock requires to unlock the 1M context window
  • The 200K default is the safe path, without the beta flag, Bedrock hard-rejects
    requests above 200K tokens
  • Custom user-configured models are not affected by the split

Why

Bedrock enforces a 200K token hard limit on Claude Opus 4.6, Sonnet 4.5, and Sonnet 4.6 unless the
anthropic_beta: ["context-1m-2025-08-07"] flag is included in the request body (AWS docs).

Testing

  • bun test test/provider/provider.test.ts — 74 tests pass (6 new)
  • bun run typecheck — clean

Closes #13199

github-actions Bot commented Feb 12, 2026

Copy link
Copy Markdown
Contributor

The following comment was made by an LLM, it may be inaccurate:

Potential Duplicate Found

PR #13200: "fix(provider): split Bedrock Opus 4.6 into 200K and 1M variants"
#13200

Why it's related: This PR appears to be addressing the same issue as PR #13324 — splitting Bedrock Claude models (Opus 4.6 and potentially Sonnet 4.5) into separate 200K and 1M context variants. PR #13200 seems to be the earlier/related work that may have been expanded or revised in PR #13324.

Both PRs reference the same underlying issue (#13199) of Bedrock's 200K hard limit requiring the anthropic_beta flag for 1M context access.

karlkurzer mentioned this pull request Feb 12, 2026
Closed

xeaser commented Feb 14, 2026

Copy link
Copy Markdown

@karlkurzer When can we expect a release with this fix? Thanks!

karlkurzer commented Feb 14, 2026

Copy link
Copy Markdown
Author

@xeaser I am just contributing, not maintaining, so not sure, when/if it will be merged, but given the speed of development on OC, I guess it should not be too long. In the meantime, feel free to checkout my branch :-)

xeaser commented Feb 14, 2026

Copy link
Copy Markdown

@karlkurzer Oh I thought you're a maintainer.
Yes I'm using a local build of your branch for now, works great!
Thanks!

fix(provider): split Bedrock 1M context models into explicit 200K and…
ed4128c 
… 1M variants

Bedrock Claude Opus 4.6 and Sonnet 4.5 support 1M token context, but
only when the anthropic_beta flag context-1m-2025-08-07 is sent in the
request body. Without it, Bedrock enforces a 200K hard limit.

Split these models at models.dev ingestion time into a safe 200K default
and an opt-in 1M Experimental variant that sends the required beta flag
via the AI SDK anthropicBeta provider option. Custom user-configured
models are not affected.

Closes anomalyco#13199

mharris717 commented Feb 16, 2026

Copy link
Copy Markdown
Contributor

+1 on experiencing this issue and thinking this PR is likely a good fix

karlkurzer force-pushed the fix/bedrock-1m-context-split branch from 6c1adbd to 7dce8e7 Compare February 17, 2026 08:32
fix(provider): add Bedrock Sonnet 4.6 to 1M context split
4ce19a5 
Sonnet 4.6 (anthropic.claude-sonnet-4-6) also supports 1M context on
Bedrock with the same anthropic_beta flag. Add it to the allowlist so it
gets split into 200K default and 1M Experimental variants.
karlkurzer changed the title fix(provider): split Bedrock 1M context models into explicit 200K and… fix(provider): split Bedrock 1M context models into explicit 200K and 1M variants Feb 18, 2026

karlkurzer commented Feb 18, 2026

Copy link
Copy Markdown
Author

Added support for Sonnet 4.6, FYI

myxoh commented Feb 20, 2026 •
edited
Loading

Copy link
Copy Markdown

@adamdotdevin could we perhaps get this reviewed 🙏? Thank you so much for your work on the project!

inventumamet commented Feb 22, 2026

Copy link
Copy Markdown

did you add opus?

karlkurzer commented Mar 10, 2026

Copy link
Copy Markdown
Author

@adamdotdevin could we perhaps get this reviewed 🙏? Thank you so much for your work on the project!

😃 ?

karlkurzer commented Mar 19, 2026

Copy link
Copy Markdown
Author

Hey @thdxr, now that #18186 has been merged, this PR feels even more critical - am I reading that right?

auscompgeek commented Mar 19, 2026

Copy link
Copy Markdown

My understanding is that now Opus/Sonnet 4.6 1M context window is GA with standard pricing, this is no longer necessary?

karlkurzer commented Mar 19, 2026

Copy link
Copy Markdown
Author

@auscompgeek you are right :-D, this can be dropped then, I missed that 😅

karlkurzer commented Mar 19, 2026

Copy link
Copy Markdown
Author

1M is now available, see @auscompgeek comment

karlkurzer closed this Mar 19, 2026
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode characters
Show hidden characters
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Reviewers

No reviews

Assignees

No one assigned

Labels

None yet

Projects

None yet

Milestone

No milestone

Development

Successfully merging this pull request may close these issues.

Split Bedrock Claude Opus 4.6 into 200K + 1M models and set 1M beta flag

6 participants

Back | FazBrowse Home | New Git URL