Claude Opus 5 Bedrock context length fixes
Cluster 74263 · agent. Data as of
Nothing open on GitHub. Fix merged in #122633 on 26 Sep 2026. Check it covers your case.
The short answer
- Known?
- Yes. 3 related items grouped here, 1 issue already closed.
- Fix event
- A fix was merged to main in PR #122633. Check it covers your case. No release data is tracked.
- Tracker
- The maintainers' tracker marks this
unresolved. That is separate from the fix event. - Still open
- Nothing open on GitHub.
A bug was identified where Claude 5 models (Sonnet 5, Opus 5) were missing from the BEDROCK_CONTEXT_LENGTHS table, causing them to fall back to a 128K context limit instead of 1M. Related changes add or correct these entries and update model picker availability for Opus 5 and 5.5 on Bedrock.
Open issues0
Open PRs0
Fixes on record
-
#122633 Claude Opus 5.5 shows in the Anthropic and Bedrock pickers; Bedrock Opus 5/5.5 get 1M context (salvage #119444, #75824)
files:
agent/bedrock_adapter.py,contributors/emails/[email protected],contributors/emails/[email protected],contributors/emails/[redacted:email],contributors/emails/[redacted:email],hermes_cli/models_catalog_static.py,tests/agent/test_bedrock_adapter.py
1 PR closed without merging
From the close comments: done elsewhere 1
-
#75824 fix(bedrock): add Claude Opus 5 to the 1M context table (salvage #75432) · done elsewhere →
cda2374,#122633
Closed issues · 1
- Closed#74263[Bug] BEDROCK_CONTEXT_LENGTHS has no Claude 5 entries — sonnet-5/opus-5 resolve to the 128K catch-all, compressor compacts 8x too early
How this cluster was grouped
-
Link evidence (
structural links throughout): every member is connected by structural evidence: shared changed files, or a closing/superseded reference. -
Pairwise link density
0.67: the share of item pairs that carry a link, counting a structural link in full and a relevance-only link at 0.36.1.00means every pair is linked.
Pick up a Lab task
Check whether a fix covers the open issues here, with your own agent. Bring back evidence for maintainers.
Open the LabAt a glance
- Subsystem
- agent
- Merged PRs
- #122633
- Closed issues
- 1
- Attempts
- 1 PR closed without merging
- Fix link checked
- 26 Sep 2026