[Bug] Claude 3.5 Opus: Excessive recency bias in task planning
Resolved 💬 2 comments Opened Jun 16, 2026 by shakefu Closed Jun 19, 2026
Bug Description
Severe model regression in Claude Opus 4.8 - cannot successfully Plan a single task. Hyper-recency bias.
Environment Info
- Platform: darwin
- Terminal: iTerm.app
- Version: 2.1.178
- Feedback ID: 6f053097-3062-4c62-9efb-edba8febeba6
Errors
[]TITLE GENERATED BY CLAUDE
[!CAUTION] I asked Claude what model it was - it said Opus 4.8 earlier in the session - but Claude generated the title of this PR as Opus 3.5 - is this a model routing problem?
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