Claude Opus 5 adds five effort levels and defaults to reasoning on
rohanpaul_ai · x · 2026-07-25
Claude Opus 5 is being described as effectively five models behind one endpoint, with effort levels of low, medium, high, xhigh, and max.
Key points from the post:
- Reasoning is on by default
- The effort setting controls how deeply the model thinks
- Lower settings aim to preserve quality while cutting tokens and latency
- max is meant for the deepest reasoning and longer agent tasks
- This may simplify developer routing because teams may no longer need to swap between cheap and premium reasoning models as often
Related event: Claude Opus 5 Introduces Five Effort Levels with Default Reasoning(2 posts)→
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