SOURCE-LINKED INTELLIGENCE
Introducing Claude Opus 5.5
Opus 5.5 performs at the level of Claude Fable 5.1 on most work and costs 40% less to run than Opus 5.
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Evidence & attribution
- Anthropic News · 2026-09-22T00:00:00.000Z
First collected: 2026-09-22T17:11:34.770Z. This is not the publication date.