Claude Opus 5.5 arrives: 40% cheaper than Opus 5, cache reads 60% cheaper
dSebastien · x · 2026-09-23
- Claude Opus 5.5 is out: per @addyosmani's intro, it costs 40% less than Opus 5, with cache reads 60% cheaper.
- Capability: Anthropic says it performs at the level of Claude Fable 5.1 for most tasks.
- User @dSebastien reports it works impressively well on his system after hands-on testing.
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