Anthropic Launches Claude Opus 5.5: Fable 5.1-Level Performance at 40% Lower Cost
psobot · x · 2026-09-23
Anthropic officially introduced Claude Opus 5.5, the first model in its new Claude 5.5 family. The company says it performs at the level of Claude Fable 5.1 for most tasks while costing 40% less to run than Opus 5. Early user commentary highlights writing quality as the standout improvement.
Related event: Anthropic launches Claude Opus 5.5: smarter, faster, 40% cheaper(66 posts)→
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