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Hacker News |Technology |Sep 26, 2026

Anthropic’s Claude Opus 5.5 Launches as a Cheaper, More Capable AI Model That Rivals Top Competitors

Anthropic has introduced Claude Opus 5.5, the first model in its new Claude 5.5 family, which performs at the level of Claude Fable 5.1 on most tasks while costing 40 percent less to run than Opus 5.