Anthropic launched Claude Opus 5.5, saying it costs about 40% less to run than Opus 5 and generates output over 30% faster. Input costs $4 per million tokens, output $20 per million tokens, and cached reads $0.20 per million tokens. In one coding benchmark, Opus 5.5 scored 66.4%, compared with 52.3% for Opus 5.
The model is available through Claude, Amazon Web Services, Google Cloud and Microsoft Azure. Anthropic is reportedly considering a November public listing, but it has not publicly confirmed final IPO terms or a completed valuation.
