Anthropic Launches Claude Opus 5.5 on AWS, Google Cloud, and Azure With Lower Costs

Anthropic this week released Claude Opus 5.5, the first model in its Claude 5.5 family, simultaneously on Amazon Web Services, Google Cloud, and Microsoft Azure. The new model is priced 40% cheaper than its predecessor, Opus 5, with input and output tokens costing $4 and $20 per million respectively, while also running over 30% faster. Despite the lower cost, Anthropic claims Opus 5.5 matches the performance of the higher-tier Claude Fable 5.1, scoring 66.4% on Terminal-Bench 4.0 compared to Fable 5.1's 55.8%. The model is designed for large-scale tasks such as codebase migrations and audits, with one early tester reportedly auditing a 200,000-line codebase in under three hours versus more than 20 hours with Opus 5. Google Cloud users can access the model through Vertex AI's Model Garden, with regional and multi-region endpoints available and a listed retirement date no earlier than September 22, 2027.