Technical insights, tutorials, and updates from the EvoLink team. Learn how to optimize your AI costs and build better applications.
Claude Opus 5.5 was released on September 22, 2026. This release update covers the confirmed model facts, the price cut against Opus 5, the four breaking changes for existing integrations, and the next steps for EvoLink users.
An upgrade decision guide for teams running Claude Opus 5: what Anthropic changed in Opus 5.5, how to compare cost on the same basis, which requests break, and how to move traffic with a rollback path.
Choose between Sonnet 5.5 and Opus 5.5 with a workload matrix, cache-cost caveats, a bounded escalation policy, and a repeatable evaluation method.
