Anthropic shipped Claude Opus 5 on July 24, calling it a step-change over Opus 4.8, not a routine bump
The model runs a 1M token context window as both default and maximum, 128k max output tokens, with thinking on by default
Anthropic says it approaches Fable 5 intelligence at roughly half the price, with per-token pricing unchanged from Opus 4.8
It shipped everywhere at once, the Claude API, AWS, Google Cloud, and Microsoft Foundry, and is now the default Opus model in Claude Code
What Anthropic Actually Shipped
