Claude Opus 5 launched with 1M context, 128k max output, and thinking on by default.

The key change is Opus 5 adds 1M context and 128k output at Opus 4.8 pricing.

For builders already using Opus 4.8, the same price now buys the newer Opus tier.

• Aug 11, 2026ChatGPT can now show restaurant reservation times from OpenTable, Resy, and Yelp.
• Aug 11, 2026Anthropic removed modelcard text covering Claude Fable 5 and Claude Mythos 5.
• Aug 11, 2026Anthropic pricing removed the Claude plan recommendation quiz and plan result copy

This is the world we build in. It moves this fast. We move with it.