Anthropic launched Claude Fable 5 and Claude Mythos 5 with 1M context by default.

The operator change is 1M context, 128k output, and adaptive thinking by default in the new Claude models.

Fable 5 is widely released, Mythos 5 sits inside Project Glasswing, so access differs by model.

• Jul 18, 2026Anthropic model card shows no readable text change in this diff.
• Jul 18, 2026Anthropic pricing page removed the Claude plan recommendation questionnaire content.
• Jul 18, 2026ChatGPT scheduled tasks gained a sidebar page for viewing, managing, and editing active tasks.

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