Anthropic removed modelcard text recommending Opus 5 and listing Fable 5/Mythos 5.

Do not treat the previous Fable 5 and Mythos 5 availability language as current without checking the page.

The removed copy included model selection guidance, channel availability, and Project Glasswing access language.

• Aug 22, 2026OpenAI model docs removed GPT-5.6 Sol, Terra, and Luna model guidance.
• Aug 22, 2026Anthropic released v1.0 of the Python SDK, moving its HTTP layer from httpx to httpx2.
• Aug 22, 2026Anthropic moved computer use out of beta on Claude API as `computer_toolset_20260801`.

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