Anthropic removed model-card text covering Claude Fable 5 and Claude Mythos 5.

Builders lose a published reference for IDs, availability, and model selection from this monitored page.

Removed text named claude-fable-5, claude-mythos-5, Project Glasswing, Bedrock, Google Cloud, and Foundry availability.

• Jun 27, 2026OpenAI retired GPT-4.5 in ChatGPT, including custom GPTs, with existing conversations continuing on GPT-5.5.
• Jun 27, 2026OpenAI modelcard diff removed API docs navigation content.
• Jun 26, 2026Anthropic modelcard removed model overview content for Claude Fable 5 and Mythos 5

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