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Anthropic removed modelcard text for Claude Fable 5 and Claude Mythos 5.
The read
Do not anchor routing or connector configs on removed modelcard identifiers from this page.
The frame
Removed text referenced Claude API IDs, AWS Bedrock, Vertex AI, Project Glasswing, and launch/API-change links.
Primary source
Anthropic modelcard →Keep reading
See what Nova3 builds →Related updates
- Jul 27, 2026Frontier vendors expanded runtime surfaces while removing public plan and model-routing signals.
- Jul 26, 2026OpenAI updated GPT-5.5 Instant to improve conversational quality in decision, advice, planning, research, and shopping tasks.
- Jul 25, 2026Enterprise and Edu users can find skills under Plugins, on the Skills tab in the Plugin Directory.
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