Claude Mythos 5.1
Claude Mythos 5.1 is a closed source large language model that takes text and image input and returns text. It is functionally identical to Claude Fable 5.1 but ships with more permissive safeguards for vetted users, and is available by invitation only. It has a 1M token context window and a 128K token maximum output. Extended thinking is adaptive and always on, with a default effort level of high. It supports tool use and function calling. Training data cutoff is June 2026.
- Type
- Multimodal
- Weights
- Closed
- Downloads
- 2k
- Likes
- 944
- Pipeline
- text generation
- License
- apache-2.0
Model hub
empero-ai/Qwythos-9B-Claude-Mythos-5-1M
- Repo
- empero-ai/Qwythos-9B-Claude-Mythos-5-1M
- Library
- transformers
- Access
- Public
Technical tags and languages
Related tools
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About Anthropic
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Anthropic develops reliable and interpretable artificial intelligence systems, including the Claude family of AI assistants.
Tools using Claude Mythos 5.1
15