Anthropic
Claude Mythos 5.1 Limits
Token limits
| Spec | Value |
|---|---|
| Context window | 1M tokens |
| Max output | 128K tokens |
| Input types | Text, Image |
| Output types | Text |
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Questions
What is the Claude Mythos 5.1 context window
1M tokens, per platform.claude.com, read Nov 9, 2026.
What is the Claude Mythos 5.1 max output
128K tokens, per platform.claude.com.
Source: claude.com, read Nov 9, 2026.