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AI models

anthropic

Claude Mythos 5.1

AI model Released Sep 1, 2026

Context window: 1,000,000 tokens
Maximum output: 128,000 tokens
Open weights: No

No matched benchmark results are available for this entry yet.

Run it locally

Inference · memory estimate

Claude Mythos 5.1

Closed weights. No supported local deployment or GPU requirement is published.

Capabilities

Context window: 1,000,000 tokens
Maximum output: 128,000 tokens
Reasoning: Yes
Tool calling: Yes
Open weights: No
Knowledge cutoff: 2026-06

Input modalities

text
image
pdf

Output modalities

text