Anthropic · Claude

Claude Mythos 5

Current · Released: June 9, 2026

Context window: 1.000.000 tokens
Max output: —
Price input / 1M tokens: $10.00
Price output / 1M tokens: $50.00

Benchmark scores

GDPval-AA: 1,932.0
GPQA Diamond: 94.6
SWE-bench Pro: 77.8
SWE-bench Verified: 93.9

What do these benchmarks mean? →

Notes

Unrestricted version of Fable 5, only available to cyberdefenders via Project Glasswing.