Anthropic · Claude

Claude Fable 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
SWE-bench Pro: 80.3
OSWorld-Verified: 85.0
SWE-bench Verified: 95.0
Terminal-Bench 2.1: 88.0
Humanity's Last Exam: 59.0

What do these benchmarks mean? →

Notes

Mythos-class model with safety restrictions for general use. State-of-the-art on nearly all benchmarks.