Claude Mythos 5.2

Released 9 Nov 2026 · anthropic.com

Price

Per 1M tokens	Input	Cached	Output
Cache writes $10 (5 minutes), $16 (1 hour)	$8	$0.20	$40

Price history

Date	Input	Cached	Output
9 Nov 2026anthropic.com · 2 · Corroborated	$8	$0.20	$40

Tokens	Context window	Output limit
Default	1M	128K

Context history

Date	Context window	Output limit
9 Nov 2026platform.claude.com · 2 · Corroborated	1M	128K

Benchmark	Score
Terminal-Bench 4.0without safeguards; Claude Code in --bare mode; max effort; 10 trials per task	70.5%
Terminal-Bench Science 0.1highest available effort; without safeguards, per the system card	75.3%Corroborated The same number is printed in 1 other lab document: 1

Sources

Reported by Anthropic