Anthropic · Claude · Fable · Mythos

Claude Haiku 5.5

Released 7 Oct 2026 · 9 days after Claude Sonnet 5.5

Intelligence

36.5

#9 of 25 scored releases to that date

Price

$0.20

per 1M tokens, 3:1 in/out · $0.1 in / $0.5 out

Speed

236

output tokens/s, median

Weights

Closed

US lab

Anthropic’s best score over time