Claude Fable 5

Anthropic · Claude Fable family · released 2026-06-09 · Proprietary license

Anthropic's most capable generally-available model (Mythos-class, June 9 2026). Highest-scoring on Cognition FrontierCode and Hebbia's Finance benchmark per Anthropic. $10/$50 per Mtok, full 1M-token context.

Key specs

TypeAPI (hosted)
Parameters
ArchitectureMythos-class model made safe for general use; state-of-the-art on nearly all tested capability benchmarks per Anthropic
Context window1000K tokens
Knowledge cutoff
Modalitiestext, image
Recommended backends
Minimum viable rig

Benchmark scores

GPQA Diamond
SWE-bench Verified
AIME
MMLU-Pro
BFCL v3 (tool use)
Composite score
Community ratingNo reviews yet

API pricing (per 1M tokens)

ProviderInputOutputFree tier
Anthropic$10$50No