Claude Fable 5.1
active
Anthropic2026-09-01
Specifications
Modalities
text
image
Context Window1000K tokens
Max Output128K tokens
Training Cutoff2026-06-01
Open SourceNo
Pricing (per 1M tokens)
Input$10.0000
Output$50.0000
Cache Read$0.2500
Benchmarks
Arena score (text)1504
Arena ratings: LMArena leaderboard dataset, CC BY 4.0, snapshot 2026-10-28.
MMLU-Pro-
SWE-Bench-
GPQA Diamond-
HumanEval-
ARC-AGI-
MATH-
API
Model ID
claude-fable-5-1Sources
- Anthropic: Claude Fable 5.1
release date · as of 2026-11-02
- Anthropic: Models overview
model id, context window, max output, training cutoff, is frontier · as of 2026-11-02
- Anthropic: Pricing
price input, price output, price cache read, price cache write · as of 2026-11-02
- LMArena: Arena leaderboard dataset, text_style_control overall: Claude Fable 5.1 (Max)
elo rating · as of 2026-10-28