#1
Claude Fable 5.1
claude-fable-5-1
0.0
Helpfulness
Instruction Following
Comprehension
Empathy
Creative Writing
Helpfulness
0.0
Instruction Following
0.0
Comprehension
0.0
Empathy
0.0
Creative Writing
0.0
Speed
Avg 44 tok/s
Release Date
September 1st, 2026
Lab
Anthropic
Type
Proprietary
Context Size
1M
Max Output Tokens
128K
Cost per 1 million tokens
$10.00 / $50.00
Model Inputs*
Text, Images
Model Outputs*
Text
Tool Calling*
Enabled
Overall Assistant Score
An average score combining the 5 main categories.
96.80 pts
Rank #1
100th Percentile
0
Novice
33
Capable
66
Proficient
100
Expert
Claude Fable 5.1 is the best assistant we have scored: our tests put it #1 overall, with empathy and creative writing clearly ahead of GPT-6 Astra. It is not our recommended daily driver. Adaptive thinking is always on, so the average assistant query costs and waits much more than cheaper models—for a personal assistant, speed matters too. Outputs are text-watermarked (chatio.dev/blog/how-anthropic-and-google-watermark-text), so skip it for copywriting or consumer-facing text.

Overall Score vs Price

Price axis is logarithmic (USD per 1M input tokens) · Higher score and lower price is better

Ringed point is this model

Anthropic
DeepSeek
Google
Meta
Moonshot
OpenAI
SpaceX AI
Zhipu AI

Intelligence

Overall Score · Higher is better

Speed

Output tokens per second · Higher is better

Price

USD per 1M input tokens · Lower is better

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