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CompareAI models

  1. Claude Fable 5.1Anthropic
  2. GPT-5.6 LunaOpenAI
ReasoningCodingCost efficiencyContext windowMultimodalTool use
Normalized model capability scores
ModelReasoningCodingCost efficiencyContext windowMultimodalTool use
Claude Fable 5.1100/100No data4/10082/10050/100No data
GPT-5.6 Luna39/10081/10064/10099/10050/10069/100
Overview
Author
Context length
1M
1.1M
Reasoning
True
True
Input modalities
Text, Image, Pdf
Text, Image, Pdf
Output modalities
Text
Text
Providers
Pricing
Input
$10/ 1M
$0.20/ 1M
Output
$50/ 1M
$1.20/ 1M
Cached input
$0.25/ 1M
$0.02/ 1M
MomentumLast 2 mo
Unique users
No usage
437K
Completed sessions
No usage
850,736
Token share
No usage
1.22%
Tokens
No usage
5.6T+100%
No trend data
JUL 8SEP 1
RetentionWeek 1
Returning users
Pending
55.2%28K user-weeks

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