Claude Fable 5.1 (batch)on Krater.ai
Claude Fable 5.1 improves on Claude Fable 5 across the board, with the biggest gains in agentic coding, long-running agentic workflows, and knowledge work: long code refactors, front-end and visual
Released September 1, 2026
Specifications
Claude Fable 5.1 (batch) at a glance
Context
1M tokens
Max output
128K tokens
Input
Text, Image, File
Output
Text
Input price
$5.00 / 1M
Output price
$25.00 / 1M
Capabilities
What it is good at
Catalog capabilities
- Accepts image input
- Generates text responses
- Supports tool calling
- Supports structured outputs
Good for
Benchmarks
Catalog data, not Krater benchmarks.
Coding index score
81.6
Agentic index score
58
Intelligence index score
53.4
Design Arena fullstack rank
#1
Design Arena python-pptxslides rank
#1
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Compare Claude Fable 5.1 (batch)
Claude Fable 5.1 (batch) vs Claude Fable 5
Claude Fable 5 is a Mythos-class model from Anthropic, built for autonomous knowledge work and coding.
Open comparisonClaude Fable 5.1 (batch) vs Claude Fable 5.1
Claude Fable 5.1 improves on Claude Fable 5 across the board, with the biggest gains in agentic coding, long-running agentic workflows, and knowledge work: long code refactors, front-end and visual
Open comparisonClaude Fable 5.1 (batch) vs Claude Fable 5 (batch)
Claude Fable 5 is a Mythos-class model from Anthropic, built for autonomous knowledge work and coding.
Open comparisonFAQ
Questions about Claude Fable 5.1 (batch)
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