Compatibility alias for Claude Fable 5.1. Anthropic retains prompts and outputs for 30 days under its Covered Models policy; Zero Data Retention is not available.
Added Jun 9, 2026
Context Window
1.0M
Max Output
128.0K
Input Price (Auto)
$10.00/1M
Output Price (Auto)
$50.00/1M
Cache Read (Auto)
$0.25/1M
Capabilities
Benchmarks
Benchmarks
Performance metrics and benchmarks
Sourced from Artificial Analysis.
Intelligence Index
53.4
Coding Index
81.6
Agentic Index
57.9
Agentic work
AutomationBench-AA
Workflow automation with guardrail penalties
59.4%
Better than 87% of models compared
AutomationBench-AA Tasks Completed
Fully completed workflows without guardrail violations
32.1%
Better than 64% of models compared
Harvey LAB-AA
Legal agentic work criterion pass rate
93.0%
Better than 88% of models compared
AA-Briefcase
Agentic knowledge work (Elo)
1678 Elo
Better than 98% of models compared
GDPval-AA v2
Economically valuable tasks (Elo)
1735 Elo
Better than 99% of models compared
Document reasoning
GDP.pdf
Professional PDF reasoning: all-pass rate
26.2%
Better than 90% of models compared
AA-LCR v1.1
Long context reasoning with updated grading
85.3%
Better than 99% of models compared
MLCR-AA
Medical long-context reasoning
71.1%
Better than 99% of models compared
Reasoning
HLE
Humanity's Last Exam
59.1%
Better than 99% of models compared
CritPt
Research-level physics reasoning
29.7%
Coding
Terminal-Bench v4.0
Practical coding and terminal tasks
52.0%
Better than 95% of models compared
SciCode
Python programming for scientific computing
63.1%
Better than 99% of models compared
Knowledge
AA-Omniscience Accuracy
Proportion of correctly answered questions
67.2%
AA-Omniscience Hallucination Rate
Rate of incorrect answers among non-correct responses
72.6%
Legacy benchmarks
GPQA Diamond (legacy)
Graduate-level scientific reasoning
93.7%
Better than 98% of models compared
AA-LCR (unversioned / legacy)
Long context reasoning evaluation
85.3%
Better than 99% of models compared
GDPval-AA (unversioned / legacy)
Economically valuable tasks
61.7%
Last updated Sep 26, 2026
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