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Claude Fable 5 vs Perceptron Mk1.5

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Claude Fable 5Perceptron Mk1.5
AttributeClaude Fable 5Anthropic · 52 in the newsPerceptron Mk1.5Perceptron
Scores
Intelligence (ECI)163—
Coding94—
Math91—
Reasoning & Knowledge88—
Agentic & Tools92—
Specifications
DeveloperAnthropicPerceptron
FamilyClaude—
ReleasedJun 9, 2026Sep 25, 2026
Parameters——
AvailabilityAPI access—
Context window1M37K
Price — $/M input$10.00$0.15
Price — $/M output$50.00$1.50
Inputstext, image, filetext, image, video, audio
Outputstexttext
Benchmarks
AIME 2024/2025100%—
APEX64%—
ARC-AGI99%—
ARC-AGI-289%—
GPQA Diamond86%—
Humanity's Last Exam56%—
SciCode61%—
SimpleBench82%—
SimpleQA Verified71%—
WebDev Arena1628—
WeirdML92%—
τ²-bench99%—

Use-case scores are 0–100 percentile composites across each area’s benchmarks, ranked against every model from the past year. Highlighted cells lead each row. Open a model for the full picture.

Benchmarks & model data from Epoch AI (CC BY); pricing & specs from OpenRouter. ECI = Epoch Capabilities Index.