Up to four models

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Side by side on the same independent tests, with price and context. The link in your address bar shares this exact comparison.

Claude Fable 5.1GPT-6.1 Sol

Next to Claude Fable 5.1

Presets

Claude Fable 5.1

192181–203

WeightsClosed

ReleasedSep 2026

Price in / out$10 / $50

Context1M

Core tests taken4 of 8

GPT-6.1 Sol

184168–200

WeightsClosed

ReleasedSep 2026

Price in / out$2.0 / $10

Context1.05M

Core tests taken3 of 8

Claude Fable 5.1 and GPT-6.1 Sol are too close to call (8 points apart, within the uncertainty), ahead on 1 of 2 shared core tests, at 5.0× the price.

Test by testindependent results · Epoch AI

Claude Fable 5.1GPT-6.1 Sol

Only tests that at least two of these models have taken. Bold rows are the core tests shown on every profile; all of these results inform the index score. Task length (METR) is listed below the chart because it is a duration, not a percentage.