Compare · AI models

Claude Fable 5.1 vs Claude Opus 4.7

RANKED BY EPOCH CAPABILITIES INDEX (ECI) #2 VS #19 CHECKED 28 SEPT 2026

Side by side

Verdict

Claude Fable 5.1 ranks #2 of 20 on Epoch Capabilities Index (ECI) (165.00); Claude Opus 4.7 ranks #19 (156.39).

Rank 02 of 20 · leads

Claude Fable 5.1

Epoch Capabilities Index (ECI)

165.00

MakerAnthropic

Date2026

Verified—

Evidence

Epoch AI epoch_capabilities_index/eci_scores.csv (LLM Benchmark Data ZIP, fetched 2026-09-28). ECI 165, accessibility API access, release date 2026-09-01. Not matched in Statlyte’s dataset this run.

Rank 19 of 20

Claude Opus 4.7

Epoch Capabilities Index (ECI)

156.39

MakerAnthropic

Date2026

Verified—

Evidence

Epoch AI epoch_capabilities_index/eci_scores.csv (LLM Benchmark Data ZIP, fetched 2026-09-28). ECI 156.39, accessibility API access, release date 2026-04-16. Pricing/context via Statlyte (statlyte.com/models/anthropic/claude-opus-4-7), MIT licensed.

Try another pair

More Claude Fable 5.1 matchups

Source Ranking: Epoch AI, AI Benchmarking Hub, Epoch Capabilities Index (epoch.ai/data/benchmark_data.zip, CC BY 4.0). Per-entry pricing/context:… Last checked 28 Sept 2026

Full AI models ranking Spot an error? Send a tip