Anthropic Opus 5.5 scores 93.3% on ARC-AGI-2 at 80% lower eval cost, ARC Prize confirms
burny_tech · x · 2026-09-23
- ARC Prize published verified Opus 5.5 results: 93.3% on ARC-AGI-2 ($0.41/task) and 98.5% on ARC-AGI-1 ($0.16/task).
- Compared to Opus 5, that's +2.9 points on v2 and +1.0 on v1, at roughly 80% lower evaluation cost.
- Official benchmark numbers from the ARC Prize account itself.
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