Claude Opus 4.6 vs GPT-5.6 Luna
40 SHARED BENCHMARKSAcross 40 shared benchmarks, Claude Opus 4.6 scores higher on 23 and GPT-5.6 Luna on 17. The widest gap is AA-Omniscience · Non-hallucination, where Claude Opus 4.6 scores 37.2 against 7.4. GPT-5.6 Luna is the cheaper of the two on tracked API pricing ($0.20 against $5.00 per million input tokens).
At a glance
Release dates per Artificial Analysis. Prices: Anthropic's own price page for Claude Opus 4.6; Artificial Analysis for GPT-5.6 Luna. ◆ = independently verified score.
Where each leadsby capability area · benchmark wins
Biggest gaps
Claude Opus 4.6 pulls furthest ahead on
- AA-Omniscience · Non-hallucination37.2 vs 7.4
- SimpleBench67.6 vs 46.8
- GDPVal55.9 vs 47.2
GPT-5.6 Luna pulls furthest ahead on
- FrontierMath Tier 458.5 vs 26.8
- CritPt20.6 vs 12.6
- FrontierMath Tiers 1-3 (v2)82.1 vs 66
Every shared benchmark40 · grouped by area
Reasoning 7
Coding 6
Agentic 4
Factuality 3
Instruction Following 1
Long Context 2
Math 5
Multimodal 3
Other shared benchmarks 9
Each score is the one the model's own page shows — the most authoritative tracked result for that benchmark, on the benchmark's standard methodology (source-attributed). ↓ marks lower-is-better metrics; ◆ an independently verified score. Open either model for its full surface, provenance and pricing. Quoted rates are the price-setter row we currently track for each model — its direct or vendor-official listing where one exists (anthropic-official, direct), otherwise the lowest tracked offer.