Claude Opus 4.5 vs GPT-5.6 Luna
36 SHARED BENCHMARKSAcross 36 shared benchmarks, Claude Opus 4.5 scores higher on 9 and GPT-5.6 Luna on 27. The widest gap is AA-Omniscience · Non-hallucination, where Claude Opus 4.5 scores 39 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 4.5; Artificial Analysis for GPT-5.6 Luna. ◆ = independently verified score.
Where each leadsby capability area · benchmark wins
Biggest gaps
Claude Opus 4.5 pulls furthest ahead on
- AA-Omniscience · Non-hallucination39 vs 7.4
- SimpleQA Verified45.7 vs 41
- AA-Omniscience · Accuracy46.6 vs 42.7
GPT-5.6 Luna pulls furthest ahead on
- CritPt20.6 vs 4.6
- FrontierMath Tiers 1-3 (v2)82.1 vs 34.4
- BrowseComp83.3 vs 37
Every shared benchmark36 · grouped by area
Reasoning 5
Coding 6
Agentic 3
Factuality 3
Instruction Following 1
Long Context 1
Math 5
Multimodal 2
Other shared benchmarks 10
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.