Claude Sonnet 5 vs GPT-5.6 Luna
45 SHARED BENCHMARKSAcross 45 shared benchmarks, Claude Sonnet 5 scores higher on 30 and GPT-5.6 Luna on 13, with 2 level. The widest gap is AA-Omniscience · Non-hallucination, where Claude Sonnet 5 scores 60.6 against 7.4. GPT-5.6 Luna is the cheaper of the two on tracked API pricing ($0.20 against $2.00 per million input tokens).
At a glance
Release dates per Artificial Analysis. Prices: Artificial Analysis for Claude Sonnet 5; OpenAI's own price page for GPT-5.6 Luna. ◆ = independently verified score.
Where each leadsby capability area · benchmark wins
Biggest gaps
Claude Sonnet 5 pulls furthest ahead on
- AA-Omniscience · Non-hallucination60.6 vs 7.4
- SimpleBench60.6 vs 46.8
- LiveBench · Agentic Coding59.4 vs 48.4
GPT-5.6 Luna pulls furthest ahead on
- FrontierMath Tier 458.5 vs 29.3
- FrontierMath Tiers 1-3 (v2)82.1 vs 65.6
- CritPt20.6 vs 16.9
Every shared benchmark45 · grouped by area
Reasoning 5
Coding 7
Agentic 5
Factuality 3
Instruction Following 1
Long Context 2
Math 3
Multimodal 3
Other shared benchmarks 16
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 (direct, openai-official), otherwise the lowest tracked offer.