Claude Sonnet 4.6 vs GPT-5.6 Luna
42 SHARED BENCHMARKSAcross 42 shared benchmarks, Claude Sonnet 4.6 scores higher on 9 and GPT-5.6 Luna on 33. The widest gap is AA-Omniscience · Non-hallucination, where Claude Sonnet 4.6 scores 51.6 against 7.4. GPT-5.6 Luna is the cheaper of the two on tracked API pricing ($0.20 against $3.00 per million input tokens).
At a glance
Release dates per Artificial Analysis. Prices: Artificial Analysis for Claude Sonnet 4.6; OpenAI's own price page for GPT-5.6 Luna. ◆ = independently verified score.
Where each leadsby capability area · benchmark wins
Biggest gaps
Claude Sonnet 4.6 pulls furthest ahead on
- AA-Omniscience · Non-hallucination51.6 vs 7.4
- MRCR v2 8 needle 128k (average)84.9 vs 74.8
- τ-Bench V3 · Banking34.4 vs 31.1
Every shared benchmark42 · grouped by area
Reasoning 5
Coding 7
Agentic 7
Factuality 3
Instruction Following 1
Long Context 2
Math 1
Multimodal 3
Other shared benchmarks 13
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.