GPT-5.1 vs GPT-5.6 Luna
29 SHARED BENCHMARKSAcross 29 shared benchmarks, GPT-5.1 scores higher on 4 and GPT-5.6 Luna on 25. The widest gap is AA-Omniscience · Non-hallucination, where GPT-5.1 scores 48.1 against 7.4. GPT-5.6 Luna is the cheaper of the two on tracked API pricing ($0.20 against $1.25 per million input tokens).
At a glance
Release dates per Artificial Analysis. Prices: Artificial Analysis for GPT-5.1; Artificial Analysis for GPT-5.6 Luna. ◆ = independently verified score.
Where each leadsby capability area · benchmark wins
Biggest gaps
GPT-5.1 pulls furthest ahead on
- AA-Omniscience · Non-hallucination48.1 vs 7.4
- SimpleQA Verified48 vs 41
- SimpleBench53.2 vs 46.8
Every shared benchmark29 · grouped by area
Reasoning 5
Coding 4
Agentic 3
Factuality 3
Long Context 1
Multimodal 2
Other shared benchmarks 11
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, direct), otherwise the lowest tracked offer.