GPT-5.6 Luna vs Claude Opus 5
49 SHARED BENCHMARKSAcross 49 shared benchmarks, GPT-5.6 Luna scores higher on 4 and Claude Opus 5 on 45. The widest gap is AA-Omniscience · Non-hallucination, where Claude Opus 5 scores 39.2 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: Artificial Analysis for GPT-5.6 Luna; the vendor's own announcement for Claude Opus 5. Prices: OpenAI's own price page for GPT-5.6 Luna; Artificial Analysis for Claude Opus 5. ◆ = independently verified score.
Where each leadsby capability area · benchmark wins
Biggest gaps
GPT-5.6 Luna pulls furthest ahead on
- AA-LCR83.7 vs 79.3
Claude Opus 5 pulls furthest ahead on
- AA-Omniscience · Non-hallucination39.2 vs 7.4
- Terminal-Bench 4.049 vs 11.6
- SimpleBench80.6 vs 46.8
Every shared benchmark49 · grouped by area
Reasoning 7
Coding 7
Agentic 5
Factuality 3
Instruction Following 1
Long Context 1
Math 3
Multimodal 3
Other shared benchmarks 19
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 (openai-official, direct), otherwise the lowest tracked offer.