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GPT-5.6 Luna vs GPT-6.1 Sol

17 SHARED BENCHMARKS

Across 17 shared benchmarks, GPT-5.6 Luna scores higher on 0 and GPT-6.1 Sol on 17. The widest gap is Production Benchmarks - Gore, where GPT-6.1 Sol scores 0.9 against 0.6. GPT-5.6 Luna is the cheaper of the two on tracked API pricing ($0.20 against $2.00 per million input tokens).

OPENAIVSOPENAI17 SHARED0–17 HEAD-TO-HEADNEWEST SCORE ADDED

At a glance

GPT-5.6 LunaGPT-6.1 Sol
MakerOpenAIOpenAI
Released—
Price per 1M tokens input / output$0.20 / $1.20$2.00 / $10.00
Cost of 1M in + 1M out$1.40 8.6× less$12.00
Head-to-head of 17 shared benchmarks0 wins17 wins
Scores tracked independently verified201 43 ◆17 0 ◆

GPT-5.6 Luna's release date per Artificial Analysis. Prices: Artificial Analysis for GPT-5.6 Luna; Artificial Analysis for GPT-6.1 Sol. ◆ = independently verified score.

Every shared benchmark17 · grouped by area

Other shared benchmarks 17

BenchmarkGPT-5.6 LunaMARGINGPT-6.1 Sol
Dynamic Benchmarks - Emotional reliance11
Dynamic Benchmarks - Mental health11
Dynamic Benchmarks - Self-harm0.91
HealthBench Consensus length-adjusted95.196
HealthBench Hard length-adjusted3236.2
HealthBench Professional length-adjusted55.764.2
Image input evaluations - extremism11
Image input evaluations - harms-erotic11
Image input evaluations - hate11
Image input evaluations - self-harm11
Production Benchmarks - Gore0.60.9
U18 evaluations - Age-restricted goods, services, and dangerous challenges / activities0.80.9
U18 evaluations - Eating Disorders0.71
U18 evaluations - Emotional Reliance0.91
U18 evaluations - Gore0.80.9
U18 evaluations - Self Harm11
U18 evaluations - Sexual Content0.91

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.

Compare GPT-5.6 Luna withALL PAIRINGS →

OpenAIGPT-5.5GPT-5.6 SolGPT-5.4GPT-5.2GPT-5GPT-6 Astra
Across the fieldGemini 3.1 ProClaude Opus 4.8Claude Opus 4.6Claude Opus 4.7Claude Fable 5Claude Opus 5Claude Opus 4.5DeepSeek-V4-Pro