Model comparison
GPT-6 Luna vs Pixtral Large
GPT-6 Luna is the stronger model overall, scoring 53.3 to 32.2 on the Noometry Index.
Last verified . 1 shared benchmarks.
Mistral AISummary
- They share 1 benchmark with published results for both. GPT-6 Luna scores higher in 3 categories and Pixtral Large in 0 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where GPT-6 Luna leads 48.2 to 21.7.
- GPT-6 Luna is cheaper at $0.10 / $0.50 per million input/output tokens, against $2 / $6 for Pixtral Large.
- GPT-6 Luna accepts more context: 1.05M tokens versus 128K.
- Pixtral Large has downloadable open weights; the other is API-only.
Side by side
| GPT-6 Luna | Pixtral Large | |
|---|---|---|
| Provider | OpenAI | Mistral AI |
| Noometry Index | 53.3 | 32.2 |
| Released | 2026-09-22 | 2024-11-01 |
| Weights | Proprietary | Open |
| Context window | 1.05M | 128K |
| Max output | 128K | 128K |
| Input $ / M tokens | $0.10 | $2 |
| Output $ / M tokens | $0.50 | $6 |
| Results tracked | 42 | 3 |
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Category by category
Coding Not comparable
GPT-6 Luna: 55.5 (#25), Pixtral Large: —
| Benchmark | GPT-6 Luna | Pixtral Large |
|---|---|---|
| DeepSWE | 66.6% | — |
| FrontierCode | 42.4% | — |
| LMArena WebDev | 1581 | — |
| SciCode | 54.6% | — |
| LMArena Coding | 1439 | — |
| ALE-Bench | 1,577 | — |
Agentic & Tool Use Not comparable
GPT-6 Luna: 33.3 (#54), Pixtral Large: —
| Benchmark | GPT-6 Luna | Pixtral Large |
|---|---|---|
| APEX-Agents | 44.3% | — |
| GDP.pdf | 23% | — |
Reasoning GPT-6 Luna leads
GPT-6 Luna: 48.2 (#41), Pixtral Large: 21.7 (#218)
| Benchmark | GPT-6 Luna | Pixtral Large |
|---|---|---|
| ARC-AGI-2 | 59.3% | — |
| NYT Connections (extended) | 68.7% | — |
| ARC-AGI-1 | 86.7% | — |
| CritPt | 19.4% | — |
| Chess Puzzles | 31% | — |
| EnigmaEval | — | 0.8% |
| LMArena Hard Prompts | 1411 | — |
| Mystery Game Puzzles | 7% | — |
| DTBench | 90.1% | — |
| LMCA | 44.5% | — |
| Epoch Capabilities Index | 156.28 | — |
Math Not comparable
GPT-6 Luna: 76.1 (#15), Pixtral Large: —
| Benchmark | GPT-6 Luna | Pixtral Large |
|---|---|---|
| FrontierMath (Tiers 1-3) | 78.9% | — |
| FrontierMath Tier 4 | 56.1% | — |
| OTIS Mock AIME 2024-2025 | 98.9% | — |
| ProofBench | 64% | — |
| LMArena Math | 1416 | — |
Knowledge Not comparable
GPT-6 Luna: 57.0 (#41), Pixtral Large: —
| Benchmark | GPT-6 Luna | Pixtral Large |
|---|---|---|
| GPQA Diamond | 90.5% | — |
| SimpleQA Verified | 41.4% | — |
| LMArena Expert | 1444 | — |
Multimodal GPT-6 Luna leads
GPT-6 Luna: 42.4 (#30), Pixtral Large: 30.6 (#111)
| Benchmark | GPT-6 Luna | Pixtral Large |
|---|---|---|
| LMArena Vision | 1217 | 1089 |
| Blueprint-Bench 2 | 31.2% | — |
| Furniture Assembly | 44.2% | — |
Multilingual Not comparable
GPT-6 Luna: 50.5 (#117), Pixtral Large: —
| Benchmark | GPT-6 Luna | Pixtral Large |
|---|---|---|
| LMArena Non-English | 1386 | — |
| LMArena Chinese | 1433 | — |
| LMArena French | 1420 | — |
| LMArena German | 1369 | — |
| LMArena Japanese | 1369 | — |
| LMArena Korean | 1360 | — |
| LMArena Russian | 1394 | — |
| LMArena Spanish | 1393 | — |
Instruction Following Not comparable
GPT-6 Luna: 74.3 (#99), Pixtral Large: —
| Benchmark | GPT-6 Luna | Pixtral Large |
|---|---|---|
| LMArena Instruction Following | 1409 | — |
Long Context Not comparable
GPT-6 Luna: 43.0 (#111), Pixtral Large: —
| Benchmark | GPT-6 Luna | Pixtral Large |
|---|---|---|
| LMArena Longer Query | 1409 | — |
Writing & Preference GPT-6 Luna leads
GPT-6 Luna: 58.3 (#119), Pixtral Large: 32.9 (#278)
| Benchmark | GPT-6 Luna | Pixtral Large |
|---|---|---|
| LMArena Text | 1391 | — |
| LMArena Creative Writing | 1363 | — |
| EQ-Bench Creative Writing | — | 988 |
| LMArena Multi-Turn | 1396 | — |
Frequently asked questions
Is GPT-6 Luna better than Pixtral Large?
GPT-6 Luna is the stronger model overall, scoring 53.3 to 32.2 on the Noometry Index.
Which is cheaper, GPT-6 Luna or Pixtral Large?
GPT-6 Luna is cheaper. It lists at $0.10 per million input tokens and $0.50 per million output tokens; Pixtral Large lists at $2 and $6.
Which has the bigger context window?
GPT-6 Luna does, with 1.05M tokens against 128K.
How many benchmarks do GPT-6 Luna and Pixtral Large share?
1 benchmark has published results for both models. GPT-6 Luna has 42 scored results on Noometry and Pixtral Large has 3.