Model comparison
DeepSeek-V3 vs GPT-6 Luna
GPT-6 Luna is the stronger model overall, scoring 45.1 to 39.2 on the Noometry Index.
Last verified . 13 shared benchmarks.
DeepSeekSummary
- They share 13 benchmarks with published results for both. DeepSeek-V3 scores higher in 0 categories and GPT-6 Luna in 8 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in coding, where GPT-6 Luna leads 54.7 to 41.9.
- GPT-6 Luna is cheaper at $0.10 / $0.50 per million input/output tokens, against $0.24 / $0.90 for DeepSeek-V3.
- GPT-6 Luna accepts more context: 1.05M tokens versus 164K.
- DeepSeek-V3 has downloadable open weights; the other is API-only.
Side by side
| DeepSeek-V3 | GPT-6 Luna | |
|---|---|---|
| Provider | DeepSeek | OpenAI |
| Noometry Index | 39.2 | 45.1 |
| Released | 2024-12-26 | 2026-09-22 |
| Weights | Open | Proprietary |
| Context window | 164K | 1.05M |
| Max output | 164K | 128K |
| Input $ / M tokens | $0.24 | $0.10 |
| Output $ / M tokens | $0.90 | $0.50 |
| Results tracked | 60 | 18 |
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Category by category
Coding GPT-6 Luna leads
DeepSeek-V3: 41.9 (#99), GPT-6 Luna: 54.7 (#24)
| Benchmark | DeepSeek-V3 | GPT-6 Luna |
|---|---|---|
| LMArena Coding | 1368 | 1448 |
| DeepSWE | — | 66.6% |
| FrontierCode | — | 42.4% |
| Aider Polyglot | 55.1% | — |
| LMArena WebDev | — | 1583 |
| SciCode | 35.8% | — |
| WeirdML | 36.1% | — |
| BigCodeBench Instruct | 50% | — |
| LiveBench Coding | 70.9% | — |
| BigCodeBench Complete | 62.2% | — |
| HumanEval+ | 86.6% | — |
| MBPP+ | 73% | — |
Agentic & Tool Use Not comparable
DeepSeek-V3: —, GPT-6 Luna: —
| Benchmark | DeepSeek-V3 | GPT-6 Luna |
|---|---|---|
| METR Time Horizons | 49.6% | — |
Reasoning GPT-6 Luna leads
DeepSeek-V3: 20.0 (#226), GPT-6 Luna: 31.7 (#68)
| Benchmark | DeepSeek-V3 | GPT-6 Luna |
|---|---|---|
| LMArena Hard Prompts | 1365 | 1415 |
| SimpleBench | 27.2% | — |
| Kagi LLM Benchmark | 52.3% | — |
| NYT Connections (extended) | — | 68.7% |
| CritPt | 0% | — |
| LiveBench Reasoning | 65.8% | — |
| DTBench | 64.8% | — |
| LiveBench Data Analysis | 60.9% | — |
| LMCA | 15.5% | — |
| BIG-Bench Hard | 87.5% | — |
| Epoch Capabilities Index | 135.95 | — |
| ForecastBench | 59.1 | — |
| HellaSwag | 88.9% | — |
| LiveBench | 66.9% | — |
| PIQA | 84.7% | — |
| WinoGrande | 85.2% | — |
Math GPT-6 Luna leads
DeepSeek-V3: 30.4 (#208), GPT-6 Luna: 35.6 (#140)
| Benchmark | DeepSeek-V3 | GPT-6 Luna |
|---|---|---|
| LMArena Math | 1373 | 1396 |
| OTIS Mock AIME 2024-2025 | 37.8% | — |
| Omni-MATH | 40.3% | — |
| LiveBench Math | 73.5% | — |
| MATH Level 5 | 75.5% | — |
| FrontierMath (Feb 2025 set) | 1.7% | — |
Knowledge GPT-6 Luna leads
DeepSeek-V3: 37.5 (#147), GPT-6 Luna: 40.1 (#110)
| Benchmark | DeepSeek-V3 | GPT-6 Luna |
|---|---|---|
| LMArena Expert | 1352 | 1458 |
| GPQA Diamond | 67.6% | — |
| MMLU-Pro | 72.3% | — |
| Confabulations | 26.1% | — |
| Vectara Hallucination Rate | 6.1% | — |
| GPQA (HELM) | 53.8% | — |
| ARC (AI2) Challenge | 95.3% | — |
| MMLU | 87.2% | — |
| TriviaQA | 82.9% | — |
Multimodal Not comparable
DeepSeek-V3: —, GPT-6 Luna: 42.0 (#27)
| Benchmark | DeepSeek-V3 | GPT-6 Luna |
|---|---|---|
| Furniture Assembly | — | 44.2% |
Multilingual GPT-6 Luna leads
DeepSeek-V3: 48.8 (#138), GPT-6 Luna: 51.0 (#111)
| Benchmark | DeepSeek-V3 | GPT-6 Luna |
|---|---|---|
| LMArena Non-English | 1358 | 1390 |
| LMArena Chinese | 1390 | 1425 |
| LMArena Russian | 1372 | 1392 |
| LMArena Spanish | 1358 | 1416 |
| LMArena French | 1386 | — |
| LMArena German | 1374 | — |
| LMArena Japanese | 1333 | — |
| LMArena Korean | 1321 | — |
Instruction Following GPT-6 Luna leads
DeepSeek-V3: 73.0 (#125), GPT-6 Luna: 74.7 (#85)
| Benchmark | DeepSeek-V3 | GPT-6 Luna |
|---|---|---|
| LMArena Instruction Following | 1345 | 1414 |
| LiveBench Instruction Following | 81.5% | — |
| IFEval | 83.2% | — |
Long Context GPT-6 Luna leads
DeepSeek-V3: 34.0 (#248), GPT-6 Luna: 43.3 (#95)
| Benchmark | DeepSeek-V3 | GPT-6 Luna |
|---|---|---|
| LMArena Longer Query | 1353 | 1417 |
| Fiction.LiveBench | 50% | — |
Writing & Preference Too close to call
DeepSeek-V3: 57.6 (#124), GPT-6 Luna: 58.4 (#115)
| Benchmark | DeepSeek-V3 | GPT-6 Luna |
|---|---|---|
| LMArena Text | 1375 | 1392 |
| LMArena Creative Writing | 1364 | 1357 |
| LMArena Multi-Turn | 1389 | 1400 |
| Short-Story Creative Writing | 77% | — |
| EQ-Bench Creative Writing | 1472 | — |
| WildBench | 83% | — |
| LiveBench Language | 49.1% | — |
Frequently asked questions
Is DeepSeek-V3 better than GPT-6 Luna?
GPT-6 Luna is the stronger model overall, scoring 45.1 to 39.2 on the Noometry Index.
Which is cheaper, DeepSeek-V3 or GPT-6 Luna?
GPT-6 Luna is cheaper. It lists at $0.10 per million input tokens and $0.50 per million output tokens; DeepSeek-V3 lists at $0.24 and $0.90.
Is DeepSeek-V3 or GPT-6 Luna better for coding?
GPT-6 Luna scores higher on coding benchmarks: 54.7 versus 41.9 in the Noometry coding category.
Which has the bigger context window?
GPT-6 Luna does, with 1.05M tokens against 164K.
How many benchmarks do DeepSeek-V3 and GPT-6 Luna share?
13 benchmarks have published results for both models. DeepSeek-V3 has 60 scored results on Noometry and GPT-6 Luna has 18.