Model comparison
Gemini 3.7 Flash vs GPT-6 Luna
Gemini 3.7 Flash is the stronger model overall, scoring 59.8 to 45.1 on the Noometry Index. GPT-6 Luna costs 7.5× less per token, which makes it the better buy when Gemini 3.7 Flash's lead doesn't matter for your workload.
Last verified . 18 shared benchmarks.
GoogleSummary
- They share 18 benchmarks with published results for both. Gemini 3.7 Flash scores higher in 8 categories and GPT-6 Luna in 1 category; 8 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Gemini 3.7 Flash leads 70.1 to 31.7.
- The biggest single-benchmark swing is NYT Connections (extended): 94% for Gemini 3.7 Flash and 68.7% for GPT-6 Luna.
- GPT-6 Luna is cheaper at $0.10 / $0.50 per million input/output tokens, against $0.75 / $3.75 for Gemini 3.7 Flash.
- GPT-6 Luna accepts more context: 1.05M tokens versus 1.05M.
Side by side
| Gemini 3.7 Flash | GPT-6 Luna | |
|---|---|---|
| Provider | OpenAI | |
| Noometry Index | 59.8 | 45.1 |
| Released | 2026-08-13 | 2026-09-22 |
| Weights | Proprietary | Proprietary |
| Context window | 1.05M | 1.05M |
| Max output | 66K | 128K |
| Input $ / M tokens | $0.75 | $0.10 |
| Output $ / M tokens | $3.75 | $0.50 |
| Results tracked | 44 | 18 |
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Category by category
Coding Too close to call
Gemini 3.7 Flash: 55.7 (#19), GPT-6 Luna: 54.7 (#24)
| Benchmark | Gemini 3.7 Flash | GPT-6 Luna |
|---|---|---|
| DeepSWE | 65.5% | 66.6% |
| FrontierCode | 43.6% | 42.4% |
| LMArena WebDev | 1593 | 1583 |
| LMArena Coding | 1499 | 1448 |
| FrontierSWE | 20.3% | — |
| SciCode | 59.8% | — |
| ALE-Bench | 904.3 | — |
Agentic & Tool Use Not comparable
Gemini 3.7 Flash: 42.2 (#18), GPT-6 Luna: —
| Benchmark | Gemini 3.7 Flash | GPT-6 Luna |
|---|---|---|
| APEX-Agents | 67.8% | — |
| Remote Labor Index | 5% | — |
| GDP.pdf | 23.8% | — |
Reasoning Gemini 3.7 Flash leads
Gemini 3.7 Flash: 70.1 (#12), GPT-6 Luna: 31.7 (#68)
| Benchmark | Gemini 3.7 Flash | GPT-6 Luna |
|---|---|---|
| NYT Connections (extended) | 94% | 68.7% |
| LMArena Hard Prompts | 1497 | 1415 |
| ARC-AGI-2 | 84.6% | — |
| ARC-AGI-1 | 95.5% | — |
| CritPt | 14.3% | — |
| Chess Puzzles | 47% | — |
| Mystery Game Puzzles | 37% | — |
| DTBench | 96.8% | — |
| LMCA | 50.4% | — |
| Epoch Capabilities Index | 157.72 | — |
Math Gemini 3.7 Flash leads
Gemini 3.7 Flash: 69.5 (#18), GPT-6 Luna: 35.6 (#140)
| Benchmark | Gemini 3.7 Flash | GPT-6 Luna |
|---|---|---|
| LMArena Math | 1511 | 1396 |
| FrontierMath (Tiers 1-3) | 71.6% | — |
| FrontierMath Tier 4 | 36.6% | — |
| OTIS Mock AIME 2024-2025 | 97.2% | — |
| ProofBench | 58% | — |
Knowledge Gemini 3.7 Flash leads
Gemini 3.7 Flash: 69.8 (#4), GPT-6 Luna: 40.1 (#110)
| Benchmark | Gemini 3.7 Flash | GPT-6 Luna |
|---|---|---|
| LMArena Expert | 1508 | 1458 |
| GPQA Diamond | 94.8% | — |
| SimpleQA Verified | 69.2% | — |
Multimodal GPT-6 Luna leads
Gemini 3.7 Flash: 36.9 (#69), GPT-6 Luna: 42.0 (#27)
| Benchmark | Gemini 3.7 Flash | GPT-6 Luna |
|---|---|---|
| Furniture Assembly | 26.7% | 44.2% |
| LMArena Vision | 1314 | — |
Multilingual Gemini 3.7 Flash leads
Gemini 3.7 Flash: 57.8 (#7), GPT-6 Luna: 51.0 (#111)
| Benchmark | Gemini 3.7 Flash | GPT-6 Luna |
|---|---|---|
| LMArena Non-English | 1485 | 1390 |
| LMArena Chinese | 1553 | 1425 |
| LMArena Russian | 1519 | 1392 |
| LMArena Spanish | 1507 | 1416 |
| LMArena French | 1512 | — |
| LMArena German | 1485 | — |
| LMArena Japanese | 1506 | — |
| LMArena Korean | 1486 | — |
Instruction Following Gemini 3.7 Flash leads
Gemini 3.7 Flash: 78.0 (#12), GPT-6 Luna: 74.7 (#85)
| Benchmark | Gemini 3.7 Flash | GPT-6 Luna |
|---|---|---|
| LMArena Instruction Following | 1486 | 1414 |
Long Context Gemini 3.7 Flash leads
Gemini 3.7 Flash: 45.8 (#28), GPT-6 Luna: 43.3 (#95)
| Benchmark | Gemini 3.7 Flash | GPT-6 Luna |
|---|---|---|
| LMArena Longer Query | 1493 | 1417 |
Writing & Preference Gemini 3.7 Flash leads
Gemini 3.7 Flash: 71.4 (#19), GPT-6 Luna: 58.4 (#115)
| Benchmark | Gemini 3.7 Flash | GPT-6 Luna |
|---|---|---|
| LMArena Text | 1487 | 1392 |
| LMArena Creative Writing | 1490 | 1357 |
| LMArena Multi-Turn | 1495 | 1400 |
| EQ-Bench Creative Writing | 1723 | — |
Frequently asked questions
Is Gemini 3.7 Flash better than GPT-6 Luna?
Gemini 3.7 Flash is the stronger model overall, scoring 59.8 to 45.1 on the Noometry Index. GPT-6 Luna costs 7.5× less per token, which makes it the better buy when Gemini 3.7 Flash's lead doesn't matter for your workload.
Which is cheaper, Gemini 3.7 Flash 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; Gemini 3.7 Flash lists at $0.75 and $3.75.
Is Gemini 3.7 Flash or GPT-6 Luna better for coding?
They score almost the same on coding (55.7 vs 54.7); test both on your own repository before choosing.
Which has the bigger context window?
GPT-6 Luna does, with 1.05M tokens against 1.05M.
How many benchmarks do Gemini 3.7 Flash and GPT-6 Luna share?
18 benchmarks have published results for both models. Gemini 3.7 Flash has 44 scored results on Noometry and GPT-6 Luna has 18.