Model comparison
Gemini 3.6 Flash vs GPT-5.1
Gemini 3.6 Flash is the stronger model overall, scoring 54.1 to 49.0 on the Noometry Index.
Last verified . 34 shared benchmarks.
GoogleSummary
- They share 34 benchmarks with published results for both. Gemini 3.6 Flash scores higher in 6 categories and GPT-5.1 in 4 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Gemini 3.6 Flash leads 58.8 to 39.8.
- The biggest single-benchmark swing is ARC-AGI-2: 60.4% for Gemini 3.6 Flash and 17.6% for GPT-5.1.
- Gemini 3.6 Flash is cheaper at $0.75 / $3.75 per million input/output tokens, against $1.25 / $10 for GPT-5.1.
- Gemini 3.6 Flash accepts more context: 1.05M tokens versus 400K.
Side by side
| Gemini 3.6 Flash | GPT-5.1 | |
|---|---|---|
| Provider | OpenAI | |
| Noometry Index | 54.1 | 49.0 |
| Released | 2026-07-21 | 2025-11-13 |
| Weights | Proprietary | Proprietary |
| Context window | 1.05M | 400K |
| Max output | 66K | 128K |
| Input $ / M tokens | $0.75 | $1.25 |
| Output $ / M tokens | $3.75 | $10 |
| Results tracked | 46 | 63 |
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Category by category
Coding Gemini 3.6 Flash leads
Gemini 3.6 Flash: 50.0 (#48), GPT-5.1: 46.4 (#66)
| Benchmark | Gemini 3.6 Flash | GPT-5.1 |
|---|---|---|
| LMArena WebDev | 1538 | 1395 |
| SciCode | 52.7% | 43.3% |
| WeirdML | 56.1% | 60.8% |
| LMArena Coding | 1491 | 1454 |
| ALE-Bench | 715.52 | 1,192 |
| SWE-bench Verified | — | 68% |
| DeepSWE | 46.7% | — |
| FrontierCode | 34.4% | — |
| SWE-bench Verified (bash only) | — | 66% |
| GSO | — | 13.7% |
| LiveBench Coding | — | 72.5% |
Agentic & Tool Use Too close to call
Gemini 3.6 Flash: 32.3 (#65), GPT-5.1: 32.7 (#60)
| Benchmark | Gemini 3.6 Flash | GPT-5.1 |
|---|---|---|
| Terminal-Bench | — | 47.6% |
| APEX-Agents | 46.9% | — |
| DeepResearch Bench | — | 42.8% |
| GDP.pdf | 14% | — |
| LMArena Search | — | 1199 |
| Vending-Bench 2 | — | 1,473 |
Reasoning Gemini 3.6 Flash leads
Gemini 3.6 Flash: 58.8 (#22), GPT-5.1: 39.8 (#58)
| Benchmark | Gemini 3.6 Flash | GPT-5.1 |
|---|---|---|
| ARC-AGI-2 | 60.4% | 17.6% |
| ARC-AGI-1 | 91.2% | 72.8% |
| CritPt | 10.6% | 4.9% |
| Chess Puzzles | 43% | 32% |
| LMArena Hard Prompts | 1485 | 1457 |
| Mystery Game Puzzles | 30% | 19% |
| DTBench | 95.5% | 90.1% |
| LMCA | 44.9% | 43.9% |
| Epoch Capabilities Index | 154.25 | 149.64 |
| SimpleBench | — | 53.2% |
| NYT Connections (extended) | 89% | — |
| EnigmaEval | — | 11.2% |
| LiveBench Reasoning | — | 95.8% |
| LiveBench Data Analysis | — | 72.1% |
| ForecastBench | — | 58.1 |
| LiveBench | — | 78.8% |
Math Gemini 3.6 Flash leads
Gemini 3.6 Flash: 57.3 (#40), GPT-5.1: 52.2 (#51)
| Benchmark | Gemini 3.6 Flash | GPT-5.1 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 94.2% | 88.6% |
| LMArena Math | 1505 | 1447 |
| FrontierMath (Tiers 1-3) | 58.9% | — |
| FrontierMath Tier 4 | 22% | — |
| MathArena Final-Answer Competitions | 70.8% | — |
| ProofBench | 36% | — |
| Omni-MATH | — | 46.4% |
| LiveBench Math | — | 94.5% |
| FrontierMath (Feb 2025 set) | — | 31% |
| FrontierMath Tier 4 (v1) | — | 12.5% |
Knowledge Gemini 3.6 Flash leads
Gemini 3.6 Flash: 67.8 (#8), GPT-5.1: 50.6 (#71)
| Benchmark | Gemini 3.6 Flash | GPT-5.1 |
|---|---|---|
| GPQA Diamond | 94.1% | 87.6% |
| SimpleQA Verified | 66.2% | 48% |
| LMArena Expert | 1488 | 1470 |
| Humanity's Last Exam | — | 23.7% |
| MMLU-Pro | — | 57.9% |
| Vectara Hallucination Rate | — | 10.9% |
| GPQA (HELM) | — | 44.2% |
Multimodal GPT-5.1 leads
Gemini 3.6 Flash: 38.5 (#64), GPT-5.1: 44.8 (#19)
| Benchmark | Gemini 3.6 Flash | GPT-5.1 |
|---|---|---|
| LMArena Vision | 1298 | 1250 |
| LMArena Document | 1456 | 1403 |
| VPCT | — | 58.7% |
| Blueprint-Bench 2 | 31.2% | — |
| Furniture Assembly | 23.3% | — |
Multilingual Gemini 3.6 Flash leads
Gemini 3.6 Flash: 56.5 (#19), GPT-5.1: 53.8 (#56)
| Benchmark | Gemini 3.6 Flash | GPT-5.1 |
|---|---|---|
| LMArena Non-English | 1469 | 1431 |
| LMArena Chinese | 1531 | 1495 |
| LMArena French | 1504 | 1450 |
| LMArena German | 1478 | 1438 |
| LMArena Japanese | 1476 | 1453 |
| LMArena Korean | 1431 | 1401 |
| LMArena Russian | 1487 | 1435 |
| LMArena Spanish | 1475 | 1433 |
Instruction Following GPT-5.1 leads
Gemini 3.6 Flash: 77.0 (#33), GPT-5.1: 83.9 (#1)
| Benchmark | Gemini 3.6 Flash | GPT-5.1 |
|---|---|---|
| LMArena Instruction Following | 1466 | 1443 |
| LiveBench Instruction Following | — | 93.3% |
| IFEval | — | 93.5% |
Long Context GPT-5.1 leads
Gemini 3.6 Flash: 45.1 (#50), GPT-5.1: 47.6 (#14)
| Benchmark | Gemini 3.6 Flash | GPT-5.1 |
|---|---|---|
| LMArena Longer Query | 1474 | 1447 |
| CL-bench | — | 23.7% |
| CL-bench Life | — | 17.3% |
Writing & Preference Gemini 3.6 Flash leads
Gemini 3.6 Flash: 68.2 (#27), GPT-5.1: 64.5 (#55)
| Benchmark | Gemini 3.6 Flash | GPT-5.1 |
|---|---|---|
| LMArena Text | 1479 | 1443 |
| LMArena Creative Writing | 1465 | 1427 |
| LMArena Multi-Turn | 1481 | 1450 |
| EQ-Bench Creative Writing | 1604 | — |
| WildBench | — | 86.3% |
| LiveBench Language | — | 80.2% |
Frequently asked questions
Is Gemini 3.6 Flash better than GPT-5.1?
Gemini 3.6 Flash is the stronger model overall, scoring 54.1 to 49.0 on the Noometry Index.
Which is cheaper, Gemini 3.6 Flash or GPT-5.1?
Gemini 3.6 Flash is cheaper. It lists at $0.75 per million input tokens and $3.75 per million output tokens; GPT-5.1 lists at $1.25 and $10.
Is Gemini 3.6 Flash or GPT-5.1 better for coding?
Gemini 3.6 Flash scores higher on coding benchmarks: 50.0 versus 46.4 in the Noometry coding category.
Which has the bigger context window?
Gemini 3.6 Flash does, with 1.05M tokens against 400K.
How many benchmarks do Gemini 3.6 Flash and GPT-5.1 share?
34 benchmarks have published results for both models. Gemini 3.6 Flash has 46 scored results on Noometry and GPT-5.1 has 63.