Model comparison
Gemini 3.6 Flash vs GPT-5.5 Pro
GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 54.1 on the Noometry Index. Gemini 3.6 Flash costs 45× less per token, which makes it the better buy when GPT-5.5 Pro's lead doesn't matter for your workload.
Last verified . 11 shared benchmarks.
GoogleSummary
- They share 11 benchmarks with published results for both. Gemini 3.6 Flash scores higher in 1 category and GPT-5.5 Pro in 2 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in math, where GPT-5.5 Pro leads 83.8 to 57.0.
- The biggest single-benchmark swing is FrontierMath Tier 4: 22% for Gemini 3.6 Flash and 78% for GPT-5.5 Pro.
- Gemini 3.6 Flash is cheaper at $0.75 / $3.75 per million input/output tokens, against $30 / $180 for GPT-5.5 Pro.
- GPT-5.5 Pro accepts more context: 1.05M tokens versus 1.05M.
Side by side
| Gemini 3.6 Flash | GPT-5.5 Pro | |
|---|---|---|
| Provider | OpenAI | |
| Noometry Index | 54.1 | 64.3 |
| Released | 2026-07-21 | 2026-04-23 |
| Weights | Proprietary | Proprietary |
| Context window | 1.05M | 1.05M |
| Max output | 66K | 128K |
| Input $ / M tokens | $0.75 | $30 |
| Output $ / M tokens | $3.75 | $180 |
| Results tracked | 46 | 14 |
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Category by category
Coding Not comparable
Gemini 3.6 Flash: 49.6 (#45), GPT-5.5 Pro: —
| Benchmark | Gemini 3.6 Flash | GPT-5.5 Pro |
|---|---|---|
| DeepSWE | 46.7% | — |
| FrontierCode | 34.4% | — |
| LMArena WebDev | 1536 | — |
| SciCode | 52.7% | — |
| WeirdML | 56.1% | — |
| LMArena Coding | 1492 | — |
| ALE-Bench | 715.52 | — |
Agentic & Tool Use Not comparable
Gemini 3.6 Flash: 32.4 (#56), GPT-5.5 Pro: —
| Benchmark | Gemini 3.6 Flash | GPT-5.5 Pro |
|---|---|---|
| APEX-Agents | 46.9% | — |
| GDP.pdf | 14% | — |
Reasoning GPT-5.5 Pro leads
Gemini 3.6 Flash: 58.9 (#20), GPT-5.5 Pro: 73.6 (#7)
| Benchmark | Gemini 3.6 Flash | GPT-5.5 Pro |
|---|---|---|
| ARC-AGI-2 | 60.4% | 84.6% |
| ARC-AGI-1 | 91.2% | 96.5% |
| CritPt | 10.6% | 30.6% |
| Chess Puzzles | 43% | 64% |
| DTBench | 95.5% | 96% |
| LMCA | 44.9% | 53.9% |
| Epoch Capabilities Index | 154.36 | 162.45 |
| SimpleBench | — | 76.9% |
| NYT Connections (extended) | 89% | — |
| LMArena Hard Prompts | 1486 | — |
| Mystery Game Puzzles | 30% | — |
Math GPT-5.5 Pro leads
Gemini 3.6 Flash: 57.0 (#33), GPT-5.5 Pro: 83.8 (#8)
| Benchmark | Gemini 3.6 Flash | GPT-5.5 Pro |
|---|---|---|
| FrontierMath (Tiers 1-3) | 58.9% | 87.7% |
| FrontierMath Tier 4 | 22% | 78% |
| OTIS Mock AIME 2024-2025 | 94.2% | 100% |
| MathArena Final-Answer Competitions | 70.8% | — |
| ProofBench | 36% | — |
| LMArena Math | 1504 | — |
| FrontierMath (Feb 2025 set) | — | 52.4% |
| FrontierMath Tier 4 (v1) | — | 39.6% |
Knowledge Gemini 3.6 Flash leads
Gemini 3.6 Flash: 67.8 (#7), GPT-5.5 Pro: 64.2 (#17)
| Benchmark | Gemini 3.6 Flash | GPT-5.5 Pro |
|---|---|---|
| GPQA Diamond | 94.1% | 93.9% |
| SimpleQA Verified | 66.2% | — |
| LMArena Expert | 1489 | — |
Multimodal Not comparable
Gemini 3.6 Flash: 38.7 (#55), GPT-5.5 Pro: —
| Benchmark | Gemini 3.6 Flash | GPT-5.5 Pro |
|---|---|---|
| LMArena Vision | 1297 | — |
| Blueprint-Bench 2 | 31.2% | — |
| Furniture Assembly | 23.3% | — |
| LMArena Document | 1456 | — |
Multilingual Not comparable
Gemini 3.6 Flash: 56.8 (#17), GPT-5.5 Pro: —
| Benchmark | Gemini 3.6 Flash | GPT-5.5 Pro |
|---|---|---|
| LMArena Non-English | 1470 | — |
| LMArena Chinese | 1530 | — |
| LMArena French | 1501 | — |
| LMArena German | 1478 | — |
| LMArena Japanese | 1477 | — |
| LMArena Korean | 1435 | — |
| LMArena Russian | 1490 | — |
| LMArena Spanish | 1477 | — |
Instruction Following Not comparable
Gemini 3.6 Flash: 77.2 (#27), GPT-5.5 Pro: —
| Benchmark | Gemini 3.6 Flash | GPT-5.5 Pro |
|---|---|---|
| LMArena Instruction Following | 1467 | — |
Long Context Not comparable
Gemini 3.6 Flash: 45.1 (#47), GPT-5.5 Pro: —
| Benchmark | Gemini 3.6 Flash | GPT-5.5 Pro |
|---|---|---|
| LMArena Longer Query | 1475 | — |
Writing & Preference Not comparable
Gemini 3.6 Flash: 68.3 (#26), GPT-5.5 Pro: —
| Benchmark | Gemini 3.6 Flash | GPT-5.5 Pro |
|---|---|---|
| LMArena Text | 1478 | — |
| LMArena Creative Writing | 1464 | — |
| EQ-Bench Creative Writing | 1604 | — |
| LMArena Multi-Turn | 1481 | — |
Frequently asked questions
Is Gemini 3.6 Flash better than GPT-5.5 Pro?
GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 54.1 on the Noometry Index. Gemini 3.6 Flash costs 45× less per token, which makes it the better buy when GPT-5.5 Pro's lead doesn't matter for your workload.
Which is cheaper, Gemini 3.6 Flash or GPT-5.5 Pro?
Gemini 3.6 Flash is cheaper. It lists at $0.75 per million input tokens and $3.75 per million output tokens; GPT-5.5 Pro lists at $30 and $180.
Which has the bigger context window?
GPT-5.5 Pro does, with 1.05M tokens against 1.05M.
How many benchmarks do Gemini 3.6 Flash and GPT-5.5 Pro share?
11 benchmarks have published results for both models. Gemini 3.6 Flash has 46 scored results on Noometry and GPT-5.5 Pro has 14.