Model comparison
Gemini 3.1 Flash Lite vs GPT-5 Mini
GPT-5 Mini is the stronger model overall, scoring 41.8 to 40.8 on the Noometry Index.
Last verified . 34 shared benchmarks.
GoogleSummary
- They share 34 benchmarks with published results for both. Gemini 3.1 Flash Lite scores higher in 4 categories and GPT-5 Mini in 6 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where GPT-5 Mini leads 46.7 to 40.7.
- The biggest single-benchmark swing is FrontierMath (Tiers 1-3): 27.7% for Gemini 3.1 Flash Lite and 46.7% for GPT-5 Mini.
- Gemini 3.1 Flash Lite is cheaper at $0.25 / $1.50 per million input/output tokens, against $0.25 / $2 for GPT-5 Mini.
- Gemini 3.1 Flash Lite accepts more context: 1.05M tokens versus 400K.
Side by side
| Gemini 3.1 Flash Lite | GPT-5 Mini | |
|---|---|---|
| Provider | OpenAI | |
| Noometry Index | 40.8 | 41.8 |
| Released | 2026-03-03 | 2025-08-07 |
| Weights | Proprietary | Proprietary |
| Context window | 1.05M | 400K |
| Max output | 66K | 128K |
| Input $ / M tokens | $0.25 | $0.25 |
| Output $ / M tokens | $1.50 | $2 |
| Results tracked | 38 | 60 |
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Category by category
Coding GPT-5 Mini leads
Gemini 3.1 Flash Lite: 37.8 (#188), GPT-5 Mini: 40.1 (#146)
| Benchmark | Gemini 3.1 Flash Lite | GPT-5 Mini |
|---|---|---|
| SciCode | 41.9% | 39.2% |
| WeirdML | 52.2% | 52.7% |
| LMArena Coding | 1400 | 1406 |
| ALE-Bench | 797.73 | 799.77 |
| SWE-bench Verified | — | 64.7% |
| SWE-bench Verified (bash only) | — | 59.8% |
| LMArena WebDev | 1256 | — |
| SWE-bench Multilingual | — | 39.7% |
| AlgoTune | — | 1.38 |
Agentic & Tool Use Too close to call
Gemini 3.1 Flash Lite: 30.2 (#79), GPT-5 Mini: 31.1 (#70)
| Benchmark | Gemini 3.1 Flash Lite | GPT-5 Mini |
|---|---|---|
| Terminal-Bench | — | 34.8% |
| Berkeley Function Calling Leaderboard | — | 55.5% |
| DeepResearch Bench | 37.3% | — |
| Vending-Bench 2 | — | -31.18 |
Reasoning GPT-5 Mini leads
Gemini 3.1 Flash Lite: 22.9 (#186), GPT-5 Mini: 23.9 (#168)
| Benchmark | Gemini 3.1 Flash Lite | GPT-5 Mini |
|---|---|---|
| Kagi LLM Benchmark | 67.2% | 70.3% |
| CritPt | 1.1% | 0% |
| Chess Puzzles | 25% | 30% |
| EnigmaEval | 3% | 8.2% |
| LMArena Hard Prompts | 1407 | 1380 |
| DTBench | 76.8% | 80.5% |
| LMCA | 35% | 34.2% |
| Epoch Capabilities Index | 144.47 | 145.52 |
| ForecastBench | 54.4 | 61 |
| ARC-AGI-2 | — | 4.4% |
| NYT Connections (extended) | 8.2% | — |
| ARC-AGI-1 | — | 54.3% |
| Thematic Generalization | 63.3% | — |
| Mystery Game Puzzles | — | 10% |
Math GPT-5 Mini leads
Gemini 3.1 Flash Lite: 40.7 (#90), GPT-5 Mini: 46.7 (#69)
| Benchmark | Gemini 3.1 Flash Lite | GPT-5 Mini |
|---|---|---|
| FrontierMath (Tiers 1-3) | 27.7% | 46.7% |
| OTIS Mock AIME 2024-2025 | 80% | 86.7% |
| LMArena Math | 1428 | 1378 |
| FrontierMath Tier 4 | — | 12.2% |
| ProofBench | — | 9% |
| Omni-MATH | — | 72.2% |
| MATH Level 5 | — | 97.8% |
| FrontierMath (Feb 2025 set) | — | 27.2% |
| FrontierMath Tier 4 (v1) | — | 6.3% |
Knowledge GPT-5 Mini leads
Gemini 3.1 Flash Lite: 41.9 (#104), GPT-5 Mini: 45.6 (#86)
| Benchmark | Gemini 3.1 Flash Lite | GPT-5 Mini |
|---|---|---|
| GPQA Diamond | 81.8% | 75% |
| Humanity's Last Exam | 8.6% | 19.4% |
| Vectara Hallucination Rate | 8.2% | 12.9% |
| LMArena Expert | 1398 | 1379 |
| SimpleQA Verified | — | 21.6% |
| MMLU-Pro | — | 83.5% |
| Confabulations | — | 13.3% |
| GPQA (HELM) | — | 75.6% |
Multimodal Gemini 3.1 Flash Lite leads
Gemini 3.1 Flash Lite: 39.4 (#60), GPT-5 Mini: 35.6 (#85)
| Benchmark | Gemini 3.1 Flash Lite | GPT-5 Mini |
|---|---|---|
| LMArena Vision | 1240 | 1202 |
| VPCT | — | 40.2% |
Multilingual Gemini 3.1 Flash Lite leads
Gemini 3.1 Flash Lite: 52.3 (#86), GPT-5 Mini: 48.9 (#137)
| Benchmark | Gemini 3.1 Flash Lite | GPT-5 Mini |
|---|---|---|
| LMArena Non-English | 1411 | 1363 |
| LMArena Chinese | 1461 | 1385 |
| LMArena French | 1424 | 1386 |
| LMArena German | 1429 | 1366 |
| LMArena Japanese | 1413 | 1341 |
| LMArena Korean | 1392 | 1308 |
| LMArena Russian | 1420 | 1362 |
| LMArena Spanish | 1421 | 1355 |
Instruction Following GPT-5 Mini leads
Gemini 3.1 Flash Lite: 72.7 (#131), GPT-5 Mini: 76.2 (#46)
| Benchmark | Gemini 3.1 Flash Lite | GPT-5 Mini |
|---|---|---|
| LMArena Instruction Following | 1377 | 1357 |
| IFEval | — | 92.7% |
Long Context Too close to call
Gemini 3.1 Flash Lite: 42.5 (#122), GPT-5 Mini: 41.9 (#132)
| Benchmark | Gemini 3.1 Flash Lite | GPT-5 Mini |
|---|---|---|
| LMArena Longer Query | 1394 | 1355 |
| Fiction.LiveBench | — | 69.4% |
Writing & Preference Gemini 3.1 Flash Lite leads
Gemini 3.1 Flash Lite: 60.9 (#94), GPT-5 Mini: 55.2 (#148)
| Benchmark | Gemini 3.1 Flash Lite | GPT-5 Mini |
|---|---|---|
| LMArena Text | 1416 | 1373 |
| LMArena Creative Writing | 1401 | 1325 |
| LMArena Multi-Turn | 1417 | 1363 |
| Short-Story Creative Writing | — | 83.1% |
| EQ-Bench Creative Writing | — | 1313 |
| WildBench | — | 85.5% |
Frequently asked questions
Is Gemini 3.1 Flash Lite better than GPT-5 Mini?
GPT-5 Mini is the stronger model overall, scoring 41.8 to 40.8 on the Noometry Index.
Which is cheaper, Gemini 3.1 Flash Lite or GPT-5 Mini?
Gemini 3.1 Flash Lite is cheaper. It lists at $0.25 per million input tokens and $1.50 per million output tokens; GPT-5 Mini lists at $0.25 and $2.
Is Gemini 3.1 Flash Lite or GPT-5 Mini better for coding?
GPT-5 Mini scores higher on coding benchmarks: 40.1 versus 37.8 in the Noometry coding category.
Which has the bigger context window?
Gemini 3.1 Flash Lite does, with 1.05M tokens against 400K.
How many benchmarks do Gemini 3.1 Flash Lite and GPT-5 Mini share?
34 benchmarks have published results for both models. Gemini 3.1 Flash Lite has 38 scored results on Noometry and GPT-5 Mini has 60.