Gemini 3.1 Flash Lite Preview vs o4 Mini
Updated October 21, 2026. 57 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.
Decision reading
Pick o4 Mini for coding: it scores 68.6 on the Vibe Coding Index against 8.1 for Gemini 3.1 Flash Lite Preview.
Pick Gemini 3.1 Flash Lite Preview when output tokens cost 2.9x less, or when the context window is larger, 1.05M against 200K tokens.
- Shared results
- 57
- Gemini 3.1 Flash Lite Preview only
- 20
- o4 Mini only
- 37
- Like-for-like categories
- 7 of 9
Shared results can support a head-to-head reading. Results only one model has describe coverage, not superiority.
Which one for your work
Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.
Coding
Vibe Coding Index, four public coding benchmarks
o4 Mini
o4 Mini scores 68.6 against 8.1.
1 and 2 benchmarks behind the scores
Intelligence
AA Intelligence Index
o4 Mini
o4 Mini leads, 16.7 against 15.6.
Same board, both measured
Agentic work
AA Agentic Index
No call
Only Gemini 3.1 Flash Lite Preview has a AA Agentic Index result, 1.6.
Directional only
Reasoning
GPQA Diamond
Gemini 3.1 Flash Lite Preview
Gemini 3.1 Flash Lite Preview leads, 81.1% against 74.5%.
Same board, both measured
Math
AIME
o4 Mini
o4 Mini leads, 83.7% against 83.3%.
Same board, both measured
Knowledge
MMLU Pro
Gemini 3.1 Flash Lite Preview
Gemini 3.1 Flash Lite Preview leads, 86.2% against 80.6%.
Same board, both measured
Web design
Design Arena: websites
Gemini 3.1 Flash Lite Preview
Gemini 3.1 Flash Lite Preview leads, 1083 against 985.
Same board, both measured
Long documents
Listed context window
Gemini 3.1 Flash Lite Preview
Gemini 3.1 Flash Lite Preview takes 1.05M tokens against 200K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Gemini 3.1 Flash Lite Preview
Gemini 3.1 Flash Lite Preview $0.0010, o4 Mini $0.0033 per turn.
List prices
Cost per solved task
One SWE-bench Verified task, solved
No call
Only Gemini 3.1 Flash Lite Preview has the number, $0.18.
Directional only
At a glance
- Coding index
- Gemini 3.1 Flash Lite Preview 8.1 from 1 benchmark, o4 Mini 68.6 from 2 benchmarks.
- Widest category
- General, 11.8 points apart on average over 27 shared benchmarks.
- Widest single gap
- Design Arena: 3D: Gemini 3.1 Flash Lite Preview 1048 against o4 Mini 854, 24.3 points apart on a 0 to 100 scale.
- Output price
- Gemini 3.1 Flash Lite Preview $1.50 against o4 Mini $4.40 per million output tokens, 2.9x apart.
- Context window
- Gemini 3.1 Flash Lite Preview takes 1.05M tokens, o4 Mini 200K.
Benchmark by benchmark
First the score: boards each model leads, per category, where both have a result. Then every board, a category to a fold; bars are each result on a 0 to 100 scale, so compare the two in a row, not one row with another.
| Category | Gemini 3.1 Flash Lite Preview | Bars | o4 Mini | Ties |
|---|---|---|---|---|
| Coding | 2 | 1 | ||
| Intelligence | 0 | 1 | ||
| Reasoning | 7 | 0 | ||
| Math | 2 | 1 | ||
| Knowledge | 9 | 1 | ||
| Web design | 6 | 0 | ||
| General | 26 | 1 | ||
| All shared boards | 52 | 5 |
CodingLike-for-likeFour of these boards feed the Vibe Coding Index21
| Benchmark | Gemini 3.1 Flash Lite Preview | o4 Mini | Leader |
|---|---|---|---|
| Aider polyglot | Not measured | 72.0% | Only o4 Mini measured |
| SWE-bench Verified | Not measured | 64.6% | Only o4 Mini measured |
| SWE-bench Multimodal | Not measured | 33.9% | Only o4 Mini measured |
| LMArena WebDev | 1257 | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| AA Coding Index | 34.7 | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| LiveCodeBench (Vals AI) | 80.1% | 82.2% | o4 Mini |
| SWE-bench Verified (Vals AI) | 62.8% | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| Vibe Code Bench (Vals AI) | 0.0% | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| Code migration (Vals AI) | 4.6% | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| ProgramBench (Vals AI) | 0.0% | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| Terminal-Bench 2.1 (Vals AI) | 34.1% | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| LiveCodeBench (Artificial Analysis run) | Not measured | 85.9% | Only o4 Mini measured |
| Terminal-Bench Hard (Artificial Analysis run) | Not measured | 15.2% | Only o4 Mini measured |
| GSO-Bench | Not measured | 3.6% | Only o4 Mini measured |
| WeirdML | Not measured | 52.6% | Only o4 Mini measured |
| ALE-Bench | 797.7 | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| LMArena Text: coding | 1400 | 1368 | Gemini 3.1 Flash Lite Preview |
| LMArena Text: software and IT | 1413 | 1367 | Gemini 3.1 Flash Lite Preview |
| LMArena WebDev: React | 1245 | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| LMArena WebDev: HTML | 1276 | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| LMArena WebDev: from an image | 1336 | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| Neither model has a result on the other 17 boards here | |||
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index01
| Benchmark | Gemini 3.1 Flash Lite Preview | o4 Mini | Leader |
|---|---|---|---|
| AA Intelligence Index | 15.6 | 16.7 | o4 Mini |
| Epoch Capabilities Index | Not measured | 145.5 | Only o4 Mini measured |
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index7 boards, none shared
| Benchmark | Gemini 3.1 Flash Lite Preview | o4 Mini | Leader |
|---|---|---|---|
| AA Agentic Index | 1.6 | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| Finance Agent (Vals AI) | 30.0% | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| Tax Agent Bench (Vals AI) | 3.1% | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| Legal Research Bench (Vals AI) | 3.4% | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| Excel Modeling Benchmark (Vals AI) | 8.6% | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| τ²-Bench Telecom | Not measured | 55.6% | Only o4 Mini measured |
| METR time horizons | Not measured | 63.9% | Only o4 Mini measured |
| Neither model has a result on the other 32 boards here | |||
ReasoningLike-for-likePublic boards, shown as published, kept out of the index70
| Benchmark | Gemini 3.1 Flash Lite Preview | o4 Mini | Leader |
|---|---|---|---|
| GPQA Diamond | 81.1% | 74.5% | Gemini 3.1 Flash Lite Preview |
| MMMU Pro (Vals AI) | 82.5% | 79.7% | Gemini 3.1 Flash Lite Preview |
| GPQA Diamond (Artificial Analysis run) | Not measured | 78.4% | Only o4 Mini measured |
| Humanity's Last Exam (Artificial Analysis run) | Not measured | 16.5% | Only o4 Mini measured |
| GPQA Diamond (Epoch AI run) | Not measured | 79.6% | Only o4 Mini measured |
| ARC-AGI | Not measured | 58.7% | Only o4 Mini measured |
| ARC-AGI-2 | Not measured | 6.1% | Only o4 Mini measured |
| SimpleBench | Not measured | 38.7% | Only o4 Mini measured |
| Chess puzzles | Not measured | 22.0% | Only o4 Mini measured |
| Mystery game puzzles | Not measured | 5.0% | Only o4 Mini measured |
| VPCT | Not measured | 57.5% | Only o4 Mini measured |
| LMArena Text: hard prompts | 1407 | 1351 | Gemini 3.1 Flash Lite Preview |
| LMArena Text: expert | 1398 | 1343 | Gemini 3.1 Flash Lite Preview |
| LMArena Text: hard prompts in English | 1403 | 1366 | Gemini 3.1 Flash Lite Preview |
| LMArena Vision: diagrams | 1242 | 1197 | Gemini 3.1 Flash Lite Preview |
| LMArena Vision: homework | 1271 | 1234 | Gemini 3.1 Flash Lite Preview |
| Neither model has a result on the other 5 boards here | |||
MathLike-for-likePublic boards, shown as published, kept out of the index21
| Benchmark | Gemini 3.1 Flash Lite Preview | o4 Mini | Leader |
|---|---|---|---|
| AIME | 83.3% | 83.7% | o4 Mini |
| MATH 500 (Vals AI) | Not measured | 94.2% | Only o4 Mini measured |
| MGSM (Vals AI) | Not measured | 93.4% | Only o4 Mini measured |
| AA Math Index | Not measured | 90.7 | Only o4 Mini measured |
| AIME 2025 (Artificial Analysis run) | Not measured | 90.7% | Only o4 Mini measured |
| OTIS Mock AIME | Not measured | 81.7% | Only o4 Mini measured |
| FrontierMath, tiers 1 to 3 | Not measured | 36.1% | Only o4 Mini measured |
| FrontierMath, tier 4 | Not measured | 4.9% | Only o4 Mini measured |
| MATH level 5 | Not measured | 97.8% | Only o4 Mini measured |
| LMArena Text: math | 1428 | 1389 | Gemini 3.1 Flash Lite Preview |
| LMArena Text: mathematical work | 1417 | 1379 | Gemini 3.1 Flash Lite Preview |
| Neither model has a result on the other 2 boards here | |||
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index91
| Benchmark | Gemini 3.1 Flash Lite Preview | o4 Mini | Leader |
|---|---|---|---|
| MMLU Pro | 86.2% | 80.6% | Gemini 3.1 Flash Lite Preview |
| LegalBench (Vals AI) | 83.8% | 79.2% | Gemini 3.1 Flash Lite Preview |
| CaseLaw (Vals AI) | 55.0% | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| CorpFin (Vals AI) | 59.4% | 59.0% | Gemini 3.1 Flash Lite Preview |
| TaxEval (Vals AI) | 71.8% | 74.8% | o4 Mini |
| MortgageTax (Vals AI) | 68.0% | 64.8% | Gemini 3.1 Flash Lite Preview |
| MedQA (Vals AI) | Not measured | 96.0% | Only o4 Mini measured |
| MedCode (Vals AI) | 47.6% | 33.8% | Gemini 3.1 Flash Lite Preview |
| MMLU Pro (Artificial Analysis run) | Not measured | 83.2% | Only o4 Mini measured |
| SimpleQA Verified | Not measured | 19.6% | Only o4 Mini measured |
| GeoBench | Not measured | 64.0% | Only o4 Mini measured |
| LMArena Text: science | 1425 | 1354 | Gemini 3.1 Flash Lite Preview |
| LMArena Text: medicine and healthcare | 1428 | 1361 | Gemini 3.1 Flash Lite Preview |
| LMArena Text: legal and government | 1418 | 1350 | Gemini 3.1 Flash Lite Preview |
| LMArena Text: business and finance | 1389 | 1325 | Gemini 3.1 Flash Lite Preview |
| Neither model has a result on the other 2 boards here | |||
Web designLike-for-likePublic boards, shown as published, kept out of the index60
| Benchmark | Gemini 3.1 Flash Lite Preview | o4 Mini | Leader |
|---|---|---|---|
| Design Arena: websites | 1083 | 985 | Gemini 3.1 Flash Lite Preview |
| Design Arena: UI components | 1071 | 983 | Gemini 3.1 Flash Lite Preview |
| Design Arena: game dev | 1029 | 1004 | Gemini 3.1 Flash Lite Preview |
| Design Arena: data viz | 1045 | 990 | Gemini 3.1 Flash Lite Preview |
| Design Arena: 3D | 1048 | 854 | Gemini 3.1 Flash Lite Preview |
| Design Arena: all code categories | 1072 | 977 | Gemini 3.1 Flash Lite Preview |
| Design Arena: SVG | 1052 | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| Design Arena: ASCII art | 1166 | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| Neither model has a result on the other 1 board here | |||
GeneralLike-for-likePublic boards, shown as published, kept out of the index261
| Benchmark | Gemini 3.1 Flash Lite Preview | o4 Mini | Leader |
|---|---|---|---|
| SAGE (Vals AI) | 49.5% | 41.1% | Gemini 3.1 Flash Lite Preview |
| MedScribe (Vals AI) | 63.9% | 69.1% | o4 Mini |
| Vals Multimodal Index | 41.4% | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| IFBench | Not measured | 68.7% | Only o4 Mini measured |
| Long context reasoning (AA-LCR) | Not measured | 61.0% | Only o4 Mini measured |
| DTBench | Not measured | 77.6% | Only o4 Mini measured |
| LMCA | Not measured | 26.5% | Only o4 Mini measured |
| Fiction.LiveBench | Not measured | 77.8% | Only o4 Mini measured |
| Creative writing (Lech Mazur) | Not measured | 75.0% | Only o4 Mini measured |
| LMArena Text | 1416 | 1353 | Gemini 3.1 Flash Lite Preview |
| LMArena Text: instruction following | 1377 | 1320 | Gemini 3.1 Flash Lite Preview |
| LMArena Text: creative writing | 1401 | 1294 | Gemini 3.1 Flash Lite Preview |
| LMArena Vision | 1240 | 1194 | Gemini 3.1 Flash Lite Preview |
| LMArena Text: English | 1414 | 1367 | Gemini 3.1 Flash Lite Preview |
| LMArena Text: non-English | 1410 | 1337 | Gemini 3.1 Flash Lite Preview |
| LMArena Text: Chinese | 1460 | 1354 | Gemini 3.1 Flash Lite Preview |
| LMArena Text: German | 1430 | 1336 | Gemini 3.1 Flash Lite Preview |
| LMArena Text: Japanese | 1413 | 1308 | Gemini 3.1 Flash Lite Preview |
| LMArena Text: Korean | 1392 | 1312 | Gemini 3.1 Flash Lite Preview |
| LMArena Text: French | 1424 | 1364 | Gemini 3.1 Flash Lite Preview |
| LMArena Text: Spanish | 1421 | 1346 | Gemini 3.1 Flash Lite Preview |
| LMArena Text: Russian | 1420 | 1334 | Gemini 3.1 Flash Lite Preview |
| LMArena Text: Polish | 1443 | 1358 | Gemini 3.1 Flash Lite Preview |
| LMArena Text: multi-turn | 1417 | 1350 | Gemini 3.1 Flash Lite Preview |
| LMArena Text: longer queries | 1394 | 1315 | Gemini 3.1 Flash Lite Preview |
| LMArena Text: writing and language | 1408 | 1316 | Gemini 3.1 Flash Lite Preview |
| LMArena Text: entertainment and media | 1386 | 1308 | Gemini 3.1 Flash Lite Preview |
| LMArena Vision: English | 1232 | 1200 | Gemini 3.1 Flash Lite Preview |
| LMArena Vision: Chinese | 1278 | 1218 | Gemini 3.1 Flash Lite Preview |
| LMArena Vision: reading text | 1246 | 1197 | Gemini 3.1 Flash Lite Preview |
| LMArena Vision: humor | 1266 | 1199 | Gemini 3.1 Flash Lite Preview |
| LMArena Vision: captioning | 1259 | 1204 | Gemini 3.1 Flash Lite Preview |
| LMArena Vision: recognizing things | 1308 | 1218 | Gemini 3.1 Flash Lite Preview |
| LMArena Vision: creative writing | 1248 | 1166 | Gemini 3.1 Flash Lite Preview |
| Neither model has a result on the other 12 boards here | |||
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Gemini 3.1 Flash Lite Preview | o4 Mini | Leader |
|---|---|---|---|
| Neither model has a result on 5 boards here | |||
What each workload costs
Three fixed token mixes at each model's listed price, so per-token rates become a bill.
Chat turn
1K input + 500 output tokens
Gemini 3.1 Flash Lite Preview costs less
Repository review
50K input + 3K output tokens
Gemini 3.1 Flash Lite Preview costs less
Agent loop
200K input + 10K output tokens
Gemini 3.1 Flash Lite Preview costs less
Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.
Specification differences
The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.
| Specification | Google Gemini 3.1 Flash Lite Preview | OpenAI o4 Mini |
|---|---|---|
| Maker | OpenAI | |
| Weights | No public weights listed | No public weights listed |
| Released | March 3, 2026 | April 16, 2025 |
| Context window | 1.05M | 200K |
| Input $/Mtok | $0.25 | $1.10 |
| Output $/Mtok | $1.50 | $4.40 |
| Coding index | 8.1 | 68.6 |
| Independent measurements behind it | 1 | 2 |
| Cost per solved task | $0.18 | Not computable |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Gemini 3.1 Flash Lite Preview better than o4 Mini for coding?
Pick o4 Mini for coding: it scores 68.6 on the Vibe Coding Index against 8.1 for Gemini 3.1 Flash Lite Preview. Pick Gemini 3.1 Flash Lite Preview when output tokens cost 2.9x less, or when the context window is larger, 1.05M against 200K tokens.
Which is cheaper, Gemini 3.1 Flash Lite Preview or o4 Mini?
Gemini 3.1 Flash Lite Preview costs $0.25 per million input tokens and $1.50 per million output tokens; o4 Mini costs $1.10 and $4.40. Cost per solved task is known for Gemini 3.1 Flash Lite Preview only.
Which has the bigger context window, Gemini 3.1 Flash Lite Preview or o4 Mini?
Gemini 3.1 Flash Lite Preview, with 1.05M tokens against 200K.
How many benchmarks is the Gemini 3.1 Flash Lite Preview vs o4 Mini comparison based on?
57 benchmarks have a result for both models as of October 21, 2026. Gemini 3.1 Flash Lite Preview's coding index rests on 1 independent benchmark and o4 Mini's on 2. Where only one model has a result, the page says so instead of naming a winner.