Gemini 3.1 Flash Lite Preview vs GPT-6.1 Sol
GPT-6.1 Sol leads Gemini 3.1 Flash Lite Preview on coding, 82.4 to 22.7 on the Vibe Coding Index, and Gemini 3.1 Flash Lite Preview costs 6.7x less per output token ($1.50 vs $10.00 per million). Updated October 22, 2026; 55 benchmarks have a result for both.
Gemini 3.1 Flash Lite Preview or GPT-6.1 Sol: which to pick
Pick GPT-6.1 Sol for coding: it scores 82.4 on the Vibe Coding Index against 22.7 for Gemini 3.1 Flash Lite Preview.
Pick Gemini 3.1 Flash Lite Preview for output tokens 6.7x cheaper ($1.50 vs $10.00 per million) and work measured by SAGE (Vals AI), where it leads.
- Shared results
- 55
- Gemini 3.1 Flash Lite Preview only
- 25
- GPT-6.1 Sol only
- 48
- Like-for-like categories
- 8 of 9
Only benchmarks that tested both models count toward a pick; a result only one model has is shown but not compared.
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, six public coding benchmarks
GPT-6.1 Sol
GPT-6.1 Sol scores 82.4 against 22.7.
3 and 5 benchmarks behind the scores
Intelligence
AA Intelligence Index
GPT-6.1 Sol
GPT-6.1 Sol leads, 51.8 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
No call
Only Gemini 3.1 Flash Lite Preview has a GPQA Diamond result, 81.1%.
Directional only
Math
AIME
No call
Only Gemini 3.1 Flash Lite Preview has a AIME result, 83.3%.
Directional only
Knowledge
MMLU Pro
No call
Only Gemini 3.1 Flash Lite Preview has a MMLU Pro result, 86.2%.
Directional only
Web design
Design Arena: websites
GPT-6.1 Sol
GPT-6.1 Sol leads, 1321 against 1082.
Same board, both measured
General
Vals Index
No call
Only GPT-6.1 Sol has a Vals Index result, 63.9%.
Directional only
Long documents
Listed context window
GPT-6.1 Sol
GPT-6.1 Sol takes 1.05M tokens against 1.05M.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Gemini 3.1 Flash Lite Preview
Gemini 3.1 Flash Lite Preview $0.0010, GPT-6.1 Sol $0.0070 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 22.7 from 3 benchmarks, GPT-6.1 Sol 82.4 from 5 benchmarks.
- Widest category
- Coding, 43.0 points apart on average over 11 shared benchmarks.
- Widest single gap
- Vibe Code Bench (Vals AI): Gemini 3.1 Flash Lite Preview 0.0% against GPT-6.1 Sol 88.9%, 88.9 points apart on a 0 to 100 scale.
- Output price
- Gemini 3.1 Flash Lite Preview $1.50 against GPT-6.1 Sol $10.00 per million output tokens, 6.7x apart.
- Context window
- Gemini 3.1 Flash Lite Preview takes 1.05M tokens, GPT-6.1 Sol 1.05M.
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 | GPT-6.1 Sol | Ties |
|---|---|---|---|---|
| Coding | 0 | 11 | ||
| Intelligence | 0 | 1 | ||
| Agentic work | 0 | 4 | ||
| Reasoning | 0 | 5 | ||
| Math | 0 | 2 | ||
| Knowledge | 0 | 6 | ||
| Web design | 0 | 6 | ||
| General | 1 | 19 | ||
| All shared boards | 1 | 54 |
CodingLike-for-likeSix of these boards feed the Vibe Coding Index011
| Benchmark | Gemini 3.1 Flash Lite Preview | GPT-6.1 Sol | Leader |
|---|---|---|---|
| LiveBench coding | Not measured | 96.0% | Only GPT-6.1 Sol measured |
| LMArena WebDev | 1257 | 1753 | GPT-6.1 Sol |
| AA Coding Index | 34.7 | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| LiveCodeBench (Vals AI) | 80.1% | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| SWE-bench Verified (Vals AI) | 62.8% | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| Terminal-Bench 4 (Vals AI) | Not measured | 55.0% | Only GPT-6.1 Sol measured |
| Vibe Code Bench (Vals AI) | 0.0% | 88.9% | GPT-6.1 Sol |
| Code migration (Vals AI) | 4.6% | 65.1% | GPT-6.1 Sol |
| ProgramBench (Vals AI) | 0.0% | 3.0% | GPT-6.1 Sol |
| IOI (Vals AI) | Not measured | 96.9% | Only GPT-6.1 Sol measured |
| Terminal-Bench 2.1 (Vals AI) | 34.1% | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| SWE-bench Multimodal (Vals AI) | Not measured | 43.5% | Only GPT-6.1 Sol measured |
| CyberBench (Vals AI) | Not measured | 39.3% | Only GPT-6.1 Sol measured |
| SciCode | Not measured | 55.8% | Only GPT-6.1 Sol measured |
| FrontierCode | Not measured | 50.2% | Only GPT-6.1 Sol measured |
| ALE-Bench | 797.7 | 2743.8 | GPT-6.1 Sol |
| LMArena Text: coding | 1400 | 1478 | GPT-6.1 Sol |
| LMArena Text: software and IT | 1413 | 1476 | GPT-6.1 Sol |
| LMArena WebDev: React | 1245 | 1754 | GPT-6.1 Sol |
| LMArena WebDev: HTML | 1276 | 1800 | GPT-6.1 Sol |
| LMArena WebDev: from an image | 1336 | 1702 | GPT-6.1 Sol |
| SciCode | 4.6% | 9.2% | GPT-6.1 Sol |
| SWE-Bench Pro V2 | Not measured | 96.1% | Only GPT-6.1 Sol measured |
| Neither model has a result on the other 20 boards here | |||
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index01
| Benchmark | Gemini 3.1 Flash Lite Preview | GPT-6.1 Sol | Leader |
|---|---|---|---|
| AA Intelligence Index | 15.6 | 51.8 | GPT-6.1 Sol |
| Epoch Capabilities Index | Not measured | 168.4 | Only GPT-6.1 Sol measured |
Agentic workLike-for-likePublic boards, shown as published, kept out of the index04
| Benchmark | Gemini 3.1 Flash Lite Preview | GPT-6.1 Sol | Leader |
|---|---|---|---|
| AA Agentic Index | 1.6 | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| Design Arena: agents building web apps | Not measured | 1307 | Only GPT-6.1 Sol measured |
| Design Arena: agents building mobile apps | Not measured | 1224 | Only GPT-6.1 Sol measured |
| Design Arena: spreadsheets | Not measured | 1270 | Only GPT-6.1 Sol measured |
| LiveBench research | Not measured | 83.5% | Only GPT-6.1 Sol measured |
| LiveBench browser | Not measured | 88.0% | Only GPT-6.1 Sol measured |
| LiveBench long agentic | Not measured | 73.0% | Only GPT-6.1 Sol measured |
| SREBench (Vals AI) | Not measured | 50.8% | Only GPT-6.1 Sol measured |
| Finance Agent (Vals AI) | 30.0% | 52.0% | GPT-6.1 Sol |
| Tax Agent Bench (Vals AI) | 3.1% | 21.8% | GPT-6.1 Sol |
| Legal Research Bench (Vals AI) | 3.4% | 38.5% | GPT-6.1 Sol |
| Harvey's Legal Agent Benchmark (Vals AI) | Not measured | 6.3% | Only GPT-6.1 Sol measured |
| Excel Modeling Benchmark (Vals AI) | 8.6% | 70.8% | GPT-6.1 Sol |
| BioMysteryBench (Vals AI) | Not measured | 79.6% | Only GPT-6.1 Sol measured |
| Terminal-Bench-Science (Vals AI) | Not measured | 52.9% | Only GPT-6.1 Sol measured |
| Vals Science Index | Not measured | 59.6% | Only GPT-6.1 Sol measured |
| Robo-bench (Vals AI) | Not measured | 28.3% | Only GPT-6.1 Sol measured |
| APEX-Agents | Not measured | 60.0% | Only GPT-6.1 Sol measured |
| SpireClimb | Not measured | 24.7% | Only GPT-6.1 Sol measured |
| Neither model has a result on the other 23 boards here | |||
ReasoningLike-for-likePublic boards, shown as published, kept out of the index05
| Benchmark | Gemini 3.1 Flash Lite Preview | GPT-6.1 Sol | Leader |
|---|---|---|---|
| GPQA Diamond | 81.1% | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| LiveBench reasoning | Not measured | 92.6% | Only GPT-6.1 Sol measured |
| MysteryMechanism (Vals AI) | Not measured | 46.4% | Only GPT-6.1 Sol measured |
| MMMU Pro (Vals AI) | 82.5% | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| Humanity's Last Exam (Artificial Analysis run) | Not measured | 52.9% | Only GPT-6.1 Sol measured |
| GPQA Diamond (Epoch AI run) | Not measured | 95.4% | Only GPT-6.1 Sol measured |
| ARC-AGI | Not measured | 98.5% | Only GPT-6.1 Sol measured |
| ARC-AGI-2 | Not measured | 94.2% | Only GPT-6.1 Sol measured |
| Chess puzzles | Not measured | 68.0% | Only GPT-6.1 Sol measured |
| Mystery game puzzles | Not measured | 80.0% | Only GPT-6.1 Sol measured |
| EBR-bench | Not measured | 54.3% | Only GPT-6.1 Sol measured |
| LMArena Text: hard prompts | 1407 | 1463 | GPT-6.1 Sol |
| LMArena Text: expert | 1398 | 1489 | GPT-6.1 Sol |
| LMArena Text: hard prompts in English | 1403 | 1465 | GPT-6.1 Sol |
| LMArena Vision: diagrams | 1242 | 1306 | GPT-6.1 Sol |
| LMArena Vision: homework | 1271 | 1356 | GPT-6.1 Sol |
| Neither model has a result on the other 7 boards here | |||
MathLike-for-likePublic boards, shown as published, kept out of the index02
| Benchmark | Gemini 3.1 Flash Lite Preview | GPT-6.1 Sol | Leader |
|---|---|---|---|
| AIME | 83.3% | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| OTIS Mock AIME | Not measured | 100.0% | Only GPT-6.1 Sol measured |
| FrontierMath, tiers 1 to 3 | Not measured | 93.7% | Only GPT-6.1 Sol measured |
| FrontierMath, tier 4 | Not measured | 100.0% | Only GPT-6.1 Sol measured |
| ProofBench | Not measured | 99.0% | Only GPT-6.1 Sol measured |
| LMArena Text: math | 1428 | 1489 | GPT-6.1 Sol |
| LMArena Text: mathematical work | 1417 | 1513 | GPT-6.1 Sol |
| MathArena | Not measured | 84.0% | Only GPT-6.1 Sol measured |
| Neither model has a result on the other 6 boards here | |||
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index06
| Benchmark | Gemini 3.1 Flash Lite Preview | GPT-6.1 Sol | Leader |
|---|---|---|---|
| MMLU Pro | 86.2% | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| LegalBench (Vals AI) | 83.8% | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| CaseLaw (Vals AI) | 55.0% | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| CorpFin (Vals AI) | 59.4% | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| TaxEval (Vals AI) | 71.8% | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| MortgageTax (Vals AI) | 68.0% | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| MedCode (Vals AI) | 47.6% | 48.8% | GPT-6.1 Sol |
| SimpleQA Verified | Not measured | 73.9% | Only GPT-6.1 Sol measured |
| LMArena Text: science | 1425 | 1444 | GPT-6.1 Sol |
| LMArena Text: medicine and healthcare | 1428 | 1433 | GPT-6.1 Sol |
| LMArena Text: legal and government | 1418 | 1471 | GPT-6.1 Sol |
| LMArena Text: business and finance | 1389 | 1445 | GPT-6.1 Sol |
| FACTS Benchmark Suite | 51.4% | 75.3% | GPT-6.1 Sol |
| PRBench Finance | Not measured | 46.2% | Only GPT-6.1 Sol measured |
| PRBench Legal | Not measured | 47.9% | Only GPT-6.1 Sol measured |
| Neither model has a result on the other 5 boards here | |||
Web designLike-for-likePublic boards, shown as published, kept out of the index06
| Benchmark | Gemini 3.1 Flash Lite Preview | GPT-6.1 Sol | Leader |
|---|---|---|---|
| Design Arena: websites | 1082 | 1321 | GPT-6.1 Sol |
| Design Arena: UI components | 1069 | 1323 | GPT-6.1 Sol |
| Design Arena: game dev | 1029 | 1393 | GPT-6.1 Sol |
| Design Arena: data viz | 1045 | 1286 | GPT-6.1 Sol |
| Design Arena: 3D | 1047 | 1458 | GPT-6.1 Sol |
| Design Arena: all code categories | 1071 | 1346 | GPT-6.1 Sol |
| Design Arena: SVG | 1052 | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| Design Arena: ASCII art | 1167 | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| LiveBench design | Not measured | 82.1% | Only GPT-6.1 Sol measured |
GeneralLike-for-likePublic boards, shown as published, kept out of the index119
| Benchmark | Gemini 3.1 Flash Lite Preview | GPT-6.1 Sol | Leader |
|---|---|---|---|
| Vals Index | Not measured | 63.9% | Only GPT-6.1 Sol measured |
| LiveBench data analysis | Not measured | 82.7% | Only GPT-6.1 Sol measured |
| Public Benefits Bench (Vals AI) | Not measured | 59.3% | Only GPT-6.1 Sol measured |
| SAGE (Vals AI) | 49.5% | 46.5% | Gemini 3.1 Flash Lite Preview |
| MedScribe (Vals AI) | 63.9% | 86.5% | GPT-6.1 Sol |
| Vals Multimodal Index | 41.4% | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| Long context reasoning (AA-LCR) | Not measured | 84.0% | Only GPT-6.1 Sol measured |
| DTBench | Not measured | 96.5% | Only GPT-6.1 Sol measured |
| LMCA | Not measured | 62.8% | Only GPT-6.1 Sol measured |
| Furniture assembly | Not measured | 80.0% | Only GPT-6.1 Sol measured |
| LMArena Text | 1416 | 1443 | GPT-6.1 Sol |
| LMArena Text: instruction following | 1377 | 1466 | GPT-6.1 Sol |
| LMArena Text: creative writing | 1401 | 1425 | GPT-6.1 Sol |
| LMArena Vision | 1240 | 1288 | GPT-6.1 Sol |
| LMArena Text: English | 1414 | 1450 | GPT-6.1 Sol |
| LMArena Text: non-English | 1410 | 1433 | GPT-6.1 Sol |
| LMArena Text: Chinese | 1460 | 1487 | GPT-6.1 Sol |
| LMArena Text: German | 1430 | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| LMArena Text: Japanese | 1413 | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| LMArena Text: Korean | 1392 | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| LMArena Text: French | 1424 | 1460 | GPT-6.1 Sol |
| LMArena Text: Spanish | 1421 | 1439 | GPT-6.1 Sol |
| LMArena Text: Russian | 1420 | 1457 | GPT-6.1 Sol |
| LMArena Text: Polish | 1443 | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| LMArena Text: multi-turn | 1417 | 1442 | GPT-6.1 Sol |
| LMArena Text: longer queries | 1394 | 1458 | GPT-6.1 Sol |
| LMArena Text: writing and language | 1408 | 1444 | GPT-6.1 Sol |
| LMArena Text: entertainment and media | 1386 | 1426 | GPT-6.1 Sol |
| LMArena Vision: English | 1232 | 1274 | GPT-6.1 Sol |
| LMArena Vision: Chinese | 1278 | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| LMArena Vision: reading text | 1246 | 1289 | GPT-6.1 Sol |
| LMArena Vision: humor | 1266 | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| LMArena Vision: captioning | 1259 | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| LMArena Vision: recognizing things | 1308 | Not measured | Only Gemini 3.1 Flash Lite Preview measured |
| LMArena Vision: creative writing | 1248 | 1301 | GPT-6.1 Sol |
| MultiChallenge | 60.6% | 82.0% | GPT-6.1 Sol |
| 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 | GPT-6.1 Sol | 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 GPT-6.1 Sol |
|---|---|---|
| Maker | OpenAI | |
| Weights | No public weights listed | No public weights listed |
| Released | March 3, 2026 | September 29, 2026 |
| Context window | 1.05M | 1.05M |
| Input $/Mtok | $0.25 | $2.00 |
| Output $/Mtok | $1.50 | $10.00 |
| Coding index | 22.7 | 82.4 |
| Independent measurements behind it | 3 | 5 |
| Cost per solved task | $0.18 | Not computable |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Gemini 3.1 Flash Lite Preview better than GPT-6.1 Sol for coding?
Pick GPT-6.1 Sol for coding: it scores 82.4 on the Vibe Coding Index against 22.7 for Gemini 3.1 Flash Lite Preview. Pick Gemini 3.1 Flash Lite Preview for output tokens 6.7x cheaper ($1.50 vs $10.00 per million) and work measured by SAGE (Vals AI), where it leads.
Which is cheaper, Gemini 3.1 Flash Lite Preview or GPT-6.1 Sol?
Gemini 3.1 Flash Lite Preview costs $0.25 per million input tokens and $1.50 per million output tokens; GPT-6.1 Sol costs $2.00 and $10.00. 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 GPT-6.1 Sol?
GPT-6.1 Sol, with 1.05M tokens against 1.05M.
How many benchmarks is the Gemini 3.1 Flash Lite Preview vs GPT-6.1 Sol comparison based on?
55 benchmarks have a result for both models as of October 22, 2026. Gemini 3.1 Flash Lite Preview's coding index rests on 3 independent benchmarks and GPT-6.1 Sol's on 5. Where only one model has a result, the page says so instead of naming a winner.