Gemini 3.1 Pro Preview vs Inkling
Gemini 3.1 Pro Preview leads Inkling on coding, 32.3 to 31.5 on the Vibe Coding Index, and Inkling costs 3.0x less per output token ($4.05 vs $12.00 per million). Updated October 22, 2026; 88 benchmarks have a result for both.
Gemini 3.1 Pro Preview or Inkling: which to pick
Gemini 3.1 Pro Preview and Inkling are level for coding, 32.3 against 31.5 on the Vibe Coding Index, so price and context decide.
Pick Inkling for output tokens 3.0x cheaper ($4.05 vs $12.00 per million) and a lower cost per solved task ($0.76 against $0.99). Pick Gemini 3.1 Pro Preview for a larger context window (1.05M against 524K tokens) and work measured by LMArena WebDev or AA Coding Index, where it leads.
- Shared results
- 88
- Gemini 3.1 Pro Preview only
- 45
- Inkling only
- 14
- 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
No call
Level: 32.3 against 31.5, inside 2 points.
4 and 6 benchmarks behind the scores
Intelligence
AA Intelligence Index
Gemini 3.1 Pro Preview
Gemini 3.1 Pro Preview leads, 29.7 against 25.0.
Same board, both measured
Agentic work
AA Agentic Index
Inkling
Inkling leads, 22.5 against 8.2.
Same board, both measured
Reasoning
GPQA Diamond
Gemini 3.1 Pro Preview
Gemini 3.1 Pro Preview leads, 95.5% against 87.1%.
Same board, both measured
Math
AIME
No call
Only Gemini 3.1 Pro Preview has a AIME result, 98.1%.
Directional only
Knowledge
MMLU Pro
Gemini 3.1 Pro Preview
Gemini 3.1 Pro Preview leads, 91.0% against 86.3%.
Same board, both measured
Web design
Design Arena: websites
Gemini 3.1 Pro Preview
Gemini 3.1 Pro Preview leads, 1233 against 1224.
Same board, both measured
General
Vals Index
No call
Only Inkling has a Vals Index result, 29.0%.
Directional only
Long documents
Listed context window
Gemini 3.1 Pro Preview
Gemini 3.1 Pro Preview takes 1.05M tokens against 524K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Inkling
Gemini 3.1 Pro Preview $0.0080, Inkling $0.0030 per turn.
List prices
Cost per solved task
One SWE-bench Verified task, solved
Inkling
Gemini 3.1 Pro Preview $0.99, Inkling $0.76.
Published attempt cost and pass rate
At a glance
- Coding index
- Gemini 3.1 Pro Preview 32.3 from 4 benchmarks, Inkling 31.5 from 6 benchmarks.
- Widest category
- Reasoning, 14.9 points apart on average over 12 shared benchmarks.
- Widest single gap
- ARC-AGI-2: Gemini 3.1 Pro Preview 77.1% against Inkling 36.5%, 40.6 points apart on a 0 to 100 scale.
- Output price
- Gemini 3.1 Pro Preview $12.00 against Inkling $4.05 per million output tokens, 3.0x apart.
- Context window
- Gemini 3.1 Pro Preview takes 1.05M tokens, Inkling 524K.
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 Pro Preview | Bars | Inkling | Ties |
|---|---|---|---|---|
| Coding | 16 | 1 | 1 tie | |
| Intelligence | 1 | 0 | ||
| Agentic work | 2 | 5 | 1 tie | |
| Reasoning | 12 | 0 | ||
| Math | 6 | 0 | ||
| Knowledge | 9 | 2 | ||
| Web design | 8 | 0 | ||
| General | 22 | 2 | ||
| All shared boards | 76 | 10 | 2 ties |
CodingLike-for-likeSix of these boards feed the Vibe Coding Index161
| Benchmark | Gemini 3.1 Pro Preview | Inkling | Leader |
|---|---|---|---|
| LiveBench coding | Not measured | 64.0% | Only Inkling measured |
| LMArena WebDev | 1447 | 1414 | Gemini 3.1 Pro Preview |
| AA Coding Index | 68.8 | 52.1 | Gemini 3.1 Pro Preview |
| LiveCodeBench (Vals AI) | 88.5% | 85.5% | Gemini 3.1 Pro Preview |
| SWE-bench Verified (Vals AI) | 78.8% | 77.6% | Gemini 3.1 Pro Preview |
| Terminal-Bench 4 (Vals AI) | 2.5% | 0.5% | Gemini 3.1 Pro Preview |
| Vibe Code Bench (Vals AI) | 32.0% | 19.2% | Gemini 3.1 Pro Preview |
| Code migration (Vals AI) | 17.3% | 11.8% | Gemini 3.1 Pro Preview |
| ProgramBench (Vals AI) | 0.0% | 0.0% | Tie |
| IOI (Vals AI) | 51.8% | 14.9% | Gemini 3.1 Pro Preview |
| Terminal-Bench 2.1 (Vals AI) | 70.8% | 47.6% | Gemini 3.1 Pro Preview |
| Vibe Code Bench 1-100 (Vals AI) | 6.7% | 7.3% | Inkling |
| SkillsBench (Vals AI) | Not measured | 26.1% | Only Inkling measured |
| CyberBench (Vals AI) | Not measured | 66.8% | Only Inkling measured |
| SciCode | 58.7% | 47.0% | Gemini 3.1 Pro Preview |
| Terminal-Bench Hard (Artificial Analysis run) | 53.8% | Not measured | Only Gemini 3.1 Pro Preview measured |
| Terminal-Bench | 80.2% | Not measured | Only Gemini 3.1 Pro Preview measured |
| FrontierCode | Not measured | 14.0% | Only Inkling measured |
| FrontierSWE | Not measured | 4.1% | Only Inkling measured |
| GSO-Bench | 22.6% | Not measured | Only Gemini 3.1 Pro Preview measured |
| WeirdML | 72.1% | 32.3% | Gemini 3.1 Pro Preview |
| MirrorCode | 8.9% | Not measured | Only Gemini 3.1 Pro Preview measured |
| ALE-Bench | 1160.6 | 946.0 | Gemini 3.1 Pro Preview |
| LMArena Text: coding | 1484 | 1466 | Gemini 3.1 Pro Preview |
| LMArena Text: software and IT | 1487 | 1465 | Gemini 3.1 Pro Preview |
| LMArena WebDev: React | 1438 | 1404 | Gemini 3.1 Pro Preview |
| LMArena WebDev: HTML | 1490 | 1399 | Gemini 3.1 Pro Preview |
| LMArena WebDev: from an image | 1481 | Not measured | Only Gemini 3.1 Pro Preview measured |
| SciCode | 14.3% | Not measured | Only Gemini 3.1 Pro Preview measured |
| Neither model has a result on the other 10 boards here | |||
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index10
| Benchmark | Gemini 3.1 Pro Preview | Inkling | Leader |
|---|---|---|---|
| AA Intelligence Index | 29.7 | 25.0 | Gemini 3.1 Pro Preview |
| Epoch Capabilities Index | Not measured | 148.4 | Only Inkling measured |
Agentic workLike-for-likePublic boards, shown as published, kept out of the index25
| Benchmark | Gemini 3.1 Pro Preview | Inkling | Leader |
|---|---|---|---|
| AA Agentic Index | 8.2 | 22.5 | Inkling |
| Design Arena: agents building web apps | 1125 | 1196 | Inkling |
| Design Arena: agents building full-stack apps | 1068 | Not measured | Only Gemini 3.1 Pro Preview measured |
| Design Arena: agents building mobile apps | 1094 | Not measured | Only Gemini 3.1 Pro Preview measured |
| Design Arena: agents building Android apps | 1049 | Not measured | Only Gemini 3.1 Pro Preview measured |
| Design Arena: agents building Godot games | 1236 | Not measured | Only Gemini 3.1 Pro Preview measured |
| Design Arena: agents building games | 1113 | Not measured | Only Gemini 3.1 Pro Preview measured |
| Design Arena: HTML slides | 1103 | Not measured | Only Gemini 3.1 Pro Preview measured |
| Design Arena: PowerPoint slides | 1041 | Not measured | Only Gemini 3.1 Pro Preview measured |
| LiveBench research | Not measured | 59.9% | Only Inkling measured |
| LiveBench browser | Not measured | 16.0% | Only Inkling measured |
| LiveBench long agentic | Not measured | 14.1% | Only Inkling measured |
| SREBench (Vals AI) | 0.0% | 0.0% | Tie |
| Finance Agent (Vals AI) | 43.0% | 46.6% | Inkling |
| Tax Agent Bench (Vals AI) | 9.3% | 15.3% | Inkling |
| Legal Research Bench (Vals AI) | 20.7% | 28.4% | Inkling |
| Harvey's Legal Agent Benchmark (Vals AI) | Not measured | 3.8% | Only Inkling measured |
| Excel Modeling Benchmark (Vals AI) | 52.6% | 38.4% | Gemini 3.1 Pro Preview |
| BioMysteryBench (Vals AI) | 60.0% | Not measured | Only Gemini 3.1 Pro Preview measured |
| Terminal-Bench-Science (Vals AI) | 1.4% | Not measured | Only Gemini 3.1 Pro Preview measured |
| Vals Science Index | 27.4% | Not measured | Only Gemini 3.1 Pro Preview measured |
| τ²-Bench Telecom | 95.6% | Not measured | Only Gemini 3.1 Pro Preview measured |
| APEX-Agents | 35.1% | 33.8% | Gemini 3.1 Pro Preview |
| METR time horizons | 77.0% | Not measured | Only Gemini 3.1 Pro Preview measured |
| BALROG | 57.0% | Not measured | Only Gemini 3.1 Pro Preview measured |
| DeepResearch Bench | 47.8% | Not measured | Only Gemini 3.1 Pro Preview measured |
| PostTrainBench | 22.0% | Not measured | Only Gemini 3.1 Pro Preview measured |
| Vending-Bench 2 | $911 | Not measured | Only Gemini 3.1 Pro Preview measured |
| Neither model has a result on the other 13 boards here | |||
ReasoningLike-for-likePublic boards, shown as published, kept out of the index120
| Benchmark | Gemini 3.1 Pro Preview | Inkling | Leader |
|---|---|---|---|
| GPQA Diamond | 95.5% | 87.1% | Gemini 3.1 Pro Preview |
| LiveBench reasoning | Not measured | 78.3% | Only Inkling measured |
| MysteryMechanism (Vals AI) | 20.7% | Not measured | Only Gemini 3.1 Pro Preview measured |
| MMMU Pro (Vals AI) | 88.2% | 78.5% | Gemini 3.1 Pro Preview |
| GPQA Diamond (Artificial Analysis run) | 94.1% | 87.2% | Gemini 3.1 Pro Preview |
| Humanity's Last Exam (Artificial Analysis run) | 47.0% | 31.9% | Gemini 3.1 Pro Preview |
| GPQA Diamond (Epoch AI run) | 94.4% | 88.3% | Gemini 3.1 Pro Preview |
| ARC-AGI | 98.0% | 79.5% | Gemini 3.1 Pro Preview |
| ARC-AGI-2 | 77.1% | 36.5% | Gemini 3.1 Pro Preview |
| SimpleBench | 79.6% | 50.0% | Gemini 3.1 Pro Preview |
| Chess puzzles | 51.0% | 21.0% | Gemini 3.1 Pro Preview |
| Mystery game puzzles | 34.0% | Not measured | Only Gemini 3.1 Pro Preview measured |
| EBR-bench | 14.3% | Not measured | Only Gemini 3.1 Pro Preview measured |
| LMArena Text: hard prompts | 1485 | 1451 | Gemini 3.1 Pro Preview |
| LMArena Text: expert | 1483 | 1466 | Gemini 3.1 Pro Preview |
| LMArena Text: hard prompts in English | 1480 | 1448 | Gemini 3.1 Pro Preview |
| LMArena Vision: diagrams | 1311 | Not measured | Only Gemini 3.1 Pro Preview measured |
| LMArena Vision: homework | 1316 | Not measured | Only Gemini 3.1 Pro Preview measured |
| Neither model has a result on the other 4 boards here | |||
MathLike-for-likePublic boards, shown as published, kept out of the index60
| Benchmark | Gemini 3.1 Pro Preview | Inkling | Leader |
|---|---|---|---|
| AIME | 98.1% | Not measured | Only Gemini 3.1 Pro Preview measured |
| OTIS Mock AIME | 95.6% | 88.9% | Gemini 3.1 Pro Preview |
| FrontierMath, tiers 1 to 3 | 59.6% | 33.3% | Gemini 3.1 Pro Preview |
| FrontierMath, tier 4 | 26.8% | 4.9% | Gemini 3.1 Pro Preview |
| ProofBench | 26.0% | 0.0% | Gemini 3.1 Pro Preview |
| LMArena Text: math | 1486 | 1479 | Gemini 3.1 Pro Preview |
| LMArena Text: mathematical work | 1478 | 1460 | Gemini 3.1 Pro Preview |
| Neither model has a result on the other 6 boards here | |||
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index92
| Benchmark | Gemini 3.1 Pro Preview | Inkling | Leader |
|---|---|---|---|
| MMLU Pro | 91.0% | 86.3% | Gemini 3.1 Pro Preview |
| LegalBench (Vals AI) | 87.4% | 83.0% | Gemini 3.1 Pro Preview |
| CaseLaw (Vals AI) | 64.8% | Not measured | Only Gemini 3.1 Pro Preview measured |
| CorpFin (Vals AI) | 64.5% | 68.6% | Inkling |
| TaxEval (Vals AI) | 72.9% | 75.3% | Inkling |
| MortgageTax (Vals AI) | 69.4% | 64.0% | Gemini 3.1 Pro Preview |
| MedQA (Vals AI) | 96.4% | Not measured | Only Gemini 3.1 Pro Preview measured |
| MedCode (Vals AI) | 59.1% | 41.2% | Gemini 3.1 Pro Preview |
| SimpleQA Verified | 73.5% | 40.3% | Gemini 3.1 Pro Preview |
| LMArena Text: science | 1497 | 1455 | Gemini 3.1 Pro Preview |
| LMArena Text: medicine and healthcare | 1486 | 1447 | Gemini 3.1 Pro Preview |
| LMArena Text: legal and government | 1487 | 1448 | Gemini 3.1 Pro Preview |
| LMArena Text: business and finance | 1459 | 1438 | Gemini 3.1 Pro Preview |
| FACTS Benchmark Suite | 67.4% | Not measured | Only Gemini 3.1 Pro Preview measured |
| Neither model has a result on the other 4 boards here | |||
Web designLike-for-likePublic boards, shown as published, kept out of the index80
| Benchmark | Gemini 3.1 Pro Preview | Inkling | Leader |
|---|---|---|---|
| Design Arena: websites | 1233 | 1224 | Gemini 3.1 Pro Preview |
| Design Arena: UI components | 1224 | 1198 | Gemini 3.1 Pro Preview |
| Design Arena: game dev | 1202 | 1165 | Gemini 3.1 Pro Preview |
| Design Arena: data viz | 1209 | 1156 | Gemini 3.1 Pro Preview |
| Design Arena: 3D | 1234 | 1160 | Gemini 3.1 Pro Preview |
| Design Arena: all code categories | 1231 | 1205 | Gemini 3.1 Pro Preview |
| Design Arena: SVG | 1285 | 1108 | Gemini 3.1 Pro Preview |
| Design Arena: ASCII art | 1270 | 1089 | Gemini 3.1 Pro Preview |
| LiveBench design | Not measured | 58.3% | Only Inkling measured |
GeneralLike-for-likePublic boards, shown as published, kept out of the index222
| Benchmark | Gemini 3.1 Pro Preview | Inkling | Leader |
|---|---|---|---|
| Vals Index | Not measured | 29.0% | Only Inkling measured |
| LiveBench data analysis | Not measured | 72.8% | Only Inkling measured |
| Public Benefits Bench (Vals AI) | 53.8% | 58.5% | Inkling |
| SAGE (Vals AI) | 48.7% | 36.5% | Gemini 3.1 Pro Preview |
| MedScribe (Vals AI) | 76.1% | 85.4% | Inkling |
| Vals Multimodal Index | 56.1% | 49.4% | Gemini 3.1 Pro Preview |
| IFBench | 77.1% | Not measured | Only Gemini 3.1 Pro Preview measured |
| Long context reasoning (AA-LCR) | 82.0% | 77.3% | Gemini 3.1 Pro Preview |
| DTBench | 97.1% | 87.5% | Gemini 3.1 Pro Preview |
| LMCA | 53.8% | 37.6% | Gemini 3.1 Pro Preview |
| CL-bench | 20.8% | Not measured | Only Gemini 3.1 Pro Preview measured |
| Furniture assembly | 26.7% | Not measured | Only Gemini 3.1 Pro Preview measured |
| ExploitBench | 26.1% | Not measured | Only Gemini 3.1 Pro Preview measured |
| CL-bench Life | 16.9% | Not measured | Only Gemini 3.1 Pro Preview measured |
| LMArena Text | 1480 | 1442 | Gemini 3.1 Pro Preview |
| LMArena Text: instruction following | 1466 | 1425 | Gemini 3.1 Pro Preview |
| LMArena Text: creative writing | 1482 | 1390 | Gemini 3.1 Pro Preview |
| LMArena Vision | 1296 | Not measured | Only Gemini 3.1 Pro Preview measured |
| LMArena Text: English | 1478 | 1442 | Gemini 3.1 Pro Preview |
| LMArena Text: non-English | 1476 | 1434 | Gemini 3.1 Pro Preview |
| LMArena Text: Chinese | 1527 | 1493 | Gemini 3.1 Pro Preview |
| LMArena Text: German | 1490 | 1445 | Gemini 3.1 Pro Preview |
| LMArena Text: Japanese | 1491 | 1429 | Gemini 3.1 Pro Preview |
| LMArena Text: Korean | 1455 | 1403 | Gemini 3.1 Pro Preview |
| LMArena Text: French | 1487 | 1455 | Gemini 3.1 Pro Preview |
| LMArena Text: Spanish | 1481 | 1449 | Gemini 3.1 Pro Preview |
| LMArena Text: Russian | 1497 | 1430 | Gemini 3.1 Pro Preview |
| LMArena Text: Polish | 1498 | 1450 | Gemini 3.1 Pro Preview |
| LMArena Text: multi-turn | 1487 | 1437 | Gemini 3.1 Pro Preview |
| LMArena Text: longer queries | 1482 | 1435 | Gemini 3.1 Pro Preview |
| LMArena Text: writing and language | 1481 | 1404 | Gemini 3.1 Pro Preview |
| LMArena Text: entertainment and media | 1465 | 1394 | Gemini 3.1 Pro Preview |
| LMArena Vision: English | 1287 | Not measured | Only Gemini 3.1 Pro Preview measured |
| LMArena Vision: Chinese | 1364 | Not measured | Only Gemini 3.1 Pro Preview measured |
| LMArena Vision: reading text | 1304 | Not measured | Only Gemini 3.1 Pro Preview measured |
| LMArena Vision: humor | 1322 | Not measured | Only Gemini 3.1 Pro Preview measured |
| LMArena Vision: captioning | 1345 | Not measured | Only Gemini 3.1 Pro Preview measured |
| LMArena Vision: recognizing things | 1330 | Not measured | Only Gemini 3.1 Pro Preview measured |
| LMArena Vision: creative writing | 1324 | Not measured | Only Gemini 3.1 Pro Preview measured |
| LMArena Document | 1444 | Not measured | Only Gemini 3.1 Pro Preview measured |
| Neither model has a result on the other 6 boards here | |||
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Gemini 3.1 Pro Preview | Inkling | 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
Inkling costs less
Repository review
50K input + 3K output tokens
Inkling costs less
Agent loop
200K input + 10K output tokens
Inkling 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 Pro Preview | Thinking Machines Inkling |
|---|---|---|
| Maker | Thinking Machines | |
| Weights | No public weights listed | Open weights |
| Released | February 19, 2026 | July 17, 2026 |
| Context window | 1.05M | 524K |
| Input $/Mtok | $2.00 | $0.975 |
| Output $/Mtok | $12.00 | $4.05 |
| Coding index | 32.3 | 31.5 |
| Independent measurements behind it | 4 | 6 |
| Cost per solved task | $0.99 | $0.76 |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Gemini 3.1 Pro Preview better than Inkling for coding?
Gemini 3.1 Pro Preview and Inkling are level for coding, 32.3 against 31.5 on the Vibe Coding Index, so price and context decide. Pick Inkling for output tokens 3.0x cheaper ($4.05 vs $12.00 per million) and a lower cost per solved task ($0.76 against $0.99). Pick Gemini 3.1 Pro Preview for a larger context window (1.05M against 524K tokens) and work measured by LMArena WebDev or AA Coding Index, where it leads.
Which is cheaper, Gemini 3.1 Pro Preview or Inkling?
Gemini 3.1 Pro Preview costs $2.00 per million input tokens and $12.00 per million output tokens; Inkling costs $0.975 and $4.05. Per solved SWE-bench Verified task, Gemini 3.1 Pro Preview costs $0.99 and Inkling $0.76.
Which has the bigger context window, Gemini 3.1 Pro Preview or Inkling?
Gemini 3.1 Pro Preview, with 1.05M tokens against 524K.
How many benchmarks is the Gemini 3.1 Pro Preview vs Inkling comparison based on?
88 benchmarks have a result for both models as of October 22, 2026. Gemini 3.1 Pro Preview's coding index rests on 4 independent benchmarks and Inkling's on 6. Where only one model has a result, the page says so instead of naming a winner.