Mistral Medium 3.1 vs Inkling Small
Inkling Small leads Mistral Medium 3.1 on the Artificial Analysis Intelligence Index, 25.7 to 9.2, and Inkling Small costs 1.7x less per output token ($1.20 vs $2.00 per million). Updated October 21, 2026; 49 benchmarks have a result for both.
Mistral Medium 3.1 or Inkling Small: which to pick
Only Inkling Small has a coding score, 27.3 on the Vibe Coding Index; Mistral Medium 3.1 has none, so the two cannot be ranked on coding.
Pick Mistral Medium 3.1 for work measured by LMArena Text: hard prompts or LMArena Text: hard prompts in English, where it leads.
- Shared results
- 49
- Mistral Medium 3.1 only
- 25
- Inkling Small only
- 35
- Like-for-like categories
- 7 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
Only Inkling Small has a coding score, so no call is made.
One side not measured
Intelligence
AA Intelligence Index
Inkling Small
Inkling Small leads, 25.7 against 9.2.
Same board, both measured
Agentic work
AA Agentic Index
Inkling Small
Inkling Small leads, 23.5 against 1.9.
Same board, both measured
Reasoning
GPQA Diamond
No call
Only Inkling Small has a GPQA Diamond result, 83.6%.
Directional only
Math
AIME
No call
Only Mistral Medium 3.1 has a AIME result, 42.3%.
Directional only
Knowledge
MMLU Pro
Inkling Small
Inkling Small leads, 85.6% against 75.3%.
Same board, both measured
Web design
Design Arena: websites
No call
Only Mistral Medium 3.1 has a Design Arena: websites result, 1133.
Directional only
General
Vals Index
No call
Only Inkling Small has a Vals Index result, 27.6%.
Directional only
Long documents
Listed context window
Inkling Small
Inkling Small takes 524K tokens against 131K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Inkling Small
Mistral Medium 3.1 $0.0014, Inkling Small $0.0010 per turn.
List prices
Cost per solved task
One SWE-bench Verified task, solved
No call
Only Inkling Small has the number, $0.16.
Directional only
At a glance
- Coding index
- Mistral Medium 3.1 not benchmarked, Inkling Small 27.3 from 4 benchmarks.
- Widest category
- Agentic work, 21.6 points apart on average over 1 shared benchmark.
- Widest single gap
- LiveCodeBench (Vals AI): Mistral Medium 3.1 44.8% against Inkling Small 85.9%, 41.1 points apart on a 0 to 100 scale.
- Output price
- Mistral Medium 3.1 $2.00 against Inkling Small $1.20 per million output tokens, 1.7x apart.
- Context window
- Mistral Medium 3.1 takes 131K tokens, Inkling Small 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 | Mistral Medium 3.1 | Bars | Inkling Small | Ties |
|---|---|---|---|---|
| Coding | 0 | 5 | ||
| Intelligence | 0 | 1 | ||
| Agentic work | 0 | 1 | ||
| Reasoning | 2 | 5 | ||
| Math | 0 | 2 | ||
| Knowledge | 4 | 5 | ||
| General | 14 | 10 | ||
| All shared boards | 20 | 29 |
CodingLike-for-likeSix of these boards feed the Vibe Coding Index05
| Benchmark | Mistral Medium 3.1 | Inkling Small | Leader |
|---|---|---|---|
| LMArena WebDev | Not measured | 1409 | Only Inkling Small measured |
| AA Coding Index | 20.5 | 52.9 | Inkling Small |
| LiveCodeBench (Vals AI) | 44.8% | 85.9% | Inkling Small |
| SWE-bench Verified (Vals AI) | Not measured | 82.2% | Only Inkling Small measured |
| Terminal-Bench 4 (Vals AI) | Not measured | 0.0% | Only Inkling Small measured |
| Vibe Code Bench (Vals AI) | Not measured | 19.1% | Only Inkling Small measured |
| Code migration (Vals AI) | Not measured | 13.7% | Only Inkling Small measured |
| ProgramBench (Vals AI) | Not measured | 0.5% | Only Inkling Small measured |
| IOI (Vals AI) | Not measured | 9.3% | Only Inkling Small measured |
| Terminal-Bench 2.1 (Vals AI) | Not measured | 55.1% | Only Inkling Small measured |
| SkillsBench (Vals AI) | Not measured | 33.6% | Only Inkling Small measured |
| CyberBench (Vals AI) | Not measured | 64.1% | Only Inkling Small measured |
| LiveCodeBench (Artificial Analysis run) | 40.6% | Not measured | Only Mistral Medium 3.1 measured |
| SciCode | 32.4% | 49.7% | Inkling Small |
| Terminal-Bench Hard (Artificial Analysis run) | 10.6% | Not measured | Only Mistral Medium 3.1 measured |
| ALE-Bench | 210.2 | Not measured | Only Mistral Medium 3.1 measured |
| LMArena Text: coding | 1433 | 1450 | Inkling Small |
| LMArena Text: software and IT | 1436 | 1447 | Inkling Small |
| LMArena WebDev: React | Not measured | 1399 | Only Inkling Small measured |
| LMArena WebDev: HTML | Not measured | 1398 | Only Inkling Small measured |
| LMArena WebDev: from an image | Not measured | 1410 | Only Inkling Small measured |
| Neither model has a result on the other 18 boards here | |||
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index01
| Benchmark | Mistral Medium 3.1 | Inkling Small | Leader |
|---|---|---|---|
| AA Intelligence Index | 9.2 | 25.7 | Inkling Small |
| Epoch Capabilities Index | Not measured | 150.3 | Only Inkling Small measured |
Agentic workLike-for-likePublic boards, shown as published, kept out of the index01
| Benchmark | Mistral Medium 3.1 | Inkling Small | Leader |
|---|---|---|---|
| AA Agentic Index | 1.9 | 23.5 | Inkling Small |
| Finance Agent (Vals AI) | Not measured | 41.3% | Only Inkling Small measured |
| Tax Agent Bench (Vals AI) | Not measured | 15.4% | Only Inkling Small measured |
| Legal Research Bench (Vals AI) | Not measured | 25.5% | Only Inkling Small measured |
| Harvey's Legal Agent Benchmark (Vals AI) | Not measured | 2.9% | Only Inkling Small measured |
| Excel Modeling Benchmark (Vals AI) | Not measured | 31.8% | Only Inkling Small measured |
| τ²-Bench Telecom | 40.6% | Not measured | Only Mistral Medium 3.1 measured |
| Neither model has a result on the other 34 boards here | |||
ReasoningLike-for-likePublic boards, shown as published, kept out of the index25
| Benchmark | Mistral Medium 3.1 | Inkling Small | Leader |
|---|---|---|---|
| GPQA Diamond | Not measured | 83.6% | Only Inkling Small measured |
| MMMU Pro (Vals AI) | 63.0% | Not measured | Only Mistral Medium 3.1 measured |
| GPQA Diamond (Artificial Analysis run) | 58.8% | 89.5% | Inkling Small |
| Humanity's Last Exam (Artificial Analysis run) | 4.7% | 33.3% | Inkling Small |
| GPQA Diamond (Epoch AI run) | Not measured | 88.5% | Only Inkling Small measured |
| ARC-AGI | Not measured | 84.0% | Only Inkling Small measured |
| ARC-AGI-2 | Not measured | 40.1% | Only Inkling Small measured |
| Mystery game puzzles | Not measured | 6.0% | Only Inkling Small measured |
| LMArena Text: hard prompts | 1426 | 1423 | Mistral Medium 3.1 |
| LMArena Text: expert | 1408 | 1441 | Inkling Small |
| LMArena Text: hard prompts in English | 1435 | 1429 | Mistral Medium 3.1 |
| LMArena Vision: diagrams | 1175 | 1251 | Inkling Small |
| LMArena Vision: homework | 1165 | 1257 | Inkling Small |
| Neither model has a result on the other 9 boards here | |||
MathLike-for-likePublic boards, shown as published, kept out of the index02
| Benchmark | Mistral Medium 3.1 | Inkling Small | Leader |
|---|---|---|---|
| AIME | 42.3% | Not measured | Only Mistral Medium 3.1 measured |
| MATH 500 (Vals AI) | 87.0% | Not measured | Only Mistral Medium 3.1 measured |
| MGSM (Vals AI) | 90.9% | Not measured | Only Mistral Medium 3.1 measured |
| AA Math Index | 38.3 | Not measured | Only Mistral Medium 3.1 measured |
| AIME 2025 (Artificial Analysis run) | 38.3% | Not measured | Only Mistral Medium 3.1 measured |
| OTIS Mock AIME | Not measured | 90.0% | Only Inkling Small measured |
| FrontierMath, tiers 1 to 3 | Not measured | 46.3% | Only Inkling Small measured |
| FrontierMath, tier 4 | Not measured | 17.1% | Only Inkling Small measured |
| ProofBench | Not measured | 6.0% | Only Inkling Small measured |
| LMArena Text: math | 1408 | 1459 | Inkling Small |
| LMArena Text: mathematical work | 1412 | 1441 | Inkling Small |
| Neither model has a result on the other 2 boards here | |||
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index45
| Benchmark | Mistral Medium 3.1 | Inkling Small | Leader |
|---|---|---|---|
| MMLU Pro | 75.3% | 85.6% | Inkling Small |
| LegalBench (Vals AI) | 62.0% | 83.0% | Inkling Small |
| CorpFin (Vals AI) | 50.7% | 69.6% | Inkling Small |
| TaxEval (Vals AI) | 70.3% | 75.5% | Inkling Small |
| MortgageTax (Vals AI) | 36.5% | 62.3% | Inkling Small |
| MedQA (Vals AI) | 78.2% | Not measured | Only Mistral Medium 3.1 measured |
| MedCode (Vals AI) | Not measured | 37.9% | Only Inkling Small measured |
| MMLU Pro (Artificial Analysis run) | 68.3% | Not measured | Only Mistral Medium 3.1 measured |
| SimpleQA Verified | Not measured | 19.1% | Only Inkling Small measured |
| LMArena Text: science | 1444 | 1428 | Mistral Medium 3.1 |
| LMArena Text: medicine and healthcare | 1449 | 1413 | Mistral Medium 3.1 |
| LMArena Text: legal and government | 1439 | 1415 | Mistral Medium 3.1 |
| LMArena Text: business and finance | 1418 | 1413 | Mistral Medium 3.1 |
| Neither model has a result on the other 5 boards here | |||
Web designDirectional onlyPublic boards, shown as published, kept out of the index8 boards, none shared
| Benchmark | Mistral Medium 3.1 | Inkling Small | Leader |
|---|---|---|---|
| Design Arena: websites | 1133 | Not measured | Only Mistral Medium 3.1 measured |
| Design Arena: UI components | 1100 | Not measured | Only Mistral Medium 3.1 measured |
| Design Arena: game dev | 1074 | Not measured | Only Mistral Medium 3.1 measured |
| Design Arena: data viz | 1144 | Not measured | Only Mistral Medium 3.1 measured |
| Design Arena: 3D | 1081 | Not measured | Only Mistral Medium 3.1 measured |
| Design Arena: all code categories | 1120 | Not measured | Only Mistral Medium 3.1 measured |
| Design Arena: SVG | 993 | Not measured | Only Mistral Medium 3.1 measured |
| Design Arena: ASCII art | 997 | Not measured | Only Mistral Medium 3.1 measured |
| Neither model has a result on the other 1 board here | |||
GeneralLike-for-likePublic boards, shown as published, kept out of the index1410
| Benchmark | Mistral Medium 3.1 | Inkling Small | Leader |
|---|---|---|---|
| Vals Index | Not measured | 27.6% | Only Inkling Small measured |
| Public Benefits Bench (Vals AI) | Not measured | 59.4% | Only Inkling Small measured |
| SAGE (Vals AI) | Not measured | 32.7% | Only Inkling Small measured |
| MedScribe (Vals AI) | Not measured | 84.1% | Only Inkling Small measured |
| Vals Multimodal Index | Not measured | 50.0% | Only Inkling Small measured |
| IFBench | 39.8% | Not measured | Only Mistral Medium 3.1 measured |
| Long context reasoning (AA-LCR) | 42.7% | 75.7% | Inkling Small |
| DTBench | 67.5% | Not measured | Only Mistral Medium 3.1 measured |
| LMCA | 19.1% | Not measured | Only Mistral Medium 3.1 measured |
| LMArena Text | 1424 | 1413 | Mistral Medium 3.1 |
| LMArena Text: instruction following | 1398 | 1399 | Inkling Small |
| LMArena Text: creative writing | 1391 | 1334 | Mistral Medium 3.1 |
| LMArena Vision | 1172 | 1237 | Inkling Small |
| LMArena Text: English | 1438 | 1421 | Mistral Medium 3.1 |
| LMArena Text: non-English | 1408 | 1401 | Mistral Medium 3.1 |
| LMArena Text: Chinese | 1447 | 1464 | Inkling Small |
| LMArena Text: German | 1432 | 1408 | Mistral Medium 3.1 |
| LMArena Text: Japanese | 1379 | 1401 | Inkling Small |
| LMArena Text: Korean | 1380 | 1367 | Mistral Medium 3.1 |
| LMArena Text: French | 1460 | 1435 | Mistral Medium 3.1 |
| LMArena Text: Spanish | 1433 | 1422 | Mistral Medium 3.1 |
| LMArena Text: Russian | 1411 | 1394 | Mistral Medium 3.1 |
| LMArena Text: Polish | 1430 | 1428 | Mistral Medium 3.1 |
| LMArena Text: multi-turn | 1418 | 1416 | Mistral Medium 3.1 |
| LMArena Text: longer queries | 1406 | 1402 | Mistral Medium 3.1 |
| LMArena Text: writing and language | 1395 | 1357 | Mistral Medium 3.1 |
| LMArena Text: entertainment and media | 1390 | 1352 | Mistral Medium 3.1 |
| LMArena Vision: English | 1179 | 1243 | Inkling Small |
| LMArena Vision: Chinese | 1190 | 1292 | Inkling Small |
| LMArena Vision: reading text | 1175 | 1243 | Inkling Small |
| LMArena Vision: humor | 1168 | 1207 | Inkling Small |
| LMArena Vision: captioning | 1145 | Not measured | Only Mistral Medium 3.1 measured |
| LMArena Vision: recognizing things | 1147 | Not measured | Only Mistral Medium 3.1 measured |
| LMArena Vision: creative writing | 1200 | 1205 | Inkling Small |
| 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 | Mistral Medium 3.1 | Inkling Small | 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 Small costs less
Repository review
50K input + 3K output tokens
Mistral Medium 3.1 costs less
Agent loop
200K input + 10K output tokens
Mistral Medium 3.1 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 | Mistral Medium 3.1 | Thinking Machines Inkling Small |
|---|---|---|
| Maker | Mistral AI | Thinking Machines |
| Weights | No public weights listed | Open weights |
| Released | August 13, 2025 | July 30, 2026 |
| Context window | 131K | 524K |
| Input $/Mtok | $0.40 | $0.45 |
| Output $/Mtok | $2.00 | $1.20 |
| Coding index | Not benchmarked | 27.3 |
| Independent measurements behind it | 0 | 4 |
| Cost per solved task | Not computable | $0.16 |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Mistral Medium 3.1 better than Inkling Small for coding?
Only Inkling Small has a coding score, 27.3 on the Vibe Coding Index; Mistral Medium 3.1 has none, so the two cannot be ranked on coding. Pick Mistral Medium 3.1 for work measured by LMArena Text: hard prompts or LMArena Text: hard prompts in English, where it leads.
Which is cheaper, Mistral Medium 3.1 or Inkling Small?
Mistral Medium 3.1 costs $0.40 per million input tokens and $2.00 per million output tokens; Inkling Small costs $0.45 and $1.20. Cost per solved task is known for Inkling Small only.
Which has the bigger context window, Mistral Medium 3.1 or Inkling Small?
Inkling Small, with 524K tokens against 131K.
How many benchmarks is the Mistral Medium 3.1 vs Inkling Small comparison based on?
49 benchmarks have a result for both models as of October 21, 2026. Mistral Medium 3.1's coding index rests on 0 independent benchmarks and Inkling Small's on 4. Where only one model has a result, the page says so instead of naming a winner.