Enter opens the highlighted result. Esc closes.

Mistral Medium 3.1 vs Mistral Small 3

Mistral Medium 3.1 leads Mistral Small 3 on the Artificial Analysis Intelligence Index, 9.2 to 6.7, and Mistral Small 3 costs 25.0x less per output token ($0.08 vs $2.00 per million). Updated October 21, 2026; 36 benchmarks have a result for both.

Replace Mistral Medium 3.1 Replace Mistral Small 3
Mistral Medium 3.1Mistral AI
Coding
No data
Overall
No data
Output $/M
$2.00
36
Mistral Small 3Mistral AI
Coding
No data
Overall
No data
Output $/M
$0.08
0
vs boards won of 36 shared

Mistral Medium 3.1 or Mistral Small 3: which to pick

Neither model has a coding score yet, so the two cannot be ranked on coding.

Pick Mistral Medium 3.1 for a larger context window (131K against 33K tokens).

Model AMistral Medium 3.1Mistral AINot benchmarkedNo coding benchmarkNo cost per solved taskModel BMistral Small 3Mistral AINot benchmarkedNo coding benchmarkNo cost per solved task
Shared results
36
Mistral Medium 3.1 only
38
Mistral Small 3 only
0
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.

At a glance

Coding index
Mistral Medium 3.1 not benchmarked, Mistral Small 3 not benchmarked.
Widest category
General, 33.6 points apart on average over 17 shared benchmarks.
Widest single gap
LMArena Text: Japanese: Mistral Medium 3.1 1379 against Mistral Small 3 1111, 44.6 points apart on a 0 to 100 scale.
Output price
Mistral Medium 3.1 $2.00 against Mistral Small 3 $0.08 per million output tokens, 25.0x apart.
Context window
Mistral Medium 3.1 takes 131K tokens, Mistral Small 3 33K.

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.

Boards won, where both have a result
CategoryMistral Medium 3.1BarsMistral Small 3Ties
Coding30
Intelligence10
Agentic work10
Reasoning50
Math40
Knowledge50
General170
All shared boards360
CodingLike-for-likeSix of these boards feed the Vibe Coding Index30
Coding benchmarks for Mistral Medium 3.1 and Mistral Small 3
BenchmarkMistral Medium 3.1Mistral Small 3Leader
AA Coding Index20.5Not measuredOnly Mistral Medium 3.1 measured
LiveCodeBench (Vals AI)44.8%Not measuredOnly Mistral Medium 3.1 measured
LiveCodeBench (Artificial Analysis run)40.6%25.2%Mistral Medium 3.1
SciCode32.4%Not measuredOnly Mistral Medium 3.1 measured
Terminal-Bench Hard (Artificial Analysis run)10.6%Not measuredOnly Mistral Medium 3.1 measured
ALE-Bench210.2Not measuredOnly Mistral Medium 3.1 measured
LMArena Text: coding14331246Mistral Medium 3.1
LMArena Text: software and IT14361248Mistral Medium 3.1
Neither model has a result on the other 31 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index10
Intelligence benchmarks for Mistral Medium 3.1 and Mistral Small 3
BenchmarkMistral Medium 3.1Mistral Small 3Leader
AA Intelligence Index9.26.7Mistral Medium 3.1
Neither model has a result on the other 1 board here
Agentic workLike-for-likePublic boards, shown as published, kept out of the index10
Agentic work benchmarks for Mistral Medium 3.1 and Mistral Small 3
BenchmarkMistral Medium 3.1Mistral Small 3Leader
AA Agentic Index1.9Not measuredOnly Mistral Medium 3.1 measured
τ²-Bench Telecom40.6%19.6%Mistral Medium 3.1
Neither model has a result on the other 39 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index50
Reasoning benchmarks for Mistral Medium 3.1 and Mistral Small 3
BenchmarkMistral Medium 3.1Mistral Small 3Leader
MMMU Pro (Vals AI)63.0%Not measuredOnly Mistral Medium 3.1 measured
GPQA Diamond (Artificial Analysis run)58.8%46.2%Mistral Medium 3.1
Humanity's Last Exam (Artificial Analysis run)4.7%3.8%Mistral Medium 3.1
LMArena Text: hard prompts14261233Mistral Medium 3.1
LMArena Text: expert14081202Mistral Medium 3.1
LMArena Text: hard prompts in English14351243Mistral Medium 3.1
LMArena Vision: diagrams1175Not measuredOnly Mistral Medium 3.1 measured
LMArena Vision: homework1165Not measuredOnly Mistral Medium 3.1 measured
Neither model has a result on the other 14 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index40
Math benchmarks for Mistral Medium 3.1 and Mistral Small 3
BenchmarkMistral Medium 3.1Mistral Small 3Leader
AIME42.3%Not measuredOnly Mistral Medium 3.1 measured
MATH 500 (Vals AI)87.0%Not measuredOnly Mistral Medium 3.1 measured
MGSM (Vals AI)90.9%Not measuredOnly Mistral Medium 3.1 measured
AA Math Index38.34.3Mistral Medium 3.1
AIME 2025 (Artificial Analysis run)38.3%4.3%Mistral Medium 3.1
LMArena Text: math14081240Mistral Medium 3.1
LMArena Text: mathematical work14121243Mistral Medium 3.1
Neither model has a result on the other 6 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index50
Knowledge benchmarks for Mistral Medium 3.1 and Mistral Small 3
BenchmarkMistral Medium 3.1Mistral Small 3Leader
MMLU Pro75.3%Not measuredOnly Mistral Medium 3.1 measured
LegalBench (Vals AI)62.0%Not measuredOnly Mistral Medium 3.1 measured
CorpFin (Vals AI)50.7%Not measuredOnly Mistral Medium 3.1 measured
TaxEval (Vals AI)70.3%Not measuredOnly Mistral Medium 3.1 measured
MortgageTax (Vals AI)36.5%Not measuredOnly Mistral Medium 3.1 measured
MedQA (Vals AI)78.2%Not measuredOnly Mistral Medium 3.1 measured
MMLU Pro (Artificial Analysis run)68.3%65.2%Mistral Medium 3.1
LMArena Text: science14441235Mistral Medium 3.1
LMArena Text: medicine and healthcare14491215Mistral Medium 3.1
LMArena Text: legal and government14391219Mistral Medium 3.1
LMArena Text: business and finance14181205Mistral Medium 3.1
Neither model has a result on the other 7 boards here
Web designDirectional onlyPublic boards, shown as published, kept out of the index8 boards, none shared
Web design benchmarks for Mistral Medium 3.1 and Mistral Small 3
BenchmarkMistral Medium 3.1Mistral Small 3Leader
Design Arena: websites1133Not measuredOnly Mistral Medium 3.1 measured
Design Arena: UI components1100Not measuredOnly Mistral Medium 3.1 measured
Design Arena: game dev1074Not measuredOnly Mistral Medium 3.1 measured
Design Arena: data viz1144Not measuredOnly Mistral Medium 3.1 measured
Design Arena: 3D1081Not measuredOnly Mistral Medium 3.1 measured
Design Arena: all code categories1120Not measuredOnly Mistral Medium 3.1 measured
Design Arena: SVG993Not measuredOnly Mistral Medium 3.1 measured
Design Arena: ASCII art997Not measuredOnly 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 index170
General benchmarks for Mistral Medium 3.1 and Mistral Small 3
BenchmarkMistral Medium 3.1Mistral Small 3Leader
IFBench39.8%26.4%Mistral Medium 3.1
Long context reasoning (AA-LCR)42.7%0.0%Mistral Medium 3.1
DTBench67.5%Not measuredOnly Mistral Medium 3.1 measured
LMCA19.1%Not measuredOnly Mistral Medium 3.1 measured
LMArena Text14241234Mistral Medium 3.1
LMArena Text: instruction following13981214Mistral Medium 3.1
LMArena Text: creative writing13911194Mistral Medium 3.1
LMArena Vision1172Not measuredOnly Mistral Medium 3.1 measured
LMArena Text: English14381256Mistral Medium 3.1
LMArena Text: non-English14081198Mistral Medium 3.1
LMArena Text: Chinese14471204Mistral Medium 3.1
LMArena Text: German14321211Mistral Medium 3.1
LMArena Text: Japanese13791111Mistral Medium 3.1
LMArena Text: Korean13801188Mistral Medium 3.1
LMArena Text: French14601204Mistral Medium 3.1
LMArena Text: Spanish1433Not measuredOnly Mistral Medium 3.1 measured
LMArena Text: Russian14111216Mistral Medium 3.1
LMArena Text: Polish1430Not measuredOnly Mistral Medium 3.1 measured
LMArena Text: multi-turn14181217Mistral Medium 3.1
LMArena Text: longer queries14061246Mistral Medium 3.1
LMArena Text: writing and language13951214Mistral Medium 3.1
LMArena Text: entertainment and media13901184Mistral Medium 3.1
LMArena Vision: English1179Not measuredOnly Mistral Medium 3.1 measured
LMArena Vision: Chinese1190Not measuredOnly Mistral Medium 3.1 measured
LMArena Vision: reading text1175Not measuredOnly Mistral Medium 3.1 measured
LMArena Vision: humor1168Not measuredOnly Mistral Medium 3.1 measured
LMArena Vision: captioning1145Not measuredOnly Mistral Medium 3.1 measured
LMArena Vision: recognizing things1147Not measuredOnly Mistral Medium 3.1 measured
LMArena Vision: creative writing1200Not measuredOnly Mistral Medium 3.1 measured
Neither model has a result on the other 17 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for Mistral Medium 3.1 and Mistral Small 3
BenchmarkMistral Medium 3.1Mistral Small 3Leader
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

Mistral Medium 3.1$0.0014Fits in one request
Mistral Small 3$0.0001Fits in one request

Mistral Small 3 costs less

Repository review

50K input + 3K output tokens

Mistral Medium 3.1$0.026Fits in one request
Mistral Small 3$0.0027Exceeds the context window

Mistral Small 3 costs less

Agent loop

200K input + 10K output tokens

Mistral Medium 3.1$0.100Exceeds the context window
Mistral Small 3$0.011Exceeds the context window

Mistral Small 3 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.

Specifications of Mistral Medium 3.1 and Mistral Small 3
SpecificationMistral Medium 3.1Mistral Small 3
MakerMistral AIMistral AI
WeightsNo public weights listedOpen weights
ReleasedAugust 13, 2025January 30, 2025
Context window131K33K
Input $/Mtok$0.40$0.05
Output $/Mtok$2.00$0.08
Coding indexNot benchmarkedNot benchmarked
Independent measurements behind it00
Cost per solved taskNot computableNot computable
SourceOpenRouter listingOpenRouter listing

Questions

Is Mistral Medium 3.1 better than Mistral Small 3 for coding?

Neither model has a coding score yet, so the two cannot be ranked on coding. Pick Mistral Medium 3.1 for a larger context window (131K against 33K tokens).

Which is cheaper, Mistral Medium 3.1 or Mistral Small 3?

Mistral Medium 3.1 costs $0.40 per million input tokens and $2.00 per million output tokens; Mistral Small 3 costs $0.05 and $0.08. Cost per solved task is known for neither of them.

Which has the bigger context window, Mistral Medium 3.1 or Mistral Small 3?

Mistral Medium 3.1, with 131K tokens against 33K.

How many benchmarks is the Mistral Medium 3.1 vs Mistral Small 3 comparison based on?

36 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 Mistral Small 3's on 0. Where only one model has a result, the page says so instead of naming a winner.

Compare next