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Mistral Small 3.1 24B vs Solar Pro 4

Mistral Small 3.1 24B and Solar Pro 4 cost about the same per output token ($0.555 vs $0.60 per million). Updated October 22, 2026; 28 benchmarks have a result for both.

Replace Mistral Small 3.1 24B Replace Solar Pro 4
Mistral Small 3.1 24BMistral AI
Coding
No data
Overall
No data
Output $/M
$0.555
0
Solar Pro 4Upstage
Coding
No data
Overall
No data
Output $/M
$0.60
28
vs boards won of 28 shared

Mistral Small 3.1 24B or Solar Pro 4: which to pick

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

Pick Mistral Small 3.1 24B for output tokens 1.1x cheaper ($0.555 vs $0.60 per million) and work measured by LMArena Text: coding or LMArena Text: software and IT, where it leads.

Model AMistral Small 3.1 24BMistral AINot benchmarkedNo coding benchmarkNo cost per solved taskModel BSolar Pro 4UpstageNot benchmarked1 independent benchmarkNo cost per solved task
Shared results
28
Mistral Small 3.1 24B only
10
Solar Pro 4 only
17
Like-for-like categories
5 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 Small 3.1 24B not benchmarked, Solar Pro 4 not benchmarked.
Widest category
Math, 26.3 points apart on average over 2 shared benchmarks.
Widest single gap
LMArena Text: Korean: Mistral Small 3.1 24B 1207 against Solar Pro 4 1383, 29.4 points apart on a 0 to 100 scale.
Output price
Mistral Small 3.1 24B $0.555 against Solar Pro 4 $0.60 per million output tokens, 1.1x apart.
Context window
Mistral Small 3.1 24B takes 128K tokens, Solar Pro 4 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.

Boards won, where both have a result
CategoryMistral Small 3.1 24BBarsSolar Pro 4Ties
Coding02
Reasoning03
Math02
Knowledge04
General017
All shared boards028
CodingLike-for-likeSix of these boards feed the Vibe Coding Index02
Coding benchmarks for Mistral Small 3.1 24B and Solar Pro 4
BenchmarkMistral Small 3.1 24BSolar Pro 4Leader
LMArena WebDevNot measured1371Only Solar Pro 4 measured
AA Coding IndexNot measured52.7Only Solar Pro 4 measured
SciCodeNot measured48.0%Only Solar Pro 4 measured
ALE-BenchNot measured179.3Only Solar Pro 4 measured
LMArena Text: coding13091438Solar Pro 4
LMArena Text: software and IT13011431Solar Pro 4
LMArena WebDev: ReactNot measured1363Only Solar Pro 4 measured
LMArena WebDev: HTMLNot measured1371Only Solar Pro 4 measured
Neither model has a result on the other 31 boards here
IntelligenceDirectional onlyPublic boards, shown as published, kept out of the index1 board, none shared
Intelligence benchmarks for Mistral Small 3.1 24B and Solar Pro 4
BenchmarkMistral Small 3.1 24BSolar Pro 4Leader
AA Intelligence IndexNot measured28.2Only Solar Pro 4 measured
Neither model has a result on the other 1 board here
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index1 board, none shared
Agentic work benchmarks for Mistral Small 3.1 24B and Solar Pro 4
BenchmarkMistral Small 3.1 24BSolar Pro 4Leader
Design Arena: agents building web appsNot measured1105Only Solar Pro 4 measured
Neither model has a result on the other 40 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index03
Reasoning benchmarks for Mistral Small 3.1 24B and Solar Pro 4
BenchmarkMistral Small 3.1 24BSolar Pro 4Leader
GPQA Diamond (Artificial Analysis run)Not measured89.1%Only Solar Pro 4 measured
Humanity's Last Exam (Artificial Analysis run)Not measured29.8%Only Solar Pro 4 measured
LMArena Text: hard prompts12781400Solar Pro 4
LMArena Text: expert12571428Solar Pro 4
LMArena Text: hard prompts in English12901427Solar Pro 4
LMArena Vision: diagrams1119Not measuredOnly Mistral Small 3.1 24B measured
LMArena Vision: homework1158Not measuredOnly Mistral Small 3.1 24B measured
Neither model has a result on the other 15 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index02
Math benchmarks for Mistral Small 3.1 24B and Solar Pro 4
BenchmarkMistral Small 3.1 24BSolar Pro 4Leader
LMArena Text: math12611421Solar Pro 4
LMArena Text: mathematical work12711427Solar Pro 4
Neither model has a result on the other 11 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index04
Knowledge benchmarks for Mistral Small 3.1 24B and Solar Pro 4
BenchmarkMistral Small 3.1 24BSolar Pro 4Leader
LMArena Text: science12651404Solar Pro 4
LMArena Text: medicine and healthcare12671374Solar Pro 4
LMArena Text: legal and government12711383Solar Pro 4
LMArena Text: business and finance12571381Solar Pro 4
Neither model has a result on the other 14 boards here
Web designDirectional onlyPublic boards, shown as published, kept out of the index6 boards, none shared
Web design benchmarks for Mistral Small 3.1 24B and Solar Pro 4
BenchmarkMistral Small 3.1 24BSolar Pro 4Leader
Design Arena: websitesNot measured1176Only Solar Pro 4 measured
Design Arena: UI componentsNot measured1147Only Solar Pro 4 measured
Design Arena: game devNot measured1169Only Solar Pro 4 measured
Design Arena: data vizNot measured1177Only Solar Pro 4 measured
Design Arena: 3DNot measured1178Only Solar Pro 4 measured
Design Arena: all code categoriesNot measured1182Only Solar Pro 4 measured
Neither model has a result on the other 3 boards here
GeneralLike-for-likePublic boards, shown as published, kept out of the index017
General benchmarks for Mistral Small 3.1 24B and Solar Pro 4
BenchmarkMistral Small 3.1 24BSolar Pro 4Leader
Long context reasoning (AA-LCR)Not measured70.7%Only Solar Pro 4 measured
LMArena Text12771388Solar Pro 4
LMArena Text: instruction following12631375Solar Pro 4
LMArena Text: creative writing12521317Solar Pro 4
LMArena Vision1136Not measuredOnly Mistral Small 3.1 24B measured
LMArena Text: English12951414Solar Pro 4
LMArena Text: non-English12551363Solar Pro 4
LMArena Text: Chinese12531422Solar Pro 4
LMArena Text: German12661358Solar Pro 4
LMArena Text: Japanese12081320Solar Pro 4
LMArena Text: Korean12071383Solar Pro 4
LMArena Text: French12731400Solar Pro 4
LMArena Text: Spanish12841409Solar Pro 4
LMArena Text: Russian12631357Solar Pro 4
LMArena Text: Polish12421304Solar Pro 4
LMArena Text: multi-turn12701385Solar Pro 4
LMArena Text: longer queries12991382Solar Pro 4
LMArena Text: writing and language12681344Solar Pro 4
LMArena Text: entertainment and media12501332Solar Pro 4
LMArena Vision: English1157Not measuredOnly Mistral Small 3.1 24B measured
LMArena Vision: Chinese1155Not measuredOnly Mistral Small 3.1 24B measured
LMArena Vision: reading text1132Not measuredOnly Mistral Small 3.1 24B measured
LMArena Vision: humor1142Not measuredOnly Mistral Small 3.1 24B measured
LMArena Vision: captioning1153Not measuredOnly Mistral Small 3.1 24B measured
LMArena Vision: recognizing things1155Not measuredOnly Mistral Small 3.1 24B measured
LMArena Vision: creative writing1123Not measuredOnly Mistral Small 3.1 24B measured
Neither model has a result on the other 20 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for Mistral Small 3.1 24B and Solar Pro 4
BenchmarkMistral Small 3.1 24BSolar Pro 4Leader
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 Small 3.1 24B$0.0006Fits in one request
Solar Pro 4$0.0004Fits in one request

Solar Pro 4 costs less

Repository review

50K input + 3K output tokens

Mistral Small 3.1 24B$0.019Fits in one request
Solar Pro 4$0.0093Fits in one request

Solar Pro 4 costs less

Agent loop

200K input + 10K output tokens

Mistral Small 3.1 24B$0.076Exceeds the context window
Solar Pro 4$0.036Fits in one request

Solar Pro 4 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 Small 3.1 24B and Solar Pro 4
SpecificationMistral Small 3.1 24BUpstage Solar Pro 4
MakerMistral AIUpstage
WeightsOpen weightsNo public weights listed
ReleasedMarch 17, 2025August 10, 2026
Context window128K524K
Input $/Mtok$0.351$0.15
Output $/Mtok$0.555$0.60
Coding indexNot benchmarkedNot benchmarked
Independent measurements behind it01
Cost per solved taskNot computableNot computable
SourceOpenRouter listingOpenRouter listing

Questions

Is Mistral Small 3.1 24B better than Solar Pro 4 for coding?

Neither model has a coding score yet, so the two cannot be ranked on coding. Pick Mistral Small 3.1 24B for output tokens 1.1x cheaper ($0.555 vs $0.60 per million) and work measured by LMArena Text: coding or LMArena Text: software and IT, where it leads.

Which is cheaper, Mistral Small 3.1 24B or Solar Pro 4?

Mistral Small 3.1 24B costs $0.351 per million input tokens and $0.555 per million output tokens; Solar Pro 4 costs $0.15 and $0.60. Cost per solved task is known for neither of them.

Which has the bigger context window, Mistral Small 3.1 24B or Solar Pro 4?

Solar Pro 4, with 524K tokens against 128K.

How many benchmarks is the Mistral Small 3.1 24B vs Solar Pro 4 comparison based on?

28 benchmarks have a result for both models as of October 22, 2026. Mistral Small 3.1 24B's coding index rests on 0 independent benchmarks and Solar Pro 4's on 1. Where only one model has a result, the page says so instead of naming a winner.

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