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DeepSeek V4 Flash 0423 vs Mistral Small 3

Updated October 21, 2026. 27 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.

Replace DeepSeek V4 Flash 0423 Replace Mistral Small 3
DeepSeek V4 Flash 0423DeepSeek
Coding
No data
Overall
24.4
Output $/M
$0.28
27
Mistral Small 3Mistral AI
Coding
No data
Overall
6.7
Output $/M
$0.08
0
vs boards won of 27 shared

Decision reading

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

DeepSeek V4 Flash 0423 has the edge where the context window is larger, 1.05M against 33K tokens.

Model ADeepSeek V4 Flash 0423DeepSeekNot benchmarked1 independent benchmarkNo cost per solved taskModel BMistral Small 3Mistral AINot benchmarkedNo coding benchmarkNo cost per solved task
Shared results
27
DeepSeek V4 Flash 0423 only
21
Mistral Small 3 only
9
Like-for-like categories
6 of 9

Shared results can support a head-to-head reading. Results only one model has describe coverage, not superiority.

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
DeepSeek V4 Flash 0423 not benchmarked, Mistral Small 3 not benchmarked.
Widest category
Knowledge, 36.8 points apart on average over 4 shared benchmarks.
Widest single gap
LMArena Text: Japanese: DeepSeek V4 Flash 0423 1389 against Mistral Small 3 1111, 46.3 points apart on a 0 to 100 scale.
Output price
DeepSeek V4 Flash 0423 $0.28 against Mistral Small 3 $0.08 per million output tokens, 3.5x apart.
Context window
DeepSeek V4 Flash 0423 takes 1.05M 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
CategoryDeepSeek V4 Flash 0423BarsMistral Small 3Ties
Coding20
Intelligence10
Reasoning30
Math20
Knowledge40
General150
All shared boards270
CodingLike-for-likeSix of these boards feed the Vibe Coding Index20
Coding benchmarks for DeepSeek V4 Flash 0423 and Mistral Small 3
BenchmarkDeepSeek V4 Flash 0423Mistral Small 3Leader
LMArena WebDev1582Not measuredOnly DeepSeek V4 Flash 0423 measured
AA Coding Index52.0Not measuredOnly DeepSeek V4 Flash 0423 measured
LiveCodeBench (Artificial Analysis run)Not measured25.2%Only Mistral Small 3 measured
WeirdML45.6%Not measuredOnly DeepSeek V4 Flash 0423 measured
ALE-Bench678.2Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena Text: coding14571246DeepSeek V4 Flash 0423
LMArena Text: software and IT14531248DeepSeek V4 Flash 0423
LMArena WebDev: React1585Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena WebDev: HTML1558Not measuredOnly DeepSeek V4 Flash 0423 measured
Neither model has a result on the other 29 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index10
Intelligence benchmarks for DeepSeek V4 Flash 0423 and Mistral Small 3
BenchmarkDeepSeek V4 Flash 0423Mistral Small 3Leader
AA Intelligence Index24.46.7DeepSeek V4 Flash 0423
Epoch Capabilities Index146.1Not measuredOnly DeepSeek V4 Flash 0423 measured
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index2 boards, none shared
Agentic work benchmarks for DeepSeek V4 Flash 0423 and Mistral Small 3
BenchmarkDeepSeek V4 Flash 0423Mistral Small 3Leader
AA Agentic Index26.3Not measuredOnly DeepSeek V4 Flash 0423 measured
τ²-Bench TelecomNot measured19.6%Only Mistral Small 3 measured
Neither model has a result on the other 37 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index30
Reasoning benchmarks for DeepSeek V4 Flash 0423 and Mistral Small 3
BenchmarkDeepSeek V4 Flash 0423Mistral Small 3Leader
GPQA Diamond (Artificial Analysis run)Not measured46.2%Only Mistral Small 3 measured
Humanity's Last Exam (Artificial Analysis run)Not measured3.8%Only Mistral Small 3 measured
SimpleBench46.3%Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena Text: hard prompts14441233DeepSeek V4 Flash 0423
LMArena Text: expert14411202DeepSeek V4 Flash 0423
LMArena Text: hard prompts in English14491243DeepSeek V4 Flash 0423
Neither model has a result on the other 15 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index20
Math benchmarks for DeepSeek V4 Flash 0423 and Mistral Small 3
BenchmarkDeepSeek V4 Flash 0423Mistral Small 3Leader
AA Math IndexNot measured4.3Only Mistral Small 3 measured
AIME 2025 (Artificial Analysis run)Not measured4.3%Only Mistral Small 3 measured
LMArena Text: math14261240DeepSeek V4 Flash 0423
LMArena Text: mathematical work14321243DeepSeek V4 Flash 0423
Neither model has a result on the other 9 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index40
Knowledge benchmarks for DeepSeek V4 Flash 0423 and Mistral Small 3
BenchmarkDeepSeek V4 Flash 0423Mistral Small 3Leader
MMLU Pro (Artificial Analysis run)Not measured65.2%Only Mistral Small 3 measured
LMArena Text: science14461235DeepSeek V4 Flash 0423
LMArena Text: medicine and healthcare14481215DeepSeek V4 Flash 0423
LMArena Text: legal and government14391219DeepSeek V4 Flash 0423
LMArena Text: business and finance14251205DeepSeek V4 Flash 0423
Neither model has a result on the other 12 boards here
Web designDirectional onlyPublic boards, shown as published, kept out of the index8 boards, none shared
Web design benchmarks for DeepSeek V4 Flash 0423 and Mistral Small 3
BenchmarkDeepSeek V4 Flash 0423Mistral Small 3Leader
Design Arena: websites1208Not measuredOnly DeepSeek V4 Flash 0423 measured
Design Arena: UI components1165Not measuredOnly DeepSeek V4 Flash 0423 measured
Design Arena: game dev1197Not measuredOnly DeepSeek V4 Flash 0423 measured
Design Arena: data viz1127Not measuredOnly DeepSeek V4 Flash 0423 measured
Design Arena: 3D1189Not measuredOnly DeepSeek V4 Flash 0423 measured
Design Arena: all code categories1205Not measuredOnly DeepSeek V4 Flash 0423 measured
Design Arena: SVG1155Not measuredOnly DeepSeek V4 Flash 0423 measured
Design Arena: ASCII art1109Not measuredOnly DeepSeek V4 Flash 0423 measured
Neither model has a result on the other 1 board here
GeneralLike-for-likePublic boards, shown as published, kept out of the index150
General benchmarks for DeepSeek V4 Flash 0423 and Mistral Small 3
BenchmarkDeepSeek V4 Flash 0423Mistral Small 3Leader
IFBenchNot measured26.4%Only Mistral Small 3 measured
Long context reasoning (AA-LCR)Not measured0.0%Only Mistral Small 3 measured
DTBench86.4%Not measuredOnly DeepSeek V4 Flash 0423 measured
LMCA35.9%Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena Text14321234DeepSeek V4 Flash 0423
LMArena Text: instruction following14211214DeepSeek V4 Flash 0423
LMArena Text: creative writing14031194DeepSeek V4 Flash 0423
LMArena Text: English14411256DeepSeek V4 Flash 0423
LMArena Text: non-English14191198DeepSeek V4 Flash 0423
LMArena Text: Chinese14631204DeepSeek V4 Flash 0423
LMArena Text: German14191211DeepSeek V4 Flash 0423
LMArena Text: Japanese13891111DeepSeek V4 Flash 0423
LMArena Text: Korean13831188DeepSeek V4 Flash 0423
LMArena Text: French14391204DeepSeek V4 Flash 0423
LMArena Text: Spanish1436Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena Text: Russian14271216DeepSeek V4 Flash 0423
LMArena Text: Polish1436Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena Text: multi-turn14491217DeepSeek V4 Flash 0423
LMArena Text: longer queries14341246DeepSeek V4 Flash 0423
LMArena Text: writing and language14101214DeepSeek V4 Flash 0423
LMArena Text: entertainment and media14001184DeepSeek V4 Flash 0423
Neither model has a result on the other 25 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for DeepSeek V4 Flash 0423 and Mistral Small 3
BenchmarkDeepSeek V4 Flash 0423Mistral 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

DeepSeek V4 Flash 0423$0.0003Fits in one request
Mistral Small 3$0.0001Fits in one request

Mistral Small 3 costs less

Repository review

50K input + 3K output tokens

DeepSeek V4 Flash 0423$0.0078Fits in one request
Mistral Small 3$0.0027Exceeds the context window

Mistral Small 3 costs less

Agent loop

200K input + 10K output tokens

DeepSeek V4 Flash 0423$0.031Fits in one request
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 DeepSeek V4 Flash 0423 and Mistral Small 3
SpecificationDeepSeek V4 Flash 0423Mistral Small 3
MakerDeepSeekMistral AI
WeightsOpen weightsOpen weights
ReleasedApril 24, 2026January 30, 2025
Context window1.05M33K
Input $/Mtok$0.14$0.05
Output $/Mtok$0.28$0.08
Coding indexNot benchmarkedNot benchmarked
Independent measurements behind it10
Cost per solved taskNot computableNot computable
SourceOpenRouter listingOpenRouter listing

Questions

Is DeepSeek V4 Flash 0423 better than Mistral Small 3 for coding?

Neither model has a coding score yet, so the two cannot be ranked on coding. DeepSeek V4 Flash 0423 has the edge where the context window is larger, 1.05M against 33K tokens.

Which is cheaper, DeepSeek V4 Flash 0423 or Mistral Small 3?

DeepSeek V4 Flash 0423 costs $0.14 per million input tokens and $0.28 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, DeepSeek V4 Flash 0423 or Mistral Small 3?

DeepSeek V4 Flash 0423, with 1.05M tokens against 33K.

How many benchmarks is the DeepSeek V4 Flash 0423 vs Mistral Small 3 comparison based on?

27 benchmarks have a result for both models as of October 21, 2026. DeepSeek V4 Flash 0423's coding index rests on 1 independent benchmark and Mistral Small 3's on 0. Where only one model has a result, the page says so instead of naming a winner.

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