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DeepSeek V4 Flash 0423 vs Mistral Medium 3

Updated October 21, 2026. 37 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 Medium 3
DeepSeek V4 Flash 0423DeepSeek
Coding
No data
Overall
24.4
Output $/M
$0.28
37
Mistral Medium 3Mistral AI
Coding
No data
Overall
9.0
Output $/M
$2.00
0
vs boards won of 37 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 output tokens cost 7.1x less, and where the context window is larger, 1.05M against 131K tokens.

Model ADeepSeek V4 Flash 0423DeepSeekNot benchmarked1 independent benchmarkNo cost per solved taskModel BMistral Medium 3Mistral AINot benchmarkedNo coding benchmarkNo cost per solved task
Shared results
37
DeepSeek V4 Flash 0423 only
11
Mistral Medium 3 only
20
Like-for-like categories
7 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 Medium 3 not benchmarked.
Widest category
Web design, 16.3 points apart on average over 6 shared benchmarks.
Widest single gap
DTBench: DeepSeek V4 Flash 0423 86.4% against Mistral Medium 3 62.3%, 24.1 points apart on a 0 to 100 scale.
Output price
DeepSeek V4 Flash 0423 $0.28 against Mistral Medium 3 $2.00 per million output tokens, 7.1x apart.
Context window
DeepSeek V4 Flash 0423 takes 1.05M tokens, Mistral Medium 3 131K.

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 Medium 3Ties
Coding20
Intelligence20
Reasoning30
Math20
Knowledge40
Web design60
General180
All shared boards370
CodingLike-for-likeSix of these boards feed the Vibe Coding Index20
Coding benchmarks for DeepSeek V4 Flash 0423 and Mistral Medium 3
BenchmarkDeepSeek V4 Flash 0423Mistral Medium 3Leader
LMArena WebDev1582Not measuredOnly DeepSeek V4 Flash 0423 measured
AA Coding Index52.0Not measuredOnly DeepSeek V4 Flash 0423 measured
LiveCodeBench (Artificial Analysis run)Not measured40.0%Only Mistral Medium 3 measured
Terminal-Bench Hard (Artificial Analysis run)Not measured3.8%Only Mistral Medium 3 measured
WeirdML45.6%Not measuredOnly DeepSeek V4 Flash 0423 measured
ALE-Bench678.2Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena Text: coding14571385DeepSeek V4 Flash 0423
LMArena Text: software and IT14531385DeepSeek 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 28 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
Intelligence benchmarks for DeepSeek V4 Flash 0423 and Mistral Medium 3
BenchmarkDeepSeek V4 Flash 0423Mistral Medium 3Leader
AA Intelligence Index24.49.0DeepSeek V4 Flash 0423
Epoch Capabilities Index146.1134.0DeepSeek V4 Flash 0423
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 Medium 3
BenchmarkDeepSeek V4 Flash 0423Mistral Medium 3Leader
AA Agentic Index26.3Not measuredOnly DeepSeek V4 Flash 0423 measured
τ²-Bench TelecomNot measured24.3%Only Mistral Medium 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 Medium 3
BenchmarkDeepSeek V4 Flash 0423Mistral Medium 3Leader
GPQA Diamond (Artificial Analysis run)Not measured57.8%Only Mistral Medium 3 measured
Humanity's Last Exam (Artificial Analysis run)Not measured4.1%Only Mistral Medium 3 measured
SimpleBench46.3%Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena Text: hard prompts14441364DeepSeek V4 Flash 0423
LMArena Text: expert14411342DeepSeek V4 Flash 0423
LMArena Text: hard prompts in English14491374DeepSeek V4 Flash 0423
LMArena Vision: diagramsNot measured1155Only Mistral Medium 3 measured
LMArena Vision: homeworkNot measured1165Only Mistral Medium 3 measured
Neither model has a result on the other 13 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index20
Math benchmarks for DeepSeek V4 Flash 0423 and Mistral Medium 3
BenchmarkDeepSeek V4 Flash 0423Mistral Medium 3Leader
AA Math IndexNot measured30.3Only Mistral Medium 3 measured
AIME 2025 (Artificial Analysis run)Not measured30.3%Only Mistral Medium 3 measured
LMArena Text: math14261353DeepSeek V4 Flash 0423
LMArena Text: mathematical work14321354DeepSeek 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 Medium 3
BenchmarkDeepSeek V4 Flash 0423Mistral Medium 3Leader
MMLU Pro (Artificial Analysis run)Not measured76.0%Only Mistral Medium 3 measured
LMArena Text: science14461381DeepSeek V4 Flash 0423
LMArena Text: medicine and healthcare14481381DeepSeek V4 Flash 0423
LMArena Text: legal and government14391384DeepSeek V4 Flash 0423
LMArena Text: business and finance14251352DeepSeek V4 Flash 0423
Neither model has a result on the other 12 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index60
Web design benchmarks for DeepSeek V4 Flash 0423 and Mistral Medium 3
BenchmarkDeepSeek V4 Flash 0423Mistral Medium 3Leader
Design Arena: websites12081079DeepSeek V4 Flash 0423
Design Arena: UI components11651024DeepSeek V4 Flash 0423
Design Arena: game dev11971018DeepSeek V4 Flash 0423
Design Arena: data viz11271034DeepSeek V4 Flash 0423
Design Arena: 3D11891083DeepSeek V4 Flash 0423
Design Arena: all code categories12051069DeepSeek V4 Flash 0423
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 index180
General benchmarks for DeepSeek V4 Flash 0423 and Mistral Medium 3
BenchmarkDeepSeek V4 Flash 0423Mistral Medium 3Leader
IFBenchNot measured39.3%Only Mistral Medium 3 measured
Long context reasoning (AA-LCR)Not measured31.3%Only Mistral Medium 3 measured
DTBench86.4%62.3%DeepSeek V4 Flash 0423
LMCA35.9%Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena Text14321370DeepSeek V4 Flash 0423
LMArena Text: instruction following14211338DeepSeek V4 Flash 0423
LMArena Text: creative writing14031343DeepSeek V4 Flash 0423
LMArena VisionNot measured1157Only Mistral Medium 3 measured
LMArena Text: English14411385DeepSeek V4 Flash 0423
LMArena Text: non-English14191353DeepSeek V4 Flash 0423
LMArena Text: Chinese14631374DeepSeek V4 Flash 0423
LMArena Text: German14191377DeepSeek V4 Flash 0423
LMArena Text: Japanese13891316DeepSeek V4 Flash 0423
LMArena Text: Korean13831304DeepSeek V4 Flash 0423
LMArena Text: French14391368DeepSeek V4 Flash 0423
LMArena Text: Spanish14361364DeepSeek V4 Flash 0423
LMArena Text: Russian14271359DeepSeek V4 Flash 0423
LMArena Text: Polish14361371DeepSeek V4 Flash 0423
LMArena Text: multi-turn14491384DeepSeek V4 Flash 0423
LMArena Text: longer queries14341360DeepSeek V4 Flash 0423
LMArena Text: writing and language14101352DeepSeek V4 Flash 0423
LMArena Text: entertainment and media14001335DeepSeek V4 Flash 0423
LMArena Vision: EnglishNot measured1172Only Mistral Medium 3 measured
LMArena Vision: ChineseNot measured1161Only Mistral Medium 3 measured
LMArena Vision: reading textNot measured1154Only Mistral Medium 3 measured
LMArena Vision: humorNot measured1145Only Mistral Medium 3 measured
LMArena Vision: captioningNot measured1094Only Mistral Medium 3 measured
LMArena Vision: recognizing thingsNot measured1141Only Mistral Medium 3 measured
LMArena Vision: creative writingNot measured1146Only Mistral Medium 3 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 DeepSeek V4 Flash 0423 and Mistral Medium 3
BenchmarkDeepSeek V4 Flash 0423Mistral Medium 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 Medium 3$0.0014Fits in one request

DeepSeek V4 Flash 0423 costs less

Repository review

50K input + 3K output tokens

DeepSeek V4 Flash 0423$0.0078Fits in one request
Mistral Medium 3$0.026Fits in one request

DeepSeek V4 Flash 0423 costs less

Agent loop

200K input + 10K output tokens

DeepSeek V4 Flash 0423$0.031Fits in one request
Mistral Medium 3$0.100Exceeds the context window

DeepSeek V4 Flash 0423 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 Medium 3
SpecificationDeepSeek V4 Flash 0423Mistral Medium 3
MakerDeepSeekMistral AI
WeightsOpen weightsNo public weights listed
ReleasedApril 24, 2026May 7, 2025
Context window1.05M131K
Input $/Mtok$0.14$0.40
Output $/Mtok$0.28$2.00
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 Medium 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 output tokens cost 7.1x less, and where the context window is larger, 1.05M against 131K tokens.

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

DeepSeek V4 Flash 0423 costs $0.14 per million input tokens and $0.28 per million output tokens; Mistral Medium 3 costs $0.40 and $2.00. Cost per solved task is known for neither of them.

Which has the bigger context window, DeepSeek V4 Flash 0423 or Mistral Medium 3?

DeepSeek V4 Flash 0423, with 1.05M tokens against 131K.

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

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

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