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DeepSeek V4 Flash 0423 vs Mistral Large 3 2512

Updated October 21, 2026. 14 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 Large 3 2512
DeepSeek V4 Flash 0423DeepSeek
Coding
No data
Overall
24.4
Output $/M
$0.28
13
Mistral Large 3 2512Mistral AI
Coding
No data
Overall
9.3
Output $/M
$1.50
1
vs boards won of 14 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 5.4x less, and where the context window is larger, 1.05M against 262K tokens.

Model ADeepSeek V4 Flash 0423DeepSeekNot benchmarked1 independent benchmarkNo cost per solved taskModel BMistral Large 3 2512Mistral AINot benchmarked1 independent benchmark$0.77 per solved task
Shared results
14
DeepSeek V4 Flash 0423 only
34
Mistral Large 3 2512 only
14
Like-for-like categories
5 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 Large 3 2512 not benchmarked.
Widest category
Agentic work, 25.3 points apart on average over 1 shared benchmark.
Widest single gap
AA Coding Index: DeepSeek V4 Flash 0423 52.0 against Mistral Large 3 2512 20.1, 31.9 points apart on a 0 to 100 scale.
Output price
DeepSeek V4 Flash 0423 $0.28 against Mistral Large 3 2512 $1.50 per million output tokens, 5.4x apart.
Context window
DeepSeek V4 Flash 0423 takes 1.05M tokens, Mistral Large 3 2512 262K.

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 Large 3 2512Ties
Coding20
Intelligence10
Agentic work10
Web design71
General20
All shared boards131
CodingLike-for-likeSix of these boards feed the Vibe Coding Index20
Coding benchmarks for DeepSeek V4 Flash 0423 and Mistral Large 3 2512
BenchmarkDeepSeek V4 Flash 0423Mistral Large 3 2512Leader
LMArena WebDev1582Not measuredOnly DeepSeek V4 Flash 0423 measured
AA Coding Index52.020.1DeepSeek V4 Flash 0423
LiveCodeBench (Vals AI)Not measured55.3%Only Mistral Large 3 2512 measured
SWE-bench Verified (Vals AI)Not measured41.4%Only Mistral Large 3 2512 measured
WeirdML45.6%Not measuredOnly DeepSeek V4 Flash 0423 measured
ALE-Bench678.2264.7DeepSeek V4 Flash 0423
LMArena Text: coding1457Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena Text: software and IT1453Not measuredOnly DeepSeek V4 Flash 0423 measured
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 index10
Intelligence benchmarks for DeepSeek V4 Flash 0423 and Mistral Large 3 2512
BenchmarkDeepSeek V4 Flash 0423Mistral Large 3 2512Leader
AA Intelligence Index24.49.3DeepSeek V4 Flash 0423
Epoch Capabilities Index146.1Not measuredOnly DeepSeek V4 Flash 0423 measured
Agentic workLike-for-likePublic boards, shown as published, kept out of the index10
Agentic work benchmarks for DeepSeek V4 Flash 0423 and Mistral Large 3 2512
BenchmarkDeepSeek V4 Flash 0423Mistral Large 3 2512Leader
AA Agentic Index26.31.0DeepSeek V4 Flash 0423
Neither model has a result on the other 38 boards here
ReasoningDirectional onlyPublic boards, shown as published, kept out of the index6 boards, none shared
Reasoning benchmarks for DeepSeek V4 Flash 0423 and Mistral Large 3 2512
BenchmarkDeepSeek V4 Flash 0423Mistral Large 3 2512Leader
GPQA DiamondNot measured68.4%Only Mistral Large 3 2512 measured
MMMU Pro (Vals AI)Not measured66.2%Only Mistral Large 3 2512 measured
SimpleBench46.3%Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena Text: hard prompts1444Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena Text: expert1441Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena Text: hard prompts in English1449Not measuredOnly DeepSeek V4 Flash 0423 measured
Neither model has a result on the other 15 boards here
MathDirectional onlyPublic boards, shown as published, kept out of the index4 boards, none shared
Math benchmarks for DeepSeek V4 Flash 0423 and Mistral Large 3 2512
BenchmarkDeepSeek V4 Flash 0423Mistral Large 3 2512Leader
AIMENot measured42.9%Only Mistral Large 3 2512 measured
MGSM (Vals AI)Not measured85.4%Only Mistral Large 3 2512 measured
LMArena Text: math1426Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena Text: mathematical work1432Not measuredOnly DeepSeek V4 Flash 0423 measured
Neither model has a result on the other 9 boards here
KnowledgeDirectional onlyPublic boards, shown as published, kept out of the index11 boards, none shared
Knowledge benchmarks for DeepSeek V4 Flash 0423 and Mistral Large 3 2512
BenchmarkDeepSeek V4 Flash 0423Mistral Large 3 2512Leader
MMLU ProNot measured79.8%Only Mistral Large 3 2512 measured
LegalBench (Vals AI)Not measured79.1%Only Mistral Large 3 2512 measured
CaseLaw (Vals AI)Not measured61.4%Only Mistral Large 3 2512 measured
CorpFin (Vals AI)Not measured61.0%Only Mistral Large 3 2512 measured
TaxEval (Vals AI)Not measured73.1%Only Mistral Large 3 2512 measured
MortgageTax (Vals AI)Not measured52.1%Only Mistral Large 3 2512 measured
MedQA (Vals AI)Not measured82.2%Only Mistral Large 3 2512 measured
LMArena Text: science1446Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena Text: medicine and healthcare1448Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena Text: legal and government1439Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena Text: business and finance1425Not measuredOnly DeepSeek V4 Flash 0423 measured
Neither model has a result on the other 6 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index71
Web design benchmarks for DeepSeek V4 Flash 0423 and Mistral Large 3 2512
BenchmarkDeepSeek V4 Flash 0423Mistral Large 3 2512Leader
Design Arena: websites12081162DeepSeek V4 Flash 0423
Design Arena: UI components11651102DeepSeek V4 Flash 0423
Design Arena: game dev11971080DeepSeek V4 Flash 0423
Design Arena: data viz11271136Mistral Large 3 2512
Design Arena: 3D11891099DeepSeek V4 Flash 0423
Design Arena: all code categories12051142DeepSeek V4 Flash 0423
Design Arena: SVG1155993DeepSeek V4 Flash 0423
Design Arena: ASCII art11091069DeepSeek V4 Flash 0423
Neither model has a result on the other 1 board here
GeneralLike-for-likePublic boards, shown as published, kept out of the index20
General benchmarks for DeepSeek V4 Flash 0423 and Mistral Large 3 2512
BenchmarkDeepSeek V4 Flash 0423Mistral Large 3 2512Leader
SAGE (Vals AI)Not measured24.6%Only Mistral Large 3 2512 measured
DTBench86.4%65.1%DeepSeek V4 Flash 0423
LMCA35.9%16.7%DeepSeek V4 Flash 0423
LMArena Text1432Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena Text: instruction following1421Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena Text: creative writing1403Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena Text: English1441Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena Text: non-English1419Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena Text: Chinese1463Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena Text: German1419Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena Text: Japanese1389Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena Text: Korean1383Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena Text: French1439Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena Text: Spanish1436Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena Text: Russian1427Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena Text: Polish1436Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena Text: multi-turn1449Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena Text: longer queries1434Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena Text: writing and language1410Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena Text: entertainment and media1400Not measuredOnly DeepSeek V4 Flash 0423 measured
Neither model has a result on the other 26 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 Large 3 2512
BenchmarkDeepSeek V4 Flash 0423Mistral Large 3 2512Leader
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 Large 3 2512$0.0013Fits 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 Large 3 2512$0.029Fits 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 Large 3 2512$0.115Fits in one request

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 Large 3 2512
SpecificationDeepSeek V4 Flash 0423Mistral Large 3 2512
MakerDeepSeekMistral AI
WeightsOpen weightsNo public weights listed
ReleasedApril 24, 2026December 1, 2025
Context window1.05M262K
Input $/Mtok$0.14$0.50
Output $/Mtok$0.28$1.50
Coding indexNot benchmarkedNot benchmarked
Independent measurements behind it11
Cost per solved taskNot computable$0.77
SourceOpenRouter listingOpenRouter listing

Questions

Is DeepSeek V4 Flash 0423 better than Mistral Large 3 2512 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 5.4x less, and where the context window is larger, 1.05M against 262K tokens.

Which is cheaper, DeepSeek V4 Flash 0423 or Mistral Large 3 2512?

DeepSeek V4 Flash 0423 costs $0.14 per million input tokens and $0.28 per million output tokens; Mistral Large 3 2512 costs $0.50 and $1.50. Cost per solved task is known for Mistral Large 3 2512 only.

Which has the bigger context window, DeepSeek V4 Flash 0423 or Mistral Large 3 2512?

DeepSeek V4 Flash 0423, with 1.05M tokens against 262K.

How many benchmarks is the DeepSeek V4 Flash 0423 vs Mistral Large 3 2512 comparison based on?

14 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 Large 3 2512's on 1. Where only one model has a result, the page says so instead of naming a winner.

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