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DeepSeek V4 Flash 0731 vs Mistral Large 3 2512

DeepSeek V4 Flash 0731 leads Mistral Large 3 2512 on the Artificial Analysis Intelligence Index, 34.3 to 9.3, and DeepSeek V4 Flash 0731 costs 3.8x less per output token ($0.396 vs $1.50 per million). Updated October 22, 2026; 21 benchmarks have a result for both.

Replace DeepSeek V4 Flash 0731 Replace Mistral Large 3 2512
DeepSeek V4 Flash 0731DeepSeek
Coding
51.8
Overall
55.2
Output $/M
$0.396
19
Mistral Large 3 2512Mistral AI
Coding
No data
Overall
No data
Output $/M
$1.50
2
vs boards won of 21 shared

DeepSeek V4 Flash 0731 or Mistral Large 3 2512: which to pick

Only DeepSeek V4 Flash 0731 has a coding score, 51.8 on the Vibe Coding Index; Mistral Large 3 2512 has none, so the two cannot be ranked on coding.

Pick Mistral Large 3 2512 for work measured by LegalBench (Vals AI) or TaxEval (Vals AI), where it leads.

Model ADeepSeek V4 Flash 0731DeepSeek51.8/1004 independent benchmarks$0.01 per solved taskModel BMistral Large 3 2512Mistral AINot benchmarked1 independent benchmark$0.77 per solved task
Shared results
21
DeepSeek V4 Flash 0731 only
34
Mistral Large 3 2512 only
7
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
DeepSeek V4 Flash 0731 51.8 from 4 benchmarks, Mistral Large 3 2512 not benchmarked.
Widest category
Coding, 40.8 points apart on average over 4 shared benchmarks.
Widest single gap
AA Coding Index: DeepSeek V4 Flash 0731 69.1 against Mistral Large 3 2512 20.1, 49.0 points apart on a 0 to 100 scale.
Output price
DeepSeek V4 Flash 0731 $0.396 against Mistral Large 3 2512 $1.50 per million output tokens, 3.8x apart.
Context window
DeepSeek V4 Flash 0731 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 0731BarsMistral Large 3 2512Ties
Coding40
Intelligence10
Agentic work10
Reasoning10
Knowledge22
Web design80
General20
All shared boards192
CodingLike-for-likeSix of these boards feed the Vibe Coding Index40
Coding benchmarks for DeepSeek V4 Flash 0731 and Mistral Large 3 2512
BenchmarkDeepSeek V4 Flash 0731Mistral Large 3 2512Leader
AA Coding Index69.120.1DeepSeek V4 Flash 0731
LiveCodeBench (Vals AI)87.3%55.3%DeepSeek V4 Flash 0731
SWE-bench Verified (Vals AI)88.8%41.4%DeepSeek V4 Flash 0731
Terminal-Bench 4 (Vals AI)18.7%Not measuredOnly DeepSeek V4 Flash 0731 measured
Vibe Code Bench (Vals AI)74.7%Not measuredOnly DeepSeek V4 Flash 0731 measured
Code migration (Vals AI)38.6%Not measuredOnly DeepSeek V4 Flash 0731 measured
ProgramBench (Vals AI)0.0%Not measuredOnly DeepSeek V4 Flash 0731 measured
IOI (Vals AI)32.7%Not measuredOnly DeepSeek V4 Flash 0731 measured
Terminal-Bench 2.1 (Vals AI)67.0%Not measuredOnly DeepSeek V4 Flash 0731 measured
SkillsBench (Vals AI)50.7%Not measuredOnly DeepSeek V4 Flash 0731 measured
CyberBench (Vals AI)72.1%Not measuredOnly DeepSeek V4 Flash 0731 measured
SciCode50.3%Not measuredOnly DeepSeek V4 Flash 0731 measured
FrontierCode18.8%Not measuredOnly DeepSeek V4 Flash 0731 measured
WeirdML63.0%Not measuredOnly DeepSeek V4 Flash 0731 measured
ALE-Bench1306.1264.7DeepSeek V4 Flash 0731
Neither model has a result on the other 24 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index10
Intelligence benchmarks for DeepSeek V4 Flash 0731 and Mistral Large 3 2512
BenchmarkDeepSeek V4 Flash 0731Mistral Large 3 2512Leader
AA Intelligence Index34.39.3DeepSeek V4 Flash 0731
Epoch Capabilities Index154.8Not measuredOnly DeepSeek V4 Flash 0731 measured
Agentic workLike-for-likePublic boards, shown as published, kept out of the index10
Agentic work benchmarks for DeepSeek V4 Flash 0731 and Mistral Large 3 2512
BenchmarkDeepSeek V4 Flash 0731Mistral Large 3 2512Leader
AA Agentic Index41.01.0DeepSeek V4 Flash 0731
Finance Agent (Vals AI)49.5%Not measuredOnly DeepSeek V4 Flash 0731 measured
Tax Agent Bench (Vals AI)28.1%Not measuredOnly DeepSeek V4 Flash 0731 measured
Legal Research Bench (Vals AI)30.3%Not measuredOnly DeepSeek V4 Flash 0731 measured
Excel Modeling Benchmark (Vals AI)57.0%Not measuredOnly DeepSeek V4 Flash 0731 measured
BioMysteryBench (Vals AI)64.4%Not measuredOnly DeepSeek V4 Flash 0731 measured
Terminal-Bench-Science (Vals AI)4.3%Not measuredOnly DeepSeek V4 Flash 0731 measured
Neither model has a result on the other 34 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index10
Reasoning benchmarks for DeepSeek V4 Flash 0731 and Mistral Large 3 2512
BenchmarkDeepSeek V4 Flash 0731Mistral Large 3 2512Leader
GPQA Diamond89.9%68.4%DeepSeek V4 Flash 0731
MMMU Pro (Vals AI)Not measured66.2%Only Mistral Large 3 2512 measured
GPQA Diamond (Artificial Analysis run)90.8%Not measuredOnly DeepSeek V4 Flash 0731 measured
Humanity's Last Exam (Artificial Analysis run)38.6%Not measuredOnly DeepSeek V4 Flash 0731 measured
GPQA Diamond (Epoch AI run)91.0%Not measuredOnly DeepSeek V4 Flash 0731 measured
ARC-AGI89.0%Not measuredOnly DeepSeek V4 Flash 0731 measured
ARC-AGI-261.4%Not measuredOnly DeepSeek V4 Flash 0731 measured
SimpleBench61.1%Not measuredOnly DeepSeek V4 Flash 0731 measured
Chess puzzles32.0%Not measuredOnly DeepSeek V4 Flash 0731 measured
Mystery game puzzles34.0%Not measuredOnly DeepSeek V4 Flash 0731 measured
Neither model has a result on the other 12 boards here
MathDirectional onlyPublic boards, shown as published, kept out of the index6 boards, none shared
Math benchmarks for DeepSeek V4 Flash 0731 and Mistral Large 3 2512
BenchmarkDeepSeek V4 Flash 0731Mistral Large 3 2512Leader
AIMENot measured42.9%Only Mistral Large 3 2512 measured
MGSM (Vals AI)Not measured85.4%Only Mistral Large 3 2512 measured
OTIS Mock AIME94.4%Not measuredOnly DeepSeek V4 Flash 0731 measured
FrontierMath, tiers 1 to 357.5%Not measuredOnly DeepSeek V4 Flash 0731 measured
FrontierMath, tier 424.4%Not measuredOnly DeepSeek V4 Flash 0731 measured
ProofBench56.0%Not measuredOnly DeepSeek V4 Flash 0731 measured
Neither model has a result on the other 7 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index22
Knowledge benchmarks for DeepSeek V4 Flash 0731 and Mistral Large 3 2512
BenchmarkDeepSeek V4 Flash 0731Mistral Large 3 2512Leader
MMLU Pro86.2%79.8%DeepSeek V4 Flash 0731
LegalBench (Vals AI)77.7%79.1%Mistral Large 3 2512
CaseLaw (Vals AI)Not measured61.4%Only Mistral Large 3 2512 measured
CorpFin (Vals AI)61.9%61.0%DeepSeek V4 Flash 0731
TaxEval (Vals AI)70.7%73.1%Mistral Large 3 2512
MortgageTax (Vals AI)Not measured52.1%Only Mistral Large 3 2512 measured
MedQA (Vals AI)Not measured82.2%Only Mistral Large 3 2512 measured
MedCode (Vals AI)41.4%Not measuredOnly DeepSeek V4 Flash 0731 measured
SimpleQA Verified33.6%Not measuredOnly DeepSeek V4 Flash 0731 measured
Neither model has a result on the other 9 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index80
Web design benchmarks for DeepSeek V4 Flash 0731 and Mistral Large 3 2512
BenchmarkDeepSeek V4 Flash 0731Mistral Large 3 2512Leader
Design Arena: websites12371162DeepSeek V4 Flash 0731
Design Arena: UI components12331099DeepSeek V4 Flash 0731
Design Arena: game dev12071080DeepSeek V4 Flash 0731
Design Arena: data viz11801136DeepSeek V4 Flash 0731
Design Arena: 3D12081099DeepSeek V4 Flash 0731
Design Arena: all code categories12291141DeepSeek V4 Flash 0731
Design Arena: SVG1184992DeepSeek V4 Flash 0731
Design Arena: ASCII art10901069DeepSeek V4 Flash 0731
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 0731 and Mistral Large 3 2512
BenchmarkDeepSeek V4 Flash 0731Mistral Large 3 2512Leader
SAGE (Vals AI)Not measured24.6%Only Mistral Large 3 2512 measured
MedScribe (Vals AI)80.4%Not measuredOnly DeepSeek V4 Flash 0731 measured
Long context reasoning (AA-LCR)79.7%Not measuredOnly DeepSeek V4 Flash 0731 measured
DTBench90.9%65.1%DeepSeek V4 Flash 0731
LMCA41.7%16.7%DeepSeek V4 Flash 0731
Neither model has a result on the other 41 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for DeepSeek V4 Flash 0731 and Mistral Large 3 2512
BenchmarkDeepSeek V4 Flash 0731Mistral 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 0731$0.0003Fits in one request
Mistral Large 3 2512$0.0013Fits in one request

DeepSeek V4 Flash 0731 costs less

Repository review

50K input + 3K output tokens

DeepSeek V4 Flash 0731$0.0082Fits in one request
Mistral Large 3 2512$0.029Fits in one request

DeepSeek V4 Flash 0731 costs less

Agent loop

200K input + 10K output tokens

DeepSeek V4 Flash 0731$0.032Fits in one request
Mistral Large 3 2512$0.115Fits in one request

DeepSeek V4 Flash 0731 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 0731 and Mistral Large 3 2512
SpecificationDeepSeek V4 Flash 0731Mistral Large 3 2512
MakerDeepSeekMistral AI
WeightsOpen weightsNo public weights listed
ReleasedJuly 31, 2026December 1, 2025
Context window1.05M262K
Input $/Mtok$0.14$0.50
Output $/Mtok$0.396$1.50
Coding index51.8Not benchmarked
Independent measurements behind it41
Cost per solved task$0.01$0.77
SourceOpenRouter listingOpenRouter listing

Questions

Is DeepSeek V4 Flash 0731 better than Mistral Large 3 2512 for coding?

Only DeepSeek V4 Flash 0731 has a coding score, 51.8 on the Vibe Coding Index; Mistral Large 3 2512 has none, so the two cannot be ranked on coding. Pick Mistral Large 3 2512 for work measured by LegalBench (Vals AI) or TaxEval (Vals AI), where it leads.

Which is cheaper, DeepSeek V4 Flash 0731 or Mistral Large 3 2512?

DeepSeek V4 Flash 0731 costs $0.14 per million input tokens and $0.396 per million output tokens; Mistral Large 3 2512 costs $0.50 and $1.50. Per solved SWE-bench Verified task, DeepSeek V4 Flash 0731 costs $0.01 and Mistral Large 3 2512 $0.77.

Which has the bigger context window, DeepSeek V4 Flash 0731 or Mistral Large 3 2512?

DeepSeek V4 Flash 0731, with 1.05M tokens against 262K.

How many benchmarks is the DeepSeek V4 Flash 0731 vs Mistral Large 3 2512 comparison based on?

21 benchmarks have a result for both models as of October 22, 2026. DeepSeek V4 Flash 0731's coding index rests on 4 independent benchmarks 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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