Compare / DeepSeek vs Mistral AI

AI labs compared · October 2026

DeepSeek vs Mistral AI: which AI lab is ahead?

Each lab's best model on sale goes head to head on every kind of work we measure, from our own benchmarks and licensed sources. 24 models in all; a lab is only as good as the model you would actually pick from it.

12 models on sale with our resultsDeepSeek Best: DeepSeek-V4.1-Flash · newest: DeepSeek-V4.1-Flash
12 models on sale with our resultsMistral AI Best: Mistral Large 4 · newest: Mistral Large 4
DeepSeek wins 31 too close to callMistral AI wins 3

Kinds of work led by each lab's best model there, of the 7 both are measured on.

Results as of 8 October 2026 (catalogue release 2026-10-08-4199ce0620fe). Models on sale means listed on OpenRouter today.

DeepSeek or Mistral AI? The short answer

DeepSeek and Mistral AI are level: each lab's best model leads in 3 of the 7 kinds of work both are measured on.

  • Pick DeepSeek for product listings, reasoning and knowledge and writing.
  • Pick Mistral AI for decks from an analysis, marketing planning and sticking to the facts.
  • On our overall leaderboard, DeepSeek-V4.1-Flash is #9 (56 of 100) and Mistral Large 4 is #17 (37).
  • Prices start at $0.18 per million tokens for DeepSeek (DeepSeek-V4-Flash (0731)) and $0.058 for Mistral AI (Mistral Small 3).

Head to head

56DeepSeek-V4.1-Flash
Best Spring Prompt overall score
37Mistral Large 4
39.5DeepSeek-V4.1-Flash
Best Intelligence Index
38.4Mistral Large 4
$0.52DeepSeek-V4.1-Flash
Flagship price, per million tokens
$2.06Mistral Large 4
$0.18DeepSeek-V4-Flash (0731)
Cheapest model, per million tokens
$0.058Mistral Small 3
12
Models on sale with our results
12

Each line names the model behind the number. Prices are blended, three input tokens to one output, at the developer's list price where we have read it; see every model's price. Intelligence Index from Artificial Analysis; overall score from our leaderboard.

Which lab is better for what

For each kind of work, each lab's best model there and its rank among every model on sale. Further right is better; the better rank is in green.

Product listingsTurning a sparse product feed and photos into listings that can go live 7 of 20DeepSeek-V4.1-Flash 14 of 20Mistral Medium 3.5
Decks from an analysisTurning a finished analysis into a deck you could present as it is 18 of 19DeepSeek-V4-Pro (0423) 16 of 19Mistral Medium 3.5
User surveysPlanning a user survey and reading its results without being misled not measured 4 of 8Mistral Large 4
Marketing planningPlanning a year of ad spend without overspending 13 of 19DeepSeek-V4-Pro (0423) 10 of 19Mistral Large 4
Agents and tool useMulti-step tasks with tools: support desks, coding agents, function calls 21 of 164DeepSeek-V4.1-Flash 21 of 164Mistral Large 4
Professional workReal tasks from banking, consulting and law, business documents and freelance projects 29 of 51DeepSeek-V4-Pro (0813) not measured
Reasoning and knowledgeHard questions across science, maths and general knowledge 29 of 198DeepSeek-V4-Pro (0813) 44 of 198Mistral Large 4
WritingWhat people prefer in blind comparisons, and judged writing quality 28 of 188DeepSeek-V4.1-Flash 86 of 188Mistral Medium 3.5
Sticking to the factsSummarising without inventing things, and factual answers 20 of 152DeepSeek-V3.1 9 of 152Mistral Small 3
Speed under pressureGood decisions against a real clock (fast chess) not measured 8 of 22Mistral Medium 3.5

Every model, by intelligence and price

Each dot is a model on sale with an Intelligence Index from Artificial Analysis. Up is smarter; left is cheaper. Hover or tap a dot for its name.

DeepSeekMistral AI

01020304050 $0.01$0.1$1$10 Price per million tokens, blended (log scale) Intelligence Index DeepSeek-V4.1-FlashDeepSeek-V4-Pro (0423)DeepSeek-V4-Pro (0813)DeepSeek-V4-Flash (0731)DeepSeek-V4-Flash (0423)Mistral Large 4

On our overall leaderboard

The 4 of their models we rank overall: one score out of 100 across everything we publish (how the score works). Only models with enough of our own results are ranked.

  1. #9DeepSeek-V4.1-Flash56
  2. #17Mistral Large 437
  3. #18DeepSeek-V4-Pro (0423)33
  4. #20Mistral Medium 3.518

Benchmark by benchmark

The headline result of every benchmark both labs have models on: each lab's best model and its rank among the models on sale. Green marks the better rank.

MeasureDeepSeekMistral AI
Agents and tool use
Berkeley Function Calling Leaderboard (BFCL) V4 · Overall accuracy · BFCL% correct, higher is better 56.7%DeepSeek-V3.2-Exp · 7 of 3837.7%Mistral Medium 3 · 21 of 38
Artificial Analysis · Terminal-Bench 4.0% of tasks, higher is better 26.8%DeepSeek-V4.1-Flash · 17 of 10526.8%Mistral Large 4 · 17 of 105
Artificial Analysis · Terminal-Bench 2.1% of tasks, higher is better 78.7%DeepSeek-V4-Pro (0813) · 24 of 11550.6%Mistral Medium 3.5 · 58 of 115
Artificial Analysis · τ-bench banking% of tasks, higher is better 39.6%DeepSeek-V4-Pro (0813) · 17 of 11315.1%Mistral Medium 3.5 · 57 of 113
Decks from an analysis
DeckBench · Deck ratingrating, higher is better 613DeepSeek-V4-Pro (0423) · 18 of 19646Mistral Medium 3.5 · 16 of 19
Marketing planning
ROASBench · Overall scorescore out of 100, higher is better 28.3DeepSeek-V4-Pro (0423) · 13 of 1937.0Mistral Large 4 · 10 of 19
Product listings
CatalogBench · Reliably publish-ready% of products, higher is better 41.1%DeepSeek-V4.1-Flash · 9 of 2017.9%Mistral Medium 3.5 · 16 of 20
CatalogBench · Reliably publish-ready · sales brief% of products, higher is better 23.2%DeepSeek-V4.1-Flash · 6 of 2010.7%Mistral Medium 3.5 · 9 of 20
Reasoning and knowledge
Artificial Analysis · Artificial Analysis Intelligence Indexindex score, higher is better 39.5DeepSeek-V4.1-Flash · 26 of 19838.4Mistral Large 4 · 29 of 198
Artificial Analysis · Humanity's Last Exam% of questions, higher is better 41.0%DeepSeek-V4-Pro (0813) · 34 of 19735.0%Mistral Large 4 · 54 of 197
Artificial Analysis · GPQA Diamond% of questions, higher is better 92.8%DeepSeek-V4-Pro (0813) · 15 of 18776.9%Mistral Small 4 · 112 of 187
Sticking to the facts
Vectara Hallucination Leaderboard · Hallucination rate · Vectara% of summaries, lower is better 5.3%DeepSeek-V3.2-Exp · 10 of 795.1%Mistral Small 3 · 6 of 79
Arena (formerly LMArena) · Overall · Text factualityArena rating, higher is better 1,467DeepSeek-V4.1-Flash · 23 of 1131,434Mistral Large 3 · 71 of 113
Writing
Arena (formerly LMArena) · Overall · TextArena rating, higher is better 1,474DeepSeek-V4.1-Flash · 26 of 1661,427Mistral Medium 3.5 · 73 of 166
UGI Leaderboard · Writing score · UGIscore out of 100, higher is better 68.4DeepSeek-V4-Pro (0423) · 14 of 13845.5Mistral Medium 3.5 · 68 of 138

Their models, one against one

Quick answers

Is DeepSeek or Mistral AI better?

DeepSeek and Mistral AI are level: each lab's best model leads in 3 of the 7 kinds of work both are measured on.

What is DeepSeek's best model?

DeepSeek-V4.1-Flash: #9 on the Spring Prompt overall leaderboard and 39.5 on the Artificial Analysis Intelligence Index.

What is Mistral AI's best model?

Mistral Large 4: #17 on the Spring Prompt overall leaderboard and 38.4 on the Artificial Analysis Intelligence Index.

Which is better for reasoning and knowledge, DeepSeek or Mistral AI?

DeepSeek: its best model there, DeepSeek-V4-Pro (0813), ranks 29 of 198 models on sale, against 44 for Mistral AI's Mistral Large 4.

Which is better for writing, DeepSeek or Mistral AI?

DeepSeek: its best model there, DeepSeek-V4.1-Flash, ranks 28 of 188 models on sale, against 86 for Mistral AI's Mistral Medium 3.5.

Which is cheaper, DeepSeek or Mistral AI?

Mistral AI's cheapest model with results, Mistral Small 3, costs $0.058 per million tokens (three input to one output), against $0.18 for DeepSeek-V4-Flash (0731) from DeepSeek.

Other labs compared

Which model is best for your product?

Benchmarks aren't your data. We test the models from DeepSeek, Mistral AI and the rest on your own tasks, with the cost of every answer.

Talk to usSee the leaderboard