Compare / Anthropic vs Mistral AI

AI labs compared · October 2026

Anthropic 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. 28 models in all; a lab is only as good as the model you would actually pick from it.

16 models on sale with our resultsAnthropic Best: Claude Opus 5.5 · newest: Claude Haiku 5.5
12 models on sale with our resultsMistral AI Best: Mistral Large 4 · newest: Mistral Large 4
Anthropic wins 8Mistral AI wins 1

Kinds of work led by each lab's best model there, of the 9 both are measured on.

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

Anthropic or Mistral AI? The short answer

Anthropic is ahead: its best models beat Mistral AI's in 8 of the 9 kinds of work both are measured on; Mistral AI leads in 1.

  • Pick Anthropic for product listings, decks from an analysis, user surveys, marketing planning, agents and tool use, reasoning and knowledge, writing and sticking to the facts.
  • Pick Mistral AI for speed under pressure.
  • On our overall leaderboard, Claude Opus 5.5 is #1 (85 of 100) and Mistral Large 4 is #17 (37).
  • Prices start at $0.20 per million tokens for Anthropic (Claude Haiku 5.5) and $0.058 for Mistral AI (Mistral Small 3).

Head to head

85Claude Opus 5.5
Best Spring Prompt overall score
37Mistral Large 4
57.6Claude Opus 5.5
Best Intelligence Index
38.4Mistral Large 4
$8.00Claude Opus 5.5
Flagship price, per million tokens
$2.06Mistral Large 4
$0.20Claude Haiku 5.5
Cheapest model, per million tokens
$0.058Mistral Small 3
16
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 6 of 20Claude Opus 5.5 14 of 20Mistral Medium 3.5
Decks from an analysisTurning a finished analysis into a deck you could present as it is 4 of 19Claude Sonnet 5.5 16 of 19Mistral Medium 3.5
User surveysPlanning a user survey and reading its results without being misled 2 of 8Claude Opus 5.5 4 of 8Mistral Large 4
Marketing planningPlanning a year of ad spend without overspending 4 of 19Claude Sonnet 5.5 10 of 19Mistral Large 4
Agents and tool useMulti-step tasks with tools: support desks, coding agents, function calls 1 of 164Claude Sonnet 5.5 21 of 164Mistral Large 4
Professional workReal tasks from banking, consulting and law, business documents and freelance projects 1 of 51Claude Sonnet 5.5 not measured
Reasoning and knowledgeHard questions across science, maths and general knowledge 1 of 198Claude Opus 5.5 44 of 198Mistral Large 4
WritingWhat people prefer in blind comparisons, and judged writing quality 1 of 188Claude Fable 5 86 of 188Mistral Medium 3.5
Sticking to the factsSummarising without inventing things, and factual answers 2 of 152Claude Opus 5.5 9 of 152Mistral Small 3
Speed under pressureGood decisions against a real clock (fast chess) 15 of 22Claude Haiku 5.5 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.

AnthropicMistral AI

020406080 $0.01$0.1$1$10$100 Price per million tokens, blended (log scale) Intelligence Index Claude Opus 5.5Claude Fable 5.1Claude Sonnet 5.5Claude Haiku 5.5Claude Opus 5Claude Fable 5

On our overall leaderboard

The 7 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. #1Claude Opus 5.585
  2. #5Claude Fable 5.166
  3. #7Claude Sonnet 5.564
  4. #13Claude Haiku 5.544
  5. #17Mistral Large 437
  6. #20Mistral Medium 3.518
  7. #22Claude Haiku 4.57

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.

MeasureAnthropicMistral AI
Agents and tool use
Berkeley Function Calling Leaderboard (BFCL) V4 · Overall accuracy · BFCL% correct, higher is better 77.5%Claude Opus 4.5 · 1 of 3837.7%Mistral Medium 3 · 21 of 38
Artificial Analysis · Terminal-Bench 4.0% of tasks, higher is better 63.6%Claude Sonnet 5.5 · 1 of 10526.8%Mistral Large 4 · 17 of 105
Artificial Analysis · Terminal-Bench 2.1% of tasks, higher is better 91.4%Claude Fable 5.1 · 1 of 11550.6%Mistral Medium 3.5 · 58 of 115
Artificial Analysis · τ-bench banking% of tasks, higher is better 47.2%Claude Fable 5.1 · 7 of 11315.1%Mistral Medium 3.5 · 57 of 113
Decks from an analysis
DeckBench · Deck ratingrating, higher is better 1,352Claude Sonnet 5.5 · 4 of 19646Mistral Medium 3.5 · 16 of 19
Marketing planning
ROASBench · Overall scorescore out of 100, higher is better 52.0Claude Sonnet 5.5 · 4 of 1937.0Mistral Large 4 · 10 of 19
Product listings
CatalogBench · Reliably publish-ready% of products, higher is better 55.4%Claude Opus 5.5 · 5 of 2017.9%Mistral Medium 3.5 · 16 of 20
CatalogBench · Reliably publish-ready · sales brief% of products, higher is better 21.4%Claude Opus 5.5 · 7 of 2010.7%Mistral Medium 3.5 · 9 of 20
Reasoning and knowledge
Artificial Analysis · Artificial Analysis Intelligence Indexindex score, higher is better 57.6Claude Opus 5.5 · 1 of 19838.4Mistral Large 4 · 29 of 198
Artificial Analysis · Humanity's Last Exam% of questions, higher is better 61.4%Claude Opus 5.5 · 1 of 19735.0%Mistral Large 4 · 54 of 197
Artificial Analysis · GPQA Diamond% of questions, higher is better 93.7%Claude Fable 5.1 · 8 of 18776.9%Mistral Small 4 · 112 of 187
Speed under pressure
BulletBench · Ladder Elo · Lightning 10+1ladder Elo, higher is better 33Claude Sonnet 5.5 · 12 of 14571Mistral Small 4 · 4 of 14
BulletBench · Ladder Elo · Bullet 60sladder Elo, higher is better 445Claude Haiku 4.5 · 10 of 20572Mistral Medium 3.5 · 6 of 20
Sticking to the facts
Vectara Hallucination Leaderboard · Hallucination rate · Vectara% of summaries, lower is better 9.8%Claude Haiku 4.5 · 43 of 795.1%Mistral Small 3 · 6 of 79
Arena (formerly LMArena) · Overall · Text factualityArena rating, higher is better 1,507Claude Opus 5.5 · 1 of 1131,434Mistral Large 3 · 71 of 113
User surveys
SurveyBench · Analysis ratingrating, higher is better 1,646Claude Opus 5.5 · 2 of 8815Mistral Large 4 · 4 of 8
Writing
Arena (formerly LMArena) · Overall · TextArena rating, higher is better 1,505Claude Opus 4.6 · 1 of 1661,427Mistral Medium 3.5 · 73 of 166
UGI Leaderboard · Writing score · UGIscore out of 100, higher is better 74.2Claude Fable 5 · 3 of 13845.5Mistral Medium 3.5 · 68 of 138

Their models, one against one

Quick answers

Is Anthropic or Mistral AI better?

Anthropic is ahead: its best models beat Mistral AI's in 8 of the 9 kinds of work both are measured on; Mistral AI leads in 1.

What is Anthropic's best model?

Claude Opus 5.5: #1 on the Spring Prompt overall leaderboard and 57.6 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 agents and tool use, Anthropic or Mistral AI?

Anthropic: its best model there, Claude Sonnet 5.5, ranks 1 of 164 models on sale, against 21 for Mistral AI's Mistral Large 4.

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

Anthropic: its best model there, Claude Opus 5.5, ranks 1 of 198 models on sale, against 44 for Mistral AI's Mistral Large 4.

Which is better for writing, Anthropic or Mistral AI?

Anthropic: its best model there, Claude Fable 5, ranks 1 of 188 models on sale, against 86 for Mistral AI's Mistral Medium 3.5.

Which is cheaper, Anthropic 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 $0.20 for Claude Haiku 5.5 from Anthropic.

Other labs compared

Which model is best for your product?

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

Talk to usSee the leaderboard