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Claude Opus 5 vs Mistral Large 4

Updated October 21, 2026. 78 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.

Replace Claude Opus 5 Replace Mistral Large 4
Claude Opus 5Anthropic
Coding
81.8
Overall
50.8
Output $/M
$25.00
77
Mistral Large 4Mistral AI
Coding
55.3
Overall
38.4
Output $/M
$4.18
1
vs boards won of 78 shared

Decision reading

Pick Claude Opus 5 for coding: it scores 81.8 on the Vibe Coding Index against 55.3 for Mistral Large 4.

Pick Mistral Large 4 when output tokens cost 6.0x less, or when the context window is larger, 1.05M against 1M tokens.

Model AClaude Opus 5Anthropic81.8/1002 independent benchmarks$1.33 per solved taskModel BMistral Large 4Mistral AI55.3/1002 independent benchmarksNo cost per solved task
Shared results
78
Claude Opus 5 only
52
Mistral Large 4 only
3
Like-for-like categories
8 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
Claude Opus 5 81.8 from 2 benchmarks, Mistral Large 4 55.3 from 2 benchmarks.
Widest category
Agentic work, 32.4 points apart on average over 8 shared benchmarks.
Widest single gap
ProofBench: Claude Opus 5 99.0% against Mistral Large 4 10.0%, 89.0 points apart on a 0 to 100 scale.
Output price
Claude Opus 5 $25.00 against Mistral Large 4 $4.18 per million output tokens, 6.0x apart.
Context window
Claude Opus 5 takes 1M tokens, Mistral Large 4 1.05M.

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
CategoryClaude Opus 5BarsMistral Large 4Ties
Coding140
Intelligence20
Agentic work80
Reasoning100
Math60
Knowledge60
Web design90
General221
All shared boards771
CodingLike-for-likeFour of these boards feed the Vibe Coding Index140
Coding benchmarks for Claude Opus 5 and Mistral Large 4
BenchmarkClaude Opus 5Mistral Large 4Leader
LiveBench coding90.8%60.0%Claude Opus 5
LMArena WebDev16891543Claude Opus 5
AA Coding Index78.0Not measuredOnly Claude Opus 5 measured
LiveCodeBench (Vals AI)89.0%Not measuredOnly Claude Opus 5 measured
SWE-bench Verified (Vals AI)97.0%Not measuredOnly Claude Opus 5 measured
Terminal-Bench 4 (Vals AI)53.5%27.8%Claude Opus 5
Vibe Code Bench (Vals AI)88.4%78.4%Claude Opus 5
Code migration (Vals AI)57.5%30.6%Claude Opus 5
ProgramBench (Vals AI)3.0%Not measuredOnly Claude Opus 5 measured
IOI (Vals AI)84.3%45.3%Claude Opus 5
Terminal-Bench 2.1 (Vals AI)84.6%Not measuredOnly Claude Opus 5 measured
SWE-bench Multimodal (Vals AI)Not measured33.1%Only Mistral Large 4 measured
Vibe Code Bench 1-100 (Vals AI)28.5%14.3%Claude Opus 5
SkillsBench (Vals AI)60.4%Not measuredOnly Claude Opus 5 measured
CyberBench (Vals AI)65.4%Not measuredOnly Claude Opus 5 measured
SciCode56.4%54.2%Claude Opus 5
FrontierCode53.4%39.4%Claude Opus 5
FrontierSWE52.0%Not measuredOnly Claude Opus 5 measured
WeirdML91.8%Not measuredOnly Claude Opus 5 measured
ALE-Bench2164.61213.2Claude Opus 5
LMArena Text: coding15331478Claude Opus 5
LMArena Text: software and IT15271467Claude Opus 5
LMArena WebDev: React17111559Claude Opus 5
LMArena WebDev: HTML16801487Claude Opus 5
LMArena WebDev: from an image1662Not measuredOnly Claude Opus 5 measured
Neither model has a result on the other 13 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
Intelligence benchmarks for Claude Opus 5 and Mistral Large 4
BenchmarkClaude Opus 5Mistral Large 4Leader
AA Intelligence Index50.838.4Claude Opus 5
Epoch Capabilities Index163.9150.0Claude Opus 5
Agentic workLike-for-likePublic boards, shown as published, kept out of the index80
Agentic work benchmarks for Claude Opus 5 and Mistral Large 4
BenchmarkClaude Opus 5Mistral Large 4Leader
AA Agentic Index56.5Not measuredOnly Claude Opus 5 measured
Design Arena: agents building web apps1266Not measuredOnly Claude Opus 5 measured
Design Arena: agents building full-stack apps1306Not measuredOnly Claude Opus 5 measured
Design Arena: agents building mobile apps1348Not measuredOnly Claude Opus 5 measured
Design Arena: agents building Android apps1258Not measuredOnly Claude Opus 5 measured
Design Arena: agents building Godot games1279Not measuredOnly Claude Opus 5 measured
Design Arena: agents building games1261Not measuredOnly Claude Opus 5 measured
Design Arena: PowerPoint slides1265Not measuredOnly Claude Opus 5 measured
LiveBench research88.9%28.1%Claude Opus 5
LiveBench browser84.0%8.0%Claude Opus 5
LiveBench long agentic62.1%11.8%Claude Opus 5
SREBench (Vals AI)12.2%Not measuredOnly Claude Opus 5 measured
Finance Agent (Vals AI)58.6%54.7%Claude Opus 5
Tax Agent Bench (Vals AI)45.5%30.4%Claude Opus 5
Legal Research Bench (Vals AI)55.3%31.7%Claude Opus 5
Harvey's Legal Agent Benchmark (Vals AI)Not measured17.5%Only Mistral Large 4 measured
Excel Modeling Benchmark (Vals AI)73.6%56.2%Claude Opus 5
BioMysteryBench (Vals AI)79.3%67.0%Claude Opus 5
Terminal-Bench-Science (Vals AI)27.1%Not measuredOnly Claude Opus 5 measured
Vals Science Index47.9%Not measuredOnly Claude Opus 5 measured
Time Horizon Index (Vals AI)18.8%Not measuredOnly Claude Opus 5 measured
CUA-bench (Vals AI)9.0%Not measuredOnly Claude Opus 5 measured
APEX-Agents65.8%Not measuredOnly Claude Opus 5 measured
OSWorld 2.031.4%Not measuredOnly Claude Opus 5 measured
BALROG63.4%Not measuredOnly Claude Opus 5 measured
PostTrainBench35.0%Not measuredOnly Claude Opus 5 measured
Vending-Bench 2$11,182Not measuredOnly Claude Opus 5 measured
LMArena Search1242Not measuredOnly Claude Opus 5 measured
Neither model has a result on the other 11 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index100
Reasoning benchmarks for Claude Opus 5 and Mistral Large 4
BenchmarkClaude Opus 5Mistral Large 4Leader
GPQA Diamond93.4%Not measuredOnly Claude Opus 5 measured
LiveBench reasoning91.2%83.9%Claude Opus 5
MysteryMechanism (Vals AI)37.4%12.2%Claude Opus 5
MMMU Pro (Vals AI)89.9%Not measuredOnly Claude Opus 5 measured
GPQA Diamond (Artificial Analysis run)93.7%Not measuredOnly Claude Opus 5 measured
Humanity's Last Exam (Artificial Analysis run)54.9%35.0%Claude Opus 5
GPQA Diamond (Epoch AI run)93.9%88.1%Claude Opus 5
ARC-AGI97.5%Not measuredOnly Claude Opus 5 measured
ARC-AGI-290.4%Not measuredOnly Claude Opus 5 measured
SimpleBench80.6%Not measuredOnly Claude Opus 5 measured
Chess puzzles43.0%33.0%Claude Opus 5
Mystery game puzzles59.0%17.0%Claude Opus 5
EBR-bench45.7%Not measuredOnly Claude Opus 5 measured
LMArena Text: hard prompts15271444Claude Opus 5
LMArena Text: expert15541444Claude Opus 5
LMArena Text: hard prompts in English15231442Claude Opus 5
LMArena Vision: diagrams13481288Claude Opus 5
LMArena Vision: homework1338Not measuredOnly Claude Opus 5 measured
Neither model has a result on the other 3 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index60
Math benchmarks for Claude Opus 5 and Mistral Large 4
BenchmarkClaude Opus 5Mistral Large 4Leader
OTIS Mock AIME98.9%98.3%Claude Opus 5
FrontierMath, tiers 1 to 385.6%58.6%Claude Opus 5
FrontierMath, tier 473.2%26.8%Claude Opus 5
ProofBench99.0%10.0%Claude Opus 5
LMArena Text: math15331469Claude Opus 5
LMArena Text: mathematical work15441462Claude Opus 5
Neither model has a result on the other 7 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index60
Knowledge benchmarks for Claude Opus 5 and Mistral Large 4
BenchmarkClaude Opus 5Mistral Large 4Leader
MMLU Pro91.6%Not measuredOnly Claude Opus 5 measured
LegalBench (Vals AI)87.0%Not measuredOnly Claude Opus 5 measured
CorpFin (Vals AI)73.2%Not measuredOnly Claude Opus 5 measured
TaxEval (Vals AI)75.1%Not measuredOnly Claude Opus 5 measured
MortgageTax (Vals AI)72.1%Not measuredOnly Claude Opus 5 measured
MedCode (Vals AI)63.6%40.7%Claude Opus 5
SimpleQA Verified59.9%20.0%Claude Opus 5
LMArena Text: science15311448Claude Opus 5
LMArena Text: medicine and healthcare15251433Claude Opus 5
LMArena Text: legal and government15301425Claude Opus 5
LMArena Text: business and finance15011439Claude Opus 5
Neither model has a result on the other 6 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index90
Web design benchmarks for Claude Opus 5 and Mistral Large 4
BenchmarkClaude Opus 5Mistral Large 4Leader
Design Arena: websites13091258Claude Opus 5
Design Arena: UI components13481275Claude Opus 5
Design Arena: game dev13391226Claude Opus 5
Design Arena: data viz13291274Claude Opus 5
Design Arena: 3D13351253Claude Opus 5
Design Arena: all code categories13241259Claude Opus 5
Design Arena: SVG13101232Claude Opus 5
Design Arena: ASCII art13521203Claude Opus 5
LiveBench design83.0%65.6%Claude Opus 5
GeneralLike-for-likePublic boards, shown as published, kept out of the index221
General benchmarks for Claude Opus 5 and Mistral Large 4
BenchmarkClaude Opus 5Mistral Large 4Leader
LiveBench data analysis74.6%76.5%Mistral Large 4
Public Benefits Bench (Vals AI)76.9%Not measuredOnly Claude Opus 5 measured
SAGE (Vals AI)49.4%Not measuredOnly Claude Opus 5 measured
MedScribe (Vals AI)91.0%80.4%Claude Opus 5
Vals Multimodal Index73.9%Not measuredOnly Claude Opus 5 measured
Long context reasoning (AA-LCR)82.0%81.3%Claude Opus 5
DTBench97.9%88.2%Claude Opus 5
LMCA64.5%35.8%Claude Opus 5
Surface Evolver BenchNot measured28.1%Only Mistral Large 4 measured
Furniture assembly60.8%20.8%Claude Opus 5
LMArena Text15091431Claude Opus 5
LMArena Text: instruction following15181422Claude Opus 5
LMArena Text: creative writing14931363Claude Opus 5
LMArena Vision13201272Claude Opus 5
LMArena Text: English15081433Claude Opus 5
LMArena Text: non-English15021422Claude Opus 5
LMArena Text: Chinese15731492Claude Opus 5
LMArena Text: German1527Not measuredOnly Claude Opus 5 measured
LMArena Text: Japanese15201415Claude Opus 5
LMArena Text: Korean1517Not measuredOnly Claude Opus 5 measured
LMArena Text: French15191492Claude Opus 5
LMArena Text: Spanish15231455Claude Opus 5
LMArena Text: Russian15071417Claude Opus 5
LMArena Text: Polish1522Not measuredOnly Claude Opus 5 measured
LMArena Text: multi-turn15001435Claude Opus 5
LMArena Text: longer queries15171428Claude Opus 5
LMArena Text: writing and language14991386Claude Opus 5
LMArena Text: entertainment and media14811378Claude Opus 5
LMArena Vision: English13151283Claude Opus 5
LMArena Vision: Chinese1400Not measuredOnly Claude Opus 5 measured
LMArena Vision: reading text13291284Claude Opus 5
LMArena Vision: humor1293Not measuredOnly Claude Opus 5 measured
LMArena Vision: creative writing1313Not measuredOnly Claude Opus 5 measured
LMArena Document1516Not measuredOnly Claude Opus 5 measured
Neither model has a result on the other 12 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for Claude Opus 5 and Mistral Large 4
BenchmarkClaude Opus 5Mistral Large 4Leader
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

Claude Opus 5$0.018Fits in one request
Mistral Large 4$0.0034Fits in one request

Mistral Large 4 costs less

Repository review

50K input + 3K output tokens

Claude Opus 5$0.325Fits in one request
Mistral Large 4$0.081Fits in one request

Mistral Large 4 costs less

Agent loop

200K input + 10K output tokens

Claude Opus 5$1.25Fits in one request
Mistral Large 4$0.314Fits in one request

Mistral Large 4 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 Claude Opus 5 and Mistral Large 4
SpecificationAnthropic Claude Opus 5Mistral Large 4
MakerAnthropicMistral AI
WeightsNo public weights listedNo public weights listed
ReleasedJuly 24, 2026October 6, 2026
Context window1M1.05M
Input $/Mtok$5.00$1.36
Output $/Mtok$25.00$4.18
Coding index81.855.3
Independent measurements behind it22
Cost per solved task$1.33Not computable
SourceOpenRouter listingOpenRouter listing

Questions

Is Claude Opus 5 better than Mistral Large 4 for coding?

Pick Claude Opus 5 for coding: it scores 81.8 on the Vibe Coding Index against 55.3 for Mistral Large 4. Pick Mistral Large 4 when output tokens cost 6.0x less, or when the context window is larger, 1.05M against 1M tokens.

Which is cheaper, Claude Opus 5 or Mistral Large 4?

Claude Opus 5 costs $5.00 per million input tokens and $25.00 per million output tokens; Mistral Large 4 costs $1.36 and $4.18. Cost per solved task is known for Claude Opus 5 only.

Which has the bigger context window, Claude Opus 5 or Mistral Large 4?

Mistral Large 4, with 1.05M tokens against 1M.

How many benchmarks is the Claude Opus 5 vs Mistral Large 4 comparison based on?

78 benchmarks have a result for both models as of October 21, 2026. Claude Opus 5's coding index rests on 2 independent benchmarks and Mistral Large 4's on 2. Where only one model has a result, the page says so instead of naming a winner.

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<p style="font:13px/1.4 sans-serif;margin:6px 0 0">Source: <a href="https://llmbenchmark.ai/compare/claude-opus-5-vs-mistral-large-4-0">LLMBenchmark.ai, Claude Opus 5 vs Mistral Large 4</a></p>