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Grok 4.5 vs Mistral Large 4

Grok 4.5 leads Mistral Large 4 on coding, 58.6 to 56.4 on the Vibe Coding Index, and Mistral Large 4 costs 1.4x less per output token ($4.18 vs $6.00 per million). Updated October 21, 2026; 75 benchmarks have a result for both.

Replace Grok 4.5 Replace Mistral Large 4
Grok 4.5xAI
Coding
58.6
Overall
62.1
Output $/M
$6.00
57
Mistral Large 4Mistral AI
Coding
56.4
Overall
54.6
Output $/M
$4.18
18
vs boards won of 75 shared

Grok 4.5 or Mistral Large 4: which to pick

Pick Grok 4.5 for coding: it scores 58.6 on the Vibe Coding Index against 56.4 for Mistral Large 4.

Pick Mistral Large 4 for output tokens 1.4x cheaper ($4.18 vs $6.00 per million) and a larger context window (1.05M against 500K tokens).

Model AGrok 4.5xAI58.6/1006 independent benchmarks$0.62 per solved taskModel BMistral Large 4Mistral AI56.4/1005 independent benchmarksNo cost per solved task
Shared results
75
Grok 4.5 only
48
Mistral Large 4 only
6
Like-for-like categories
8 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
Grok 4.5 58.6 from 6 benchmarks, Mistral Large 4 56.4 from 5 benchmarks.
Widest category
Agentic work, 18.8 points apart on average over 7 shared benchmarks.
Widest single gap
LiveBench research: Grok 4.5 85.9% against Mistral Large 4 28.1%, 57.8 points apart on a 0 to 100 scale.
Output price
Grok 4.5 $6.00 against Mistral Large 4 $4.18 per million output tokens, 1.4x apart.
Context window
Grok 4.5 takes 500K 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
CategoryGrok 4.5BarsMistral Large 4Ties
Coding85
Intelligence20
Agentic work43
Reasoning80
Math24
Knowledge60
Web design72
General204
All shared boards5718
CodingLike-for-likeSix of these boards feed the Vibe Coding Index85
Coding benchmarks for Grok 4.5 and Mistral Large 4
BenchmarkGrok 4.5Mistral Large 4Leader
LiveBench coding94.3%60.0%Grok 4.5
LMArena WebDev15531543Grok 4.5
AA Coding Index72.4Not measuredOnly Grok 4.5 measured
LiveCodeBench (Vals AI)87.3%Not measuredOnly Grok 4.5 measured
SWE-bench Verified (Vals AI)86.6%Not measuredOnly Grok 4.5 measured
Terminal-Bench 4 (Vals AI)8.6%27.8%Mistral Large 4
Vibe Code Bench (Vals AI)69.0%78.4%Mistral Large 4
Code migration (Vals AI)36.6%30.6%Grok 4.5
ProgramBench (Vals AI)0.0%Not measuredOnly Grok 4.5 measured
IOI (Vals AI)40.6%45.3%Mistral Large 4
Terminal-Bench 2.1 (Vals AI)67.8%Not measuredOnly Grok 4.5 measured
SWE-bench Multimodal (Vals AI)Not measured33.1%Only Mistral Large 4 measured
Vibe Code Bench 1-100 (Vals AI)Not measured14.3%Only Mistral Large 4 measured
SkillsBench (Vals AI)66.0%Not measuredOnly Grok 4.5 measured
CyberBench (Vals AI)71.0%Not measuredOnly Grok 4.5 measured
SciCode55.0%54.2%Grok 4.5
FrontierCode42.4%39.4%Grok 4.5
WeirdML46.4%Not measuredOnly Grok 4.5 measured
ALE-Bench1309.31213.2Grok 4.5
LMArena Text: coding14741478Mistral Large 4
LMArena Text: software and IT14711467Grok 4.5
LMArena WebDev: React15561559Mistral Large 4
LMArena WebDev: HTML15671487Grok 4.5
LMArena WebDev: from an image1562Not measuredOnly Grok 4.5 measured
SciCode6.5%Not measuredOnly Grok 4.5 measured
Neither model has a result on the other 14 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
Intelligence benchmarks for Grok 4.5 and Mistral Large 4
BenchmarkGrok 4.5Mistral Large 4Leader
AA Intelligence Index38.838.4Grok 4.5
Epoch Capabilities Index154.1150.0Grok 4.5
Agentic workLike-for-likePublic boards, shown as published, kept out of the index43
Agentic work benchmarks for Grok 4.5 and Mistral Large 4
BenchmarkGrok 4.5Mistral Large 4Leader
AA Agentic Index41.2Not measuredOnly Grok 4.5 measured
Design Arena: agents building web apps1218Not measuredOnly Grok 4.5 measured
Design Arena: agents building full-stack apps1249Not measuredOnly Grok 4.5 measured
Design Arena: agents building mobile apps1221Not measuredOnly Grok 4.5 measured
Design Arena: agents building Android apps1242Not measuredOnly Grok 4.5 measured
Design Arena: agents building Godot games1229Not measuredOnly Grok 4.5 measured
Design Arena: agents building games1236Not measuredOnly Grok 4.5 measured
Design Arena: HTML slides1204Not measuredOnly Grok 4.5 measured
Design Arena: PowerPoint slides1233Not measuredOnly Grok 4.5 measured
LiveBench research85.9%28.1%Grok 4.5
LiveBench browser44.0%8.0%Grok 4.5
LiveBench long agentic27.9%11.8%Grok 4.5
SREBench (Vals AI)0.8%Not measuredOnly Grok 4.5 measured
Finance Agent (Vals AI)48.4%54.7%Mistral Large 4
Tax Agent Bench (Vals AI)24.9%30.4%Mistral Large 4
Legal Research Bench (Vals AI)38.0%31.7%Grok 4.5
Harvey's Legal Agent Benchmark (Vals AI)Not measured17.5%Only Mistral Large 4 measured
Excel Modeling Benchmark (Vals AI)52.9%56.2%Mistral Large 4
BioMysteryBench (Vals AI)Not measured67.0%Only Mistral Large 4 measured
Time Horizon Index (Vals AI)6.3%Not measuredOnly Grok 4.5 measured
APEX-Agents56.2%Not measuredOnly Grok 4.5 measured
PostTrainBench23.4%Not measuredOnly Grok 4.5 measured
Vending-Bench 2$3,887Not measuredOnly Grok 4.5 measured
LMArena Search1216Not measuredOnly Grok 4.5 measured
Neither model has a result on the other 17 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index80
Reasoning benchmarks for Grok 4.5 and Mistral Large 4
BenchmarkGrok 4.5Mistral Large 4Leader
GPQA Diamond92.9%Not measuredOnly Grok 4.5 measured
LiveBench reasoning87.2%83.9%Grok 4.5
MysteryMechanism (Vals AI)Not measured12.2%Only Mistral Large 4 measured
MMMU Pro (Vals AI)61.8%Not measuredOnly Grok 4.5 measured
GPQA Diamond (Artificial Analysis run)93.1%Not measuredOnly Grok 4.5 measured
Humanity's Last Exam (Artificial Analysis run)42.7%35.0%Grok 4.5
GPQA Diamond (Epoch AI run)93.4%88.1%Grok 4.5
ARC-AGI87.2%Not measuredOnly Grok 4.5 measured
ARC-AGI-252.6%Not measuredOnly Grok 4.5 measured
SimpleBench70.0%Not measuredOnly Grok 4.5 measured
Chess puzzles35.0%33.0%Grok 4.5
Mystery game puzzlesNot measured17.0%Only Mistral Large 4 measured
LMArena Text: hard prompts14621444Grok 4.5
LMArena Text: expert14651444Grok 4.5
LMArena Text: hard prompts in English14641442Grok 4.5
LMArena Vision: diagrams13041288Grok 4.5
LMArena Vision: homework1295Not measuredOnly Grok 4.5 measured
Kagi LLM Benchmark83.5%Not measuredOnly Grok 4.5 measured
Neither model has a result on the other 4 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index24
Math benchmarks for Grok 4.5 and Mistral Large 4
BenchmarkGrok 4.5Mistral Large 4Leader
OTIS Mock AIME97.8%98.3%Mistral Large 4
FrontierMath, tiers 1 to 357.2%58.6%Mistral Large 4
FrontierMath, tier 424.4%26.8%Mistral Large 4
ProofBench31.0%10.0%Grok 4.5
LMArena Text: math14601469Mistral Large 4
LMArena Text: mathematical work14821462Grok 4.5
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 Grok 4.5 and Mistral Large 4
BenchmarkGrok 4.5Mistral Large 4Leader
MMLU Pro89.2%Not measuredOnly Grok 4.5 measured
LegalBench (Vals AI)86.0%Not measuredOnly Grok 4.5 measured
CorpFin (Vals AI)67.4%Not measuredOnly Grok 4.5 measured
TaxEval (Vals AI)71.7%Not measuredOnly Grok 4.5 measured
MortgageTax (Vals AI)61.8%Not measuredOnly Grok 4.5 measured
MedCode (Vals AI)43.3%40.7%Grok 4.5
SimpleQA Verified48.3%20.0%Grok 4.5
LMArena Text: science14641448Grok 4.5
LMArena Text: medicine and healthcare14401433Grok 4.5
LMArena Text: legal and government14631425Grok 4.5
LMArena Text: business and finance14411439Grok 4.5
FACTS Benchmark Suite50.2%Not measuredOnly Grok 4.5 measured
Neither model has a result on the other 6 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index72
Web design benchmarks for Grok 4.5 and Mistral Large 4
BenchmarkGrok 4.5Mistral Large 4Leader
Design Arena: websites12811258Grok 4.5
Design Arena: UI components12791275Grok 4.5
Design Arena: game dev12631226Grok 4.5
Design Arena: data viz12661274Mistral Large 4
Design Arena: 3D12571253Grok 4.5
Design Arena: all code categories12751259Grok 4.5
Design Arena: SVG12151233Mistral Large 4
Design Arena: ASCII art12571202Grok 4.5
LiveBench design78.1%65.6%Grok 4.5
GeneralLike-for-likePublic boards, shown as published, kept out of the index204
General benchmarks for Grok 4.5 and Mistral Large 4
BenchmarkGrok 4.5Mistral Large 4Leader
LiveBench data analysis73.0%76.5%Mistral Large 4
SAGE (Vals AI)35.0%Not measuredOnly Grok 4.5 measured
MedScribe (Vals AI)86.9%80.4%Grok 4.5
Vals Multimodal Index63.4%Not measuredOnly Grok 4.5 measured
Long context reasoning (AA-LCR)79.3%81.3%Mistral Large 4
DTBench96.5%88.2%Grok 4.5
LMCA45.2%35.8%Grok 4.5
Surface Evolver Bench74.4%28.1%Grok 4.5
Furniture assembly22.5%20.8%Grok 4.5
LMArena Text14481431Grok 4.5
LMArena Text: instruction following14451422Grok 4.5
LMArena Text: creative writing14421363Grok 4.5
LMArena Vision12871272Grok 4.5
LMArena Text: English14531433Grok 4.5
LMArena Text: non-English14401422Grok 4.5
LMArena Text: Chinese14951492Grok 4.5
LMArena Text: German1448Not measuredOnly Grok 4.5 measured
LMArena Text: Japanese14301415Grok 4.5
LMArena Text: Korean1406Not measuredOnly Grok 4.5 measured
LMArena Text: French14571492Mistral Large 4
LMArena Text: Spanish14511455Mistral Large 4
LMArena Text: Russian14491417Grok 4.5
LMArena Text: Polish1432Not measuredOnly Grok 4.5 measured
LMArena Text: multi-turn14561435Grok 4.5
LMArena Text: longer queries14621428Grok 4.5
LMArena Text: writing and language14451386Grok 4.5
LMArena Text: entertainment and media14341378Grok 4.5
LMArena Vision: English12851283Grok 4.5
LMArena Vision: Chinese1345Not measuredOnly Grok 4.5 measured
LMArena Vision: reading text12931284Grok 4.5
LMArena Vision: humor1276Not measuredOnly Grok 4.5 measured
LMArena Vision: creative writing1293Not measuredOnly Grok 4.5 measured
LMArena Document1452Not measuredOnly Grok 4.5 measured
Neither model has a result on the other 13 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for Grok 4.5 and Mistral Large 4
BenchmarkGrok 4.5Mistral 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

Grok 4.5$0.0050Fits in one request
Mistral Large 4$0.0034Fits in one request

Mistral Large 4 costs less

Repository review

50K input + 3K output tokens

Grok 4.5$0.118Fits in one request
Mistral Large 4$0.081Fits in one request

Mistral Large 4 costs less

Agent loop

200K input + 10K output tokens

Grok 4.5$0.460Fits 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 Grok 4.5 and Mistral Large 4
SpecificationSpaceXAI Grok 4.5Mistral Large 4
MakerxAIMistral AI
WeightsNo public weights listedNo public weights listed
ReleasedJuly 8, 2026October 6, 2026
Context window500K1.05M
Input $/Mtok$2.00$1.36
Output $/Mtok$6.00$4.18
Coding index58.656.4
Independent measurements behind it65
Cost per solved task$0.62Not computable
SourceOpenRouter listingOpenRouter listing

Questions

Is Grok 4.5 better than Mistral Large 4 for coding?

Pick Grok 4.5 for coding: it scores 58.6 on the Vibe Coding Index against 56.4 for Mistral Large 4. Pick Mistral Large 4 for output tokens 1.4x cheaper ($4.18 vs $6.00 per million) and a larger context window (1.05M against 500K tokens).

Which is cheaper, Grok 4.5 or Mistral Large 4?

Grok 4.5 costs $2.00 per million input tokens and $6.00 per million output tokens; Mistral Large 4 costs $1.36 and $4.18. Cost per solved task is known for Grok 4.5 only.

Which has the bigger context window, Grok 4.5 or Mistral Large 4?

Mistral Large 4, with 1.05M tokens against 500K.

How many benchmarks is the Grok 4.5 vs Mistral Large 4 comparison based on?

75 benchmarks have a result for both models as of October 21, 2026. Grok 4.5's coding index rests on 6 independent benchmarks and Mistral Large 4's on 5. 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/grok-4-5-vs-mistral-large-4-0">LLMBenchmark.ai, Grok 4.5 vs Mistral Large 4</a></p>