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GPT-5.4 Mini vs Grok 4.3

Grok 4.3 leads GPT-5.4 Mini on coding, 37.4 to 35.8 on the Vibe Coding Index, and Grok 4.3 costs 1.8x less per output token ($2.50 vs $4.50 per million). Updated October 22, 2026; 80 benchmarks have a result for both.

Replace GPT-5.4 Mini Replace Grok 4.3
GPT-5.4 MiniOpenAI
Coding
35.8
Overall
44.0
Output $/M
$4.50
59
Grok 4.3xAI
Coding
37.4
Overall
53.1
Output $/M
$2.50
20
vs boards won of 80 shared, 1 tied

GPT-5.4 Mini or Grok 4.3: which to pick

GPT-5.4 Mini and Grok 4.3 are level for coding, 35.8 against 37.4 on the Vibe Coding Index, so price and context decide.

Pick GPT-5.4 Mini for work measured by LMArena WebDev or AA Coding Index, where it leads. Pick Grok 4.3 for output tokens 1.8x cheaper ($2.50 vs $4.50 per million) and a lower cost per solved task ($0.31 against $0.70).

Model AGPT-5.4 MiniOpenAI35.8/1005 independent benchmarks$0.70 per solved taskModel BGrok 4.3xAI37.4/1003 independent benchmarks$0.31 per solved task
Shared results
80
GPT-5.4 Mini only
9
Grok 4.3 only
25
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
GPT-5.4 Mini 35.8 from 5 benchmarks, Grok 4.3 37.4 from 3 benchmarks.
Widest category
Agentic work, 9.5 points apart on average over 6 shared benchmarks.
Widest single gap
SAGE (Vals AI): GPT-5.4 Mini 50.8% against Grok 4.3 19.7%, 31.1 points apart on a 0 to 100 scale.
Output price
GPT-5.4 Mini $4.50 against Grok 4.3 $2.50 per million output tokens, 1.8x apart.
Context window
GPT-5.4 Mini takes 400K tokens, Grok 4.3 1M.

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
CategoryGPT-5.4 MiniBarsGrok 4.3Ties
Coding1411 tie
Intelligence01
Agentic work42
Reasoning65
Math42
Knowledge64
General255
All shared boards59201 tie
CodingLike-for-likeSix of these boards feed the Vibe Coding Index141
Coding benchmarks for GPT-5.4 Mini and Grok 4.3
BenchmarkGPT-5.4 MiniGrok 4.3Leader
LMArena WebDev13971358GPT-5.4 Mini
AA Coding Index56.142.2GPT-5.4 Mini
LiveCodeBench (Vals AI)81.5%84.5%Grok 4.3
SWE-bench Verified (Vals AI)73.0%71.4%GPT-5.4 Mini
Terminal-Bench 4 (Vals AI)2.5%Not measuredOnly GPT-5.4 Mini measured
Vibe Code Bench (Vals AI)48.0%19.4%GPT-5.4 Mini
Code migration (Vals AI)12.9%6.8%GPT-5.4 Mini
ProgramBench (Vals AI)0.0%0.0%Tie
Terminal-Bench 2.1 (Vals AI)54.7%42.0%GPT-5.4 Mini
SkillsBench (Vals AI)Not measured40.6%Only Grok 4.3 measured
SciCode52.1%48.3%GPT-5.4 Mini
Terminal-Bench Hard (Artificial Analysis run)52.3%37.9%GPT-5.4 Mini
FrontierCode27.0%Not measuredOnly GPT-5.4 Mini measured
WeirdML60.3%49.9%GPT-5.4 Mini
ALE-Bench1188.6944.2GPT-5.4 Mini
LMArena Text: coding14381415GPT-5.4 Mini
LMArena Text: software and IT14361416GPT-5.4 Mini
LMArena WebDev: React13861353GPT-5.4 Mini
LMArena WebDev: HTML14191367GPT-5.4 Mini
LMArena WebDev: from an imageNot measured1375Only Grok 4.3 measured
Neither model has a result on the other 19 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index01
Intelligence benchmarks for GPT-5.4 Mini and Grok 4.3
BenchmarkGPT-5.4 MiniGrok 4.3Leader
AA Intelligence Index24.124.9Grok 4.3
Epoch Capabilities Index148.7Not measuredOnly GPT-5.4 Mini measured
Agentic workLike-for-likePublic boards, shown as published, kept out of the index42
Agentic work benchmarks for GPT-5.4 Mini and Grok 4.3
BenchmarkGPT-5.4 MiniGrok 4.3Leader
AA Agentic Index17.915.5GPT-5.4 Mini
Design Arena: agents building web appsNot measured1126Only Grok 4.3 measured
Design Arena: agents building full-stack appsNot measured1006Only Grok 4.3 measured
Design Arena: agents building mobile appsNot measured1058Only Grok 4.3 measured
Design Arena: agents building Android appsNot measured962Only Grok 4.3 measured
Design Arena: agents building Godot gamesNot measured914Only Grok 4.3 measured
Design Arena: agents building gamesNot measured1007Only Grok 4.3 measured
Design Arena: HTML slidesNot measured959Only Grok 4.3 measured
Design Arena: PowerPoint slidesNot measured988Only Grok 4.3 measured
Design Arena: spreadsheetsNot measured879Only Grok 4.3 measured
Finance Agent (Vals AI)45.4%37.7%GPT-5.4 Mini
Tax Agent Bench (Vals AI)8.8%6.2%GPT-5.4 Mini
Legal Research Bench (Vals AI)12.5%15.4%Grok 4.3
Excel Modeling Benchmark (Vals AI)45.4%18.4%GPT-5.4 Mini
τ²-Bench Telecom83.3%97.7%Grok 4.3
DeepResearch Bench36.3%Not measuredOnly GPT-5.4 Mini measured
Vending-Bench 2Not measured$35Only Grok 4.3 measured
LMArena SearchNot measured1166Only Grok 4.3 measured
Neither model has a result on the other 23 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index65
Reasoning benchmarks for GPT-5.4 Mini and Grok 4.3
BenchmarkGPT-5.4 MiniGrok 4.3Leader
GPQA Diamond83.1%91.4%Grok 4.3
MMMU Pro (Vals AI)79.3%83.1%Grok 4.3
GPQA Diamond (Artificial Analysis run)87.5%90.1%Grok 4.3
Humanity's Last Exam (Artificial Analysis run)28.1%37.2%Grok 4.3
GPQA Diamond (Epoch AI run)86.9%88.8%Grok 4.3
ARC-AGI63.7%Not measuredOnly GPT-5.4 Mini measured
ARC-AGI-218.9%Not measuredOnly GPT-5.4 Mini measured
Chess puzzles23.0%18.0%GPT-5.4 Mini
Mystery game puzzles11.0%Not measuredOnly GPT-5.4 Mini measured
LMArena Text: hard prompts14241396GPT-5.4 Mini
LMArena Text: expert14351384GPT-5.4 Mini
LMArena Text: hard prompts in English14201402GPT-5.4 Mini
LMArena Vision: diagrams12661241GPT-5.4 Mini
LMArena Vision: homework12851241GPT-5.4 Mini
Kagi LLM Benchmark37.9%Not measuredOnly GPT-5.4 Mini measured
Neither model has a result on the other 7 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index42
Math benchmarks for GPT-5.4 Mini and Grok 4.3
BenchmarkGPT-5.4 MiniGrok 4.3Leader
AIME95.6%Not measuredOnly GPT-5.4 Mini measured
OTIS Mock AIME88.9%93.3%Grok 4.3
FrontierMath, tiers 1 to 351.2%42.8%GPT-5.4 Mini
FrontierMath, tier 49.8%14.6%Grok 4.3
ProofBench21.0%11.0%GPT-5.4 Mini
LMArena Text: math14181387GPT-5.4 Mini
LMArena Text: mathematical work14291396GPT-5.4 Mini
Neither model has a result on the other 6 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index64
Knowledge benchmarks for GPT-5.4 Mini and Grok 4.3
BenchmarkGPT-5.4 MiniGrok 4.3Leader
MMLU Pro84.5%85.8%Grok 4.3
LegalBench (Vals AI)Not measured84.5%Only Grok 4.3 measured
CaseLaw (Vals AI)51.7%79.3%Grok 4.3
CorpFin (Vals AI)60.9%68.5%Grok 4.3
TaxEval (Vals AI)71.2%70.8%GPT-5.4 Mini
MortgageTax (Vals AI)63.5%48.3%GPT-5.4 Mini
MedCode (Vals AI)Not measured38.1%Only Grok 4.3 measured
SimpleQA Verified29.4%33.2%Grok 4.3
LMArena Text: science14171399GPT-5.4 Mini
LMArena Text: medicine and healthcare13951384GPT-5.4 Mini
LMArena Text: legal and government14141386GPT-5.4 Mini
LMArena Text: business and finance14181381GPT-5.4 Mini
Neither model has a result on the other 6 boards here
Web designDirectional onlyPublic boards, shown as published, kept out of the index8 boards, none shared
Web design benchmarks for GPT-5.4 Mini and Grok 4.3
BenchmarkGPT-5.4 MiniGrok 4.3Leader
Design Arena: websitesNot measured1196Only Grok 4.3 measured
Design Arena: UI componentsNot measured1190Only Grok 4.3 measured
Design Arena: game devNot measured1173Only Grok 4.3 measured
Design Arena: data vizNot measured1179Only Grok 4.3 measured
Design Arena: 3DNot measured1124Only Grok 4.3 measured
Design Arena: all code categoriesNot measured1186Only Grok 4.3 measured
Design Arena: SVGNot measured1080Only Grok 4.3 measured
Design Arena: ASCII artNot measured1125Only Grok 4.3 measured
Neither model has a result on the other 1 board here
GeneralLike-for-likePublic boards, shown as published, kept out of the index255
General benchmarks for GPT-5.4 Mini and Grok 4.3
BenchmarkGPT-5.4 MiniGrok 4.3Leader
Public Benefits Bench (Vals AI)Not measured51.7%Only Grok 4.3 measured
SAGE (Vals AI)50.8%19.7%GPT-5.4 Mini
MedScribe (Vals AI)Not measured74.4%Only Grok 4.3 measured
Vals Multimodal Index54.2%43.3%GPT-5.4 Mini
IFBench73.3%83.3%Grok 4.3
Long context reasoning (AA-LCR)77.0%75.0%GPT-5.4 Mini
DTBench80.0%90.7%Grok 4.3
LMCA40.8%38.3%GPT-5.4 Mini
LMArena Text14121397GPT-5.4 Mini
LMArena Text: instruction following14051366GPT-5.4 Mini
LMArena Text: creative writing13701380Grok 4.3
LMArena Vision12451229GPT-5.4 Mini
LMArena Text: English14121404GPT-5.4 Mini
LMArena Text: non-English14051385GPT-5.4 Mini
LMArena Text: Chinese14461422GPT-5.4 Mini
LMArena Text: German14081395GPT-5.4 Mini
LMArena Text: Japanese13751379Grok 4.3
LMArena Text: Korean13701354GPT-5.4 Mini
LMArena Text: French14411411GPT-5.4 Mini
LMArena Text: Spanish14051399GPT-5.4 Mini
LMArena Text: Russian14171399GPT-5.4 Mini
LMArena Text: Polish14151398GPT-5.4 Mini
LMArena Text: multi-turn14291406GPT-5.4 Mini
LMArena Text: longer queries14081393GPT-5.4 Mini
LMArena Text: writing and language13931385GPT-5.4 Mini
LMArena Text: entertainment and media13731370GPT-5.4 Mini
LMArena Vision: English12441235GPT-5.4 Mini
LMArena Vision: Chinese12861257GPT-5.4 Mini
LMArena Vision: reading text12531235GPT-5.4 Mini
LMArena Vision: humor12351222GPT-5.4 Mini
LMArena Vision: recognizing things12181217GPT-5.4 Mini
LMArena Vision: creative writing12221237Grok 4.3
Neither model has a result on the other 14 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for GPT-5.4 Mini and Grok 4.3
BenchmarkGPT-5.4 MiniGrok 4.3Leader
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

GPT-5.4 Mini$0.0030Fits in one request
Grok 4.3$0.0025Fits in one request

Grok 4.3 costs less

Repository review

50K input + 3K output tokens

GPT-5.4 Mini$0.051Fits in one request
Grok 4.3$0.070Fits in one request

GPT-5.4 Mini costs less

Agent loop

200K input + 10K output tokens

GPT-5.4 Mini$0.195Fits in one request
Grok 4.3$0.275Fits in one request

GPT-5.4 Mini 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 GPT-5.4 Mini and Grok 4.3
SpecificationOpenAI GPT-5.4 MiniSpaceXAI Grok 4.3
MakerOpenAIxAI
WeightsNo public weights listedNo public weights listed
ReleasedMarch 17, 2026April 30, 2026
Context window400K1M
Input $/Mtok$0.75$1.25
Output $/Mtok$4.50$2.50
Coding index35.837.4
Independent measurements behind it53
Cost per solved task$0.70$0.31
SourceOpenRouter listingOpenRouter listing

Questions

Is GPT-5.4 Mini better than Grok 4.3 for coding?

GPT-5.4 Mini and Grok 4.3 are level for coding, 35.8 against 37.4 on the Vibe Coding Index, so price and context decide. Pick GPT-5.4 Mini for work measured by LMArena WebDev or AA Coding Index, where it leads. Pick Grok 4.3 for output tokens 1.8x cheaper ($2.50 vs $4.50 per million) and a lower cost per solved task ($0.31 against $0.70).

Which is cheaper, GPT-5.4 Mini or Grok 4.3?

GPT-5.4 Mini costs $0.75 per million input tokens and $4.50 per million output tokens; Grok 4.3 costs $1.25 and $2.50. Per solved SWE-bench Verified task, GPT-5.4 Mini costs $0.70 and Grok 4.3 $0.31.

Which has the bigger context window, GPT-5.4 Mini or Grok 4.3?

Grok 4.3, with 1M tokens against 400K.

How many benchmarks is the GPT-5.4 Mini vs Grok 4.3 comparison based on?

80 benchmarks have a result for both models as of October 22, 2026. GPT-5.4 Mini's coding index rests on 5 independent benchmarks and Grok 4.3's on 3. Where only one model has a result, the page says so instead of naming a winner.

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