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GPT-4o (2024-08-06) vs Grok 4.3

Grok 4.3 leads GPT-4o (2024-08-06) on the Artificial Analysis Intelligence Index, 24.9 to 7.7, and Grok 4.3 costs 4.0x less per output token ($2.50 vs $10.00 per million). Updated October 22, 2026; 48 benchmarks have a result for both.

Replace GPT-4o (2024-08-06) Replace Grok 4.3
GPT-4o (2024-08-06)OpenAI
Coding
No data
Overall
26.3
Output $/M
$10.00
2
Grok 4.3xAI
Coding
37.4
Overall
53.1
Output $/M
$2.50
46
vs boards won of 48 shared

GPT-4o (2024-08-06) or Grok 4.3: which to pick

Only Grok 4.3 has a coding score, 37.4 on the Vibe Coding Index; GPT-4o (2024-08-06) has none, so the two cannot be ranked on coding.

Pick GPT-4o (2024-08-06) for work measured by TaxEval (Vals AI) or MortgageTax (Vals AI), where it leads.

Model AGPT-4o (2024-08-06)OpenAINot benchmarkedNo coding benchmarkNo cost per solved taskModel BGrok 4.3xAI37.4/1003 independent benchmarks$0.31 per solved task
Shared results
48
GPT-4o (2024-08-06) only
10
Grok 4.3 only
57
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-4o (2024-08-06) not benchmarked, Grok 4.3 37.4 from 3 benchmarks.
Widest category
Agentic work, 68.7 points apart on average over 1 shared benchmark.
Widest single gap
OTIS Mock AIME: GPT-4o (2024-08-06) 6.4% against Grok 4.3 93.3%, 86.9 points apart on a 0 to 100 scale.
Output price
GPT-4o (2024-08-06) $10.00 against Grok 4.3 $2.50 per million output tokens, 4.0x apart.
Context window
GPT-4o (2024-08-06) takes 128K 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-4o (2024-08-06)BarsGrok 4.3Ties
Coding03
Intelligence01
Agentic work01
Reasoning08
Math04
Knowledge28
General021
All shared boards246
CodingLike-for-likeSix of these boards feed the Vibe Coding Index03
Coding benchmarks for GPT-4o (2024-08-06) and Grok 4.3
BenchmarkGPT-4o (2024-08-06)Grok 4.3Leader
Aider polyglot23.1%Not measuredOnly GPT-4o (2024-08-06) measured
SWE-bench Lite21.7%Not measuredOnly GPT-4o (2024-08-06) measured
LMArena WebDevNot measured1358Only Grok 4.3 measured
AA Coding IndexNot measured42.2Only Grok 4.3 measured
LiveCodeBench (Vals AI)Not measured84.5%Only Grok 4.3 measured
SWE-bench Verified (Vals AI)Not measured71.4%Only Grok 4.3 measured
Vibe Code Bench (Vals AI)Not measured19.4%Only Grok 4.3 measured
Code migration (Vals AI)Not measured6.8%Only Grok 4.3 measured
ProgramBench (Vals AI)Not measured0.0%Only Grok 4.3 measured
Terminal-Bench 2.1 (Vals AI)Not measured42.0%Only Grok 4.3 measured
SkillsBench (Vals AI)Not measured40.6%Only Grok 4.3 measured
LiveCodeBench (Artificial Analysis run)31.7%Not measuredOnly GPT-4o (2024-08-06) measured
SciCodeNot measured48.3%Only Grok 4.3 measured
Terminal-Bench Hard (Artificial Analysis run)8.3%37.9%Grok 4.3
WeirdMLNot measured49.9%Only Grok 4.3 measured
ALE-BenchNot measured944.2Only Grok 4.3 measured
LMArena Text: coding12831415Grok 4.3
LMArena Text: software and IT12781416Grok 4.3
LMArena WebDev: ReactNot measured1353Only Grok 4.3 measured
LMArena WebDev: HTMLNot measured1367Only Grok 4.3 measured
LMArena WebDev: from an imageNot measured1375Only Grok 4.3 measured
Neither model has a result on the other 18 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index01
Intelligence benchmarks for GPT-4o (2024-08-06) and Grok 4.3
BenchmarkGPT-4o (2024-08-06)Grok 4.3Leader
AA Intelligence Index7.724.9Grok 4.3
Neither model has a result on the other 1 board here
Agentic workLike-for-likePublic boards, shown as published, kept out of the index01
Agentic work benchmarks for GPT-4o (2024-08-06) and Grok 4.3
BenchmarkGPT-4o (2024-08-06)Grok 4.3Leader
AA Agentic IndexNot measured15.5Only Grok 4.3 measured
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)Not measured37.7%Only Grok 4.3 measured
Tax Agent Bench (Vals AI)Not measured6.2%Only Grok 4.3 measured
Legal Research Bench (Vals AI)Not measured15.4%Only Grok 4.3 measured
Excel Modeling Benchmark (Vals AI)Not measured18.4%Only Grok 4.3 measured
τ²-Bench Telecom28.9%97.7%Grok 4.3
Vending-Bench 2Not measured$35Only Grok 4.3 measured
LMArena SearchNot measured1166Only Grok 4.3 measured
Neither model has a result on the other 24 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index08
Reasoning benchmarks for GPT-4o (2024-08-06) and Grok 4.3
BenchmarkGPT-4o (2024-08-06)Grok 4.3Leader
GPQA DiamondNot measured91.4%Only Grok 4.3 measured
MMMU Pro (Vals AI)64.0%83.1%Grok 4.3
GPQA Diamond (Artificial Analysis run)52.1%90.1%Grok 4.3
Humanity's Last Exam (Artificial Analysis run)2.3%37.2%Grok 4.3
GPQA Diamond (Epoch AI run)49.2%88.8%Grok 4.3
SimpleBench17.8%Not measuredOnly GPT-4o (2024-08-06) measured
Chess puzzles6.0%18.0%Grok 4.3
LMArena Text: hard prompts12641396Grok 4.3
LMArena Text: expert12411384Grok 4.3
LMArena Text: hard prompts in English12771402Grok 4.3
LMArena Vision: diagramsNot measured1241Only Grok 4.3 measured
LMArena Vision: homeworkNot measured1241Only Grok 4.3 measured
Neither model has a result on the other 10 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index04
Math benchmarks for GPT-4o (2024-08-06) and Grok 4.3
BenchmarkGPT-4o (2024-08-06)Grok 4.3Leader
AIME14.0%Not measuredOnly GPT-4o (2024-08-06) measured
MATH 500 (Vals AI)75.2%Not measuredOnly GPT-4o (2024-08-06) measured
MGSM (Vals AI)90.7%Not measuredOnly GPT-4o (2024-08-06) measured
OTIS Mock AIME6.4%93.3%Grok 4.3
FrontierMath, tiers 1 to 30.4%42.8%Grok 4.3
FrontierMath, tier 4Not measured14.6%Only Grok 4.3 measured
ProofBenchNot measured11.0%Only Grok 4.3 measured
MATH level 553.3%Not measuredOnly GPT-4o (2024-08-06) measured
LMArena Text: math12851387Grok 4.3
LMArena Text: mathematical work12831396Grok 4.3
Neither model has a result on the other 3 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index28
Knowledge benchmarks for GPT-4o (2024-08-06) and Grok 4.3
BenchmarkGPT-4o (2024-08-06)Grok 4.3Leader
MMLU Pro74.1%85.8%Grok 4.3
LegalBench (Vals AI)80.1%84.5%Grok 4.3
CaseLaw (Vals AI)Not measured79.3%Only Grok 4.3 measured
CorpFin (Vals AI)39.4%68.5%Grok 4.3
TaxEval (Vals AI)71.1%70.8%GPT-4o (2024-08-06)
MortgageTax (Vals AI)61.0%48.3%GPT-4o (2024-08-06)
MedQA (Vals AI)88.2%Not measuredOnly GPT-4o (2024-08-06) measured
MedCode (Vals AI)Not measured38.1%Only Grok 4.3 measured
SimpleQA Verified26.0%33.2%Grok 4.3
MMLU84.3%Not measuredOnly GPT-4o (2024-08-06) measured
LMArena Text: science12741399Grok 4.3
LMArena Text: medicine and healthcare12521384Grok 4.3
LMArena Text: legal and government12751386Grok 4.3
LMArena Text: business and finance12321381Grok 4.3
Neither model has a result on the other 4 boards here
Web designDirectional onlyPublic boards, shown as published, kept out of the index8 boards, none shared
Web design benchmarks for GPT-4o (2024-08-06) and Grok 4.3
BenchmarkGPT-4o (2024-08-06)Grok 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 index021
General benchmarks for GPT-4o (2024-08-06) and Grok 4.3
BenchmarkGPT-4o (2024-08-06)Grok 4.3Leader
Public Benefits Bench (Vals AI)Not measured51.7%Only Grok 4.3 measured
SAGE (Vals AI)Not measured19.7%Only Grok 4.3 measured
MedScribe (Vals AI)Not measured74.4%Only Grok 4.3 measured
Vals Multimodal IndexNot measured43.3%Only Grok 4.3 measured
IFBench36.0%83.3%Grok 4.3
Long context reasoning (AA-LCR)41.0%75.0%Grok 4.3
DTBenchNot measured90.7%Only Grok 4.3 measured
LMCANot measured38.3%Only Grok 4.3 measured
LMArena Text12831397Grok 4.3
LMArena Text: instruction following12671366Grok 4.3
LMArena Text: creative writing12741380Grok 4.3
LMArena Vision10651229Grok 4.3
LMArena Text: English12971404Grok 4.3
LMArena Text: non-English12621385Grok 4.3
LMArena Text: Chinese12541422Grok 4.3
LMArena Text: German12571395Grok 4.3
LMArena Text: Japanese12341379Grok 4.3
LMArena Text: Korean12181354Grok 4.3
LMArena Text: French12631411Grok 4.3
LMArena Text: Spanish12691399Grok 4.3
LMArena Text: Russian12721399Grok 4.3
LMArena Text: PolishNot measured1398Only Grok 4.3 measured
LMArena Text: multi-turn12791406Grok 4.3
LMArena Text: longer queries12831393Grok 4.3
LMArena Text: writing and language12901385Grok 4.3
LMArena Text: entertainment and media12671370Grok 4.3
LMArena Vision: English10721235Grok 4.3
LMArena Vision: Chinese10091257Grok 4.3
LMArena Vision: reading textNot measured1235Only Grok 4.3 measured
LMArena Vision: humorNot measured1222Only Grok 4.3 measured
LMArena Vision: recognizing thingsNot measured1217Only Grok 4.3 measured
LMArena Vision: creative writingNot measured1237Only Grok 4.3 measured
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-4o (2024-08-06) and Grok 4.3
BenchmarkGPT-4o (2024-08-06)Grok 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-4o (2024-08-06)$0.0075Fits in one request
Grok 4.3$0.0025Fits in one request

Grok 4.3 costs less

Repository review

50K input + 3K output tokens

GPT-4o (2024-08-06)$0.155Fits in one request
Grok 4.3$0.070Fits in one request

Grok 4.3 costs less

Agent loop

200K input + 10K output tokens

GPT-4o (2024-08-06)$0.600Exceeds the context window
Grok 4.3$0.275Fits in one request

Grok 4.3 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-4o (2024-08-06) and Grok 4.3
SpecificationOpenAI GPT-4o (2024-08-06)SpaceXAI Grok 4.3
MakerOpenAIxAI
WeightsNo public weights listedNo public weights listed
ReleasedAugust 6, 2024April 30, 2026
Context window128K1M
Input $/Mtok$2.50$1.25
Output $/Mtok$10.00$2.50
Coding indexNot benchmarked37.4
Independent measurements behind it03
Cost per solved taskNot computable$0.31
SourceOpenRouter listingOpenRouter listing

Questions

Is GPT-4o (2024-08-06) better than Grok 4.3 for coding?

Only Grok 4.3 has a coding score, 37.4 on the Vibe Coding Index; GPT-4o (2024-08-06) has none, so the two cannot be ranked on coding. Pick GPT-4o (2024-08-06) for work measured by TaxEval (Vals AI) or MortgageTax (Vals AI), where it leads.

Which is cheaper, GPT-4o (2024-08-06) or Grok 4.3?

GPT-4o (2024-08-06) costs $2.50 per million input tokens and $10.00 per million output tokens; Grok 4.3 costs $1.25 and $2.50. Cost per solved task is known for Grok 4.3 only.

Which has the bigger context window, GPT-4o (2024-08-06) or Grok 4.3?

Grok 4.3, with 1M tokens against 128K.

How many benchmarks is the GPT-4o (2024-08-06) vs Grok 4.3 comparison based on?

48 benchmarks have a result for both models as of October 22, 2026. GPT-4o (2024-08-06)'s coding index rests on 0 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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