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Grok 4.3 vs Grok 4.6

Grok 4.6 leads Grok 4.3 on coding, 65.7 to 37.4 on the Vibe Coding Index, and Grok 4.3 costs 2.4x less per output token ($2.50 vs $6.00 per million). Updated October 22, 2026; 96 benchmarks have a result for both.

Replace Grok 4.3 Replace Grok 4.6
Grok 4.3xAI
Coding
37.4
Overall
53.1
Output $/M
$2.50
2
Grok 4.6xAI
Coding
65.7
Overall
67.4
Output $/M
$6.00
94
vs boards won of 96 shared

Grok 4.3 or Grok 4.6: which to pick

Pick Grok 4.6 for coding: it scores 65.7 on the Vibe Coding Index against 37.4 for Grok 4.3.

Pick Grok 4.3 for output tokens 2.4x cheaper ($2.50 vs $6.00 per million) and a lower cost per solved task ($0.31 against $0.82).

Model AGrok 4.3xAI37.4/1003 independent benchmarks$0.31 per solved taskModel BGrok 4.6xAI65.7/1006 independent benchmarks$0.82 per solved task
Shared results
96
Grok 4.3 only
9
Grok 4.6 only
27
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 4.3 37.4 from 3 benchmarks, Grok 4.6 65.7 from 6 benchmarks.
Widest category
Agentic work, 33.0 points apart on average over 14 shared benchmarks.
Widest single gap
Vibe Code Bench (Vals AI): Grok 4.3 19.4% against Grok 4.6 76.2%, 56.8 points apart on a 0 to 100 scale.
Output price
Grok 4.3 $2.50 against Grok 4.6 $6.00 per million output tokens, 2.4x apart.
Context window
Grok 4.3 takes 1M tokens, Grok 4.6 500K.

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 4.3BarsGrok 4.6Ties
Coding017
Intelligence01
Agentic work014
Reasoning010
Math06
Knowledge110
Web design08
General128
All shared boards294
CodingLike-for-likeSix of these boards feed the Vibe Coding Index017
Coding benchmarks for Grok 4.3 and Grok 4.6
BenchmarkGrok 4.3Grok 4.6Leader
LiveBench codingNot measured89.1%Only Grok 4.6 measured
LMArena WebDev13581617Grok 4.6
AA Coding Index42.276.8Grok 4.6
LiveCodeBench (Vals AI)84.5%88.2%Grok 4.6
SWE-bench Verified (Vals AI)71.4%95.6%Grok 4.6
Terminal-Bench 4 (Vals AI)Not measured17.2%Only Grok 4.6 measured
Vibe Code Bench (Vals AI)19.4%76.2%Grok 4.6
Code migration (Vals AI)6.8%44.6%Grok 4.6
ProgramBench (Vals AI)0.0%1.0%Grok 4.6
IOI (Vals AI)Not measured47.6%Only Grok 4.6 measured
Terminal-Bench 2.1 (Vals AI)42.0%78.3%Grok 4.6
Vibe Code Bench 1-100 (Vals AI)Not measured14.8%Only Grok 4.6 measured
SkillsBench (Vals AI)40.6%55.8%Grok 4.6
CyberBench (Vals AI)Not measured67.7%Only Grok 4.6 measured
SciCode48.3%56.5%Grok 4.6
Terminal-Bench Hard (Artificial Analysis run)37.9%Not measuredOnly Grok 4.3 measured
FrontierCodeNot measured48.0%Only Grok 4.6 measured
FrontierSWENot measured25.3%Only Grok 4.6 measured
WeirdML49.9%67.3%Grok 4.6
ALE-Bench944.21508.1Grok 4.6
LMArena Text: coding14151466Grok 4.6
LMArena Text: software and IT14161457Grok 4.6
LMArena WebDev: React13531631Grok 4.6
LMArena WebDev: HTML13671597Grok 4.6
LMArena WebDev: from an image13751603Grok 4.6
Neither model has a result on the other 14 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index01
Intelligence benchmarks for Grok 4.3 and Grok 4.6
BenchmarkGrok 4.3Grok 4.6Leader
AA Intelligence Index24.944.3Grok 4.6
Epoch Capabilities IndexNot measured156.6Only Grok 4.6 measured
Agentic workLike-for-likePublic boards, shown as published, kept out of the index014
Agentic work benchmarks for Grok 4.3 and Grok 4.6
BenchmarkGrok 4.3Grok 4.6Leader
AA Agentic Index15.553.0Grok 4.6
Design Arena: agents building web apps11261248Grok 4.6
Design Arena: agents building full-stack apps10061264Grok 4.6
Design Arena: agents building mobile apps10581234Grok 4.6
Design Arena: agents building Android apps9621291Grok 4.6
Design Arena: agents building Godot games9141276Grok 4.6
Design Arena: agents building games10071209Grok 4.6
Design Arena: HTML slides9591250Grok 4.6
Design Arena: PowerPoint slides9881237Grok 4.6
Design Arena: spreadsheets879Not measuredOnly Grok 4.3 measured
LiveBench researchNot measured84.5%Only Grok 4.6 measured
LiveBench browserNot measured64.0%Only Grok 4.6 measured
LiveBench long agenticNot measured40.7%Only Grok 4.6 measured
Finance Agent (Vals AI)37.7%53.7%Grok 4.6
Tax Agent Bench (Vals AI)6.2%33.1%Grok 4.6
Legal Research Bench (Vals AI)15.4%48.1%Grok 4.6
Excel Modeling Benchmark (Vals AI)18.4%62.7%Grok 4.6
BioMysteryBench (Vals AI)Not measured72.2%Only Grok 4.6 measured
Terminal-Bench-Science (Vals AI)Not measured11.4%Only Grok 4.6 measured
Vals Science IndexNot measured38.1%Only Grok 4.6 measured
Time Horizon Index (Vals AI)Not measured5.8%Only Grok 4.6 measured
τ²-Bench Telecom97.7%Not measuredOnly Grok 4.3 measured
APEX-AgentsNot measured65.3%Only Grok 4.6 measured
Vending-Bench 2$35$9,047Grok 4.6
LMArena Search1166Not measuredOnly Grok 4.3 measured
Neither model has a result on the other 16 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index010
Reasoning benchmarks for Grok 4.3 and Grok 4.6
BenchmarkGrok 4.3Grok 4.6Leader
GPQA Diamond91.4%94.7%Grok 4.6
LiveBench reasoningNot measured91.2%Only Grok 4.6 measured
MysteryMechanism (Vals AI)Not measured30.6%Only Grok 4.6 measured
MMMU Pro (Vals AI)83.1%Not measuredOnly Grok 4.3 measured
GPQA Diamond (Artificial Analysis run)90.1%94.9%Grok 4.6
Humanity's Last Exam (Artificial Analysis run)37.2%44.1%Grok 4.6
GPQA Diamond (Epoch AI run)88.8%94.0%Grok 4.6
ARC-AGINot measured87.5%Only Grok 4.6 measured
ARC-AGI-2Not measured67.1%Only Grok 4.6 measured
SimpleBenchNot measured75.9%Only Grok 4.6 measured
Chess puzzles18.0%33.0%Grok 4.6
Mystery game puzzlesNot measured34.0%Only Grok 4.6 measured
EBR-benchNot measured30.5%Only Grok 4.6 measured
LMArena Text: hard prompts13961448Grok 4.6
LMArena Text: expert13841469Grok 4.6
LMArena Text: hard prompts in English14021445Grok 4.6
LMArena Vision: diagrams12411285Grok 4.6
LMArena Vision: homework12411283Grok 4.6
Neither model has a result on the other 4 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index06
Math benchmarks for Grok 4.3 and Grok 4.6
BenchmarkGrok 4.3Grok 4.6Leader
OTIS Mock AIME93.3%99.2%Grok 4.6
FrontierMath, tiers 1 to 342.8%66.0%Grok 4.6
FrontierMath, tier 414.6%31.7%Grok 4.6
ProofBench11.0%51.0%Grok 4.6
LMArena Text: math13871417Grok 4.6
LMArena Text: mathematical work13961464Grok 4.6
Neither model has a result on the other 7 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index110
Knowledge benchmarks for Grok 4.3 and Grok 4.6
BenchmarkGrok 4.3Grok 4.6Leader
MMLU Pro85.8%89.4%Grok 4.6
LegalBench (Vals AI)84.5%86.3%Grok 4.6
CaseLaw (Vals AI)79.3%Not measuredOnly Grok 4.3 measured
CorpFin (Vals AI)68.5%66.2%Grok 4.3
TaxEval (Vals AI)70.8%71.1%Grok 4.6
MortgageTax (Vals AI)48.3%64.2%Grok 4.6
MedCode (Vals AI)38.1%44.7%Grok 4.6
SimpleQA Verified33.2%49.3%Grok 4.6
LMArena Text: science13991437Grok 4.6
LMArena Text: medicine and healthcare13841420Grok 4.6
LMArena Text: legal and government13861429Grok 4.6
LMArena Text: business and finance13811416Grok 4.6
Neither model has a result on the other 6 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index08
Web design benchmarks for Grok 4.3 and Grok 4.6
BenchmarkGrok 4.3Grok 4.6Leader
Design Arena: websites11961289Grok 4.6
Design Arena: UI components11901294Grok 4.6
Design Arena: game dev11731296Grok 4.6
Design Arena: data viz11791282Grok 4.6
Design Arena: 3D11241277Grok 4.6
Design Arena: all code categories11861292Grok 4.6
Design Arena: SVG10801240Grok 4.6
Design Arena: ASCII art11251279Grok 4.6
LiveBench designNot measured79.8%Only Grok 4.6 measured
GeneralLike-for-likePublic boards, shown as published, kept out of the index128
General benchmarks for Grok 4.3 and Grok 4.6
BenchmarkGrok 4.3Grok 4.6Leader
LiveBench data analysisNot measured75.3%Only Grok 4.6 measured
Public Benefits Bench (Vals AI)51.7%66.8%Grok 4.6
SAGE (Vals AI)19.7%28.9%Grok 4.6
MedScribe (Vals AI)74.4%86.5%Grok 4.6
Vals Multimodal Index43.3%Not measuredOnly Grok 4.3 measured
IFBench83.3%Not measuredOnly Grok 4.3 measured
Long context reasoning (AA-LCR)75.0%81.0%Grok 4.6
DTBench90.7%97.3%Grok 4.6
LMCA38.3%48.5%Grok 4.6
Furniture assemblyNot measured40.0%Only Grok 4.6 measured
LMArena Text13971429Grok 4.6
LMArena Text: instruction following13661431Grok 4.6
LMArena Text: creative writing13801426Grok 4.6
LMArena Vision12291263Grok 4.6
LMArena Text: English14041433Grok 4.6
LMArena Text: non-English13851420Grok 4.6
LMArena Text: Chinese14221476Grok 4.6
LMArena Text: German13951426Grok 4.6
LMArena Text: Japanese13791378Grok 4.3
LMArena Text: Korean13541391Grok 4.6
LMArena Text: French14111455Grok 4.6
LMArena Text: Spanish13991414Grok 4.6
LMArena Text: Russian13991421Grok 4.6
LMArena Text: Polish13981430Grok 4.6
LMArena Text: multi-turn14061425Grok 4.6
LMArena Text: longer queries13931456Grok 4.6
LMArena Text: writing and language13851429Grok 4.6
LMArena Text: entertainment and media13701421Grok 4.6
LMArena Vision: English12351270Grok 4.6
LMArena Vision: Chinese12571289Grok 4.6
LMArena Vision: reading text12351272Grok 4.6
LMArena Vision: humor12221270Grok 4.6
LMArena Vision: recognizing things1217Not measuredOnly Grok 4.3 measured
LMArena Vision: creative writing12371262Grok 4.6
LMArena DocumentNot measured1452Only Grok 4.6 measured
Neither model has a result on the other 11 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for Grok 4.3 and Grok 4.6
BenchmarkGrok 4.3Grok 4.6Leader
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 4.3$0.0025Fits in one request
Grok 4.6$0.0050Fits in one request

Grok 4.3 costs less

Repository review

50K input + 3K output tokens

Grok 4.3$0.070Fits in one request
Grok 4.6$0.118Fits in one request

Grok 4.3 costs less

Agent loop

200K input + 10K output tokens

Grok 4.3$0.275Fits in one request
Grok 4.6$0.460Fits 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 Grok 4.3 and Grok 4.6
SpecificationSpaceXAI Grok 4.3SpaceXAI Grok 4.6
MakerxAIxAI
WeightsNo public weights listedNo public weights listed
ReleasedApril 30, 2026August 12, 2026
Context window1M500K
Input $/Mtok$1.25$2.00
Output $/Mtok$2.50$6.00
Coding index37.465.7
Independent measurements behind it36
Cost per solved task$0.31$0.82
SourceOpenRouter listingOpenRouter listing

Questions

Is Grok 4.3 better than Grok 4.6 for coding?

Pick Grok 4.6 for coding: it scores 65.7 on the Vibe Coding Index against 37.4 for Grok 4.3. Pick Grok 4.3 for output tokens 2.4x cheaper ($2.50 vs $6.00 per million) and a lower cost per solved task ($0.31 against $0.82).

Which is cheaper, Grok 4.3 or Grok 4.6?

Grok 4.3 costs $1.25 per million input tokens and $2.50 per million output tokens; Grok 4.6 costs $2.00 and $6.00. Per solved SWE-bench Verified task, Grok 4.3 costs $0.31 and Grok 4.6 $0.82.

Which has the bigger context window, Grok 4.3 or Grok 4.6?

Grok 4.3, with 1M tokens against 500K.

How many benchmarks is the Grok 4.3 vs Grok 4.6 comparison based on?

96 benchmarks have a result for both models as of October 22, 2026. Grok 4.3's coding index rests on 3 independent benchmarks and Grok 4.6's on 6. 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-4-3-vs-grok-4-6">LLMBenchmark.ai, Grok 4.3 vs Grok 4.6</a></p>