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Claude Sonnet 4.6 vs Grok 4.3

Updated October 21, 2026. 96 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.

Replace Claude Sonnet 4.6 Replace Grok 4.3
Claude Sonnet 4.6Anthropic
Coding
57.8
Overall
30.1
Output $/M
$15.00
83
Grok 4.3xAI
Coding
22.5
Overall
24.9
Output $/M
$2.50
13
vs boards won of 96 shared

Decision reading

Pick Claude Sonnet 4.6 for coding: it scores 57.8 on the Vibe Coding Index against 22.5 for Grok 4.3.

Pick Grok 4.3 when output tokens cost 6.0x less, or when a solved task costs $0.31 against $1.68.

Model AClaude Sonnet 4.6Anthropic57.8/1002 independent benchmarks$1.68 per solved taskModel BGrok 4.3xAI22.5/1001 independent benchmark$0.31 per solved task
Shared results
96
Claude Sonnet 4.6 only
21
Grok 4.3 only
8
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 Sonnet 4.6 57.8 from 2 benchmarks, Grok 4.3 22.5 from 1 benchmark.
Widest category
Agentic work, 24.6 points apart on average over 13 shared benchmarks.
Widest single gap
Vending-Bench 2: Claude Sonnet 4.6 $7,204 against Grok 4.3 $35, 44.8 points apart on a 0 to 100 scale.
Output price
Claude Sonnet 4.6 $15.00 against Grok 4.3 $2.50 per million output tokens, 6.0x apart.
Context window
Both take 1M tokens.

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 Sonnet 4.6BarsGrok 4.3Ties
Coding161
Intelligence10
Agentic work121
Reasoning74
Math31
Knowledge83
Web design80
General283
All shared boards8313
CodingLike-for-likeFour of these boards feed the Vibe Coding Index161
Coding benchmarks for Claude Sonnet 4.6 and Grok 4.3
BenchmarkClaude Sonnet 4.6Grok 4.3Leader
LiveBench coding66.6%Not measuredOnly Claude Sonnet 4.6 measured
LMArena WebDev15231358Claude Sonnet 4.6
AA Coding Index63.042.2Claude Sonnet 4.6
LiveCodeBench (Vals AI)82.1%84.5%Grok 4.3
SWE-bench Verified (Vals AI)77.4%71.4%Claude Sonnet 4.6
Vibe Code Bench (Vals AI)55.8%19.4%Claude Sonnet 4.6
Code migration (Vals AI)39.9%6.8%Claude Sonnet 4.6
ProgramBench (Vals AI)0.5%0.0%Claude Sonnet 4.6
Terminal-Bench 2.1 (Vals AI)57.3%42.0%Claude Sonnet 4.6
SkillsBench (Vals AI)49.0%40.6%Claude Sonnet 4.6
SciCode50.1%48.3%Claude Sonnet 4.6
Terminal-Bench Hard (Artificial Analysis run)53.0%37.9%Claude Sonnet 4.6
Terminal-Bench53.4%Not measuredOnly Claude Sonnet 4.6 measured
FrontierCode24.3%Not measuredOnly Claude Sonnet 4.6 measured
WeirdML66.1%49.9%Claude Sonnet 4.6
ALE-BenchNot measured944.2Only Grok 4.3 measured
LMArena Text: coding15031415Claude Sonnet 4.6
LMArena Text: software and IT14911416Claude Sonnet 4.6
LMArena WebDev: React15121353Claude Sonnet 4.6
LMArena WebDev: HTML15271367Claude Sonnet 4.6
LMArena WebDev: from an image15291375Claude Sonnet 4.6
Neither model has a result on the other 17 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index10
Intelligence benchmarks for Claude Sonnet 4.6 and Grok 4.3
BenchmarkClaude Sonnet 4.6Grok 4.3Leader
AA Intelligence Index30.124.9Claude Sonnet 4.6
Epoch Capabilities Index152.8Not measuredOnly Claude Sonnet 4.6 measured
Agentic workLike-for-likePublic boards, shown as published, kept out of the index121
Agentic work benchmarks for Claude Sonnet 4.6 and Grok 4.3
BenchmarkClaude Sonnet 4.6Grok 4.3Leader
AA Agentic Index31.815.5Claude Sonnet 4.6
Design Arena: agents building web apps11901126Claude Sonnet 4.6
Design Arena: agents building full-stack apps12131006Claude Sonnet 4.6
Design Arena: agents building mobile apps12121059Claude Sonnet 4.6
Design Arena: agents building Android apps1202967Claude Sonnet 4.6
Design Arena: agents building Godot games1226914Claude Sonnet 4.6
Design Arena: agents building games11771007Claude Sonnet 4.6
Design Arena: HTML slidesNot measured1008Only Grok 4.3 measured
Design Arena: PowerPoint slidesNot measured1012Only Grok 4.3 measured
LiveBench research63.6%Not measuredOnly Claude Sonnet 4.6 measured
LiveBench browser68.0%Not measuredOnly Claude Sonnet 4.6 measured
LiveBench long agentic23.1%Not measuredOnly Claude Sonnet 4.6 measured
Finance Agent (Vals AI)51.0%37.7%Claude Sonnet 4.6
Tax Agent Bench (Vals AI)25.8%6.2%Claude Sonnet 4.6
Legal Research Bench (Vals AI)38.5%15.4%Claude Sonnet 4.6
Excel Modeling Benchmark (Vals AI)60.2%18.4%Claude Sonnet 4.6
τ²-Bench Telecom79.5%97.7%Grok 4.3
APEX-Agents43.0%Not measuredOnly Claude Sonnet 4.6 measured
OSWorld 2.09.3%Not measuredOnly Claude Sonnet 4.6 measured
DeepResearch Bench54.9%Not measuredOnly Claude Sonnet 4.6 measured
OSWorld72.1%Not measuredOnly Claude Sonnet 4.6 measured
Vending-Bench 2$7,204$35Claude Sonnet 4.6
LMArena SearchNot measured1166Only 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 index74
Reasoning benchmarks for Claude Sonnet 4.6 and Grok 4.3
BenchmarkClaude Sonnet 4.6Grok 4.3Leader
GPQA Diamond85.6%91.4%Grok 4.3
LiveBench reasoning86.4%Not measuredOnly Claude Sonnet 4.6 measured
MMMU Pro (Vals AI)83.6%83.1%Claude Sonnet 4.6
GPQA Diamond (Artificial Analysis run)87.5%90.1%Grok 4.3
Humanity's Last Exam (Artificial Analysis run)33.6%37.2%Grok 4.3
GPQA Diamond (Epoch AI run)87.4%88.8%Grok 4.3
ARC-AGI86.5%Not measuredOnly Claude Sonnet 4.6 measured
ARC-AGI-260.4%Not measuredOnly Claude Sonnet 4.6 measured
Chess puzzles23.0%18.0%Claude Sonnet 4.6
Mystery game puzzles16.0%Not measuredOnly Claude Sonnet 4.6 measured
LMArena Text: hard prompts14851396Claude Sonnet 4.6
LMArena Text: expert15001384Claude Sonnet 4.6
LMArena Text: hard prompts in English14931402Claude Sonnet 4.6
LMArena Vision: diagrams13061241Claude Sonnet 4.6
LMArena Vision: homework13111241Claude Sonnet 4.6
Neither model has a result on the other 6 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index31
Math benchmarks for Claude Sonnet 4.6 and Grok 4.3
BenchmarkClaude Sonnet 4.6Grok 4.3Leader
AIME92.3%Not measuredOnly Claude Sonnet 4.6 measured
OTIS Mock AIME85.8%93.3%Grok 4.3
FrontierMath, tiers 1 to 3Not measured42.8%Only Grok 4.3 measured
FrontierMath, tier 4Not measured14.6%Only Grok 4.3 measured
ProofBench45.0%11.0%Claude Sonnet 4.6
LMArena Text: math14621387Claude Sonnet 4.6
LMArena Text: mathematical work14831396Claude Sonnet 4.6
Neither model has a result on the other 6 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index83
Knowledge benchmarks for Claude Sonnet 4.6 and Grok 4.3
BenchmarkClaude Sonnet 4.6Grok 4.3Leader
MMLU Pro87.3%85.8%Claude Sonnet 4.6
LegalBench (Vals AI)82.1%84.5%Grok 4.3
CaseLaw (Vals AI)64.0%79.3%Grok 4.3
CorpFin (Vals AI)65.3%68.5%Grok 4.3
TaxEval (Vals AI)77.1%70.8%Claude Sonnet 4.6
MortgageTax (Vals AI)67.7%48.3%Claude Sonnet 4.6
MedQA (Vals AI)92.1%Not measuredOnly Claude Sonnet 4.6 measured
MedCode (Vals AI)Not measured38.1%Only Grok 4.3 measured
SimpleQA Verified35.5%33.2%Claude Sonnet 4.6
LMArena Text: science14741399Claude Sonnet 4.6
LMArena Text: medicine and healthcare14511384Claude Sonnet 4.6
LMArena Text: legal and government14701386Claude Sonnet 4.6
LMArena Text: business and finance14641381Claude Sonnet 4.6
Neither model has a result on the other 4 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index80
Web design benchmarks for Claude Sonnet 4.6 and Grok 4.3
BenchmarkClaude Sonnet 4.6Grok 4.3Leader
Design Arena: websites12851196Claude Sonnet 4.6
Design Arena: UI components12711192Claude Sonnet 4.6
Design Arena: game dev12591174Claude Sonnet 4.6
Design Arena: data viz12781180Claude Sonnet 4.6
Design Arena: 3D12341125Claude Sonnet 4.6
Design Arena: all code categories12761187Claude Sonnet 4.6
Design Arena: SVG11961081Claude Sonnet 4.6
Design Arena: ASCII art12351125Claude Sonnet 4.6
LiveBench design71.8%Not measuredOnly Claude Sonnet 4.6 measured
GeneralLike-for-likePublic boards, shown as published, kept out of the index283
General benchmarks for Claude Sonnet 4.6 and Grok 4.3
BenchmarkClaude Sonnet 4.6Grok 4.3Leader
LiveBench data analysis76.1%Not measuredOnly Claude Sonnet 4.6 measured
Public Benefits Bench (Vals AI)62.5%51.7%Claude Sonnet 4.6
SAGE (Vals AI)46.6%19.7%Claude Sonnet 4.6
MedScribe (Vals AI)Not measured74.4%Only Grok 4.3 measured
Vals Multimodal Index60.6%43.3%Claude Sonnet 4.6
IFBench56.6%83.3%Grok 4.3
Long context reasoning (AA-LCR)80.0%75.0%Claude Sonnet 4.6
DTBench89.9%90.7%Grok 4.3
LMCA46.5%38.3%Claude Sonnet 4.6
ExploitBench23.6%Not measuredOnly Claude Sonnet 4.6 measured
LMArena Text14581397Claude Sonnet 4.6
LMArena Text: instruction following14761366Claude Sonnet 4.6
LMArena Text: creative writing14351380Claude Sonnet 4.6
LMArena Vision12831229Claude Sonnet 4.6
LMArena Text: English14721404Claude Sonnet 4.6
LMArena Text: non-English14401385Claude Sonnet 4.6
LMArena Text: Chinese14911422Claude Sonnet 4.6
LMArena Text: German14281395Claude Sonnet 4.6
LMArena Text: Japanese14201379Claude Sonnet 4.6
LMArena Text: Korean14101354Claude Sonnet 4.6
LMArena Text: French14651411Claude Sonnet 4.6
LMArena Text: Spanish14641399Claude Sonnet 4.6
LMArena Text: Russian14401399Claude Sonnet 4.6
LMArena Text: Polish14431398Claude Sonnet 4.6
LMArena Text: multi-turn14641406Claude Sonnet 4.6
LMArena Text: longer queries14791393Claude Sonnet 4.6
LMArena Text: writing and language14441385Claude Sonnet 4.6
LMArena Text: entertainment and media14311370Claude Sonnet 4.6
LMArena Vision: English12981235Claude Sonnet 4.6
LMArena Vision: Chinese13071257Claude Sonnet 4.6
LMArena Vision: reading text12961235Claude Sonnet 4.6
LMArena Vision: humor12481222Claude Sonnet 4.6
LMArena Vision: recognizing things11951217Grok 4.3
LMArena Vision: creative writing12721237Claude Sonnet 4.6
LMArena Document1482Not measuredOnly Claude Sonnet 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 Claude Sonnet 4.6 and Grok 4.3
BenchmarkClaude Sonnet 4.6Grok 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

Claude Sonnet 4.6$0.011Fits in one request
Grok 4.3$0.0025Fits in one request

Grok 4.3 costs less

Repository review

50K input + 3K output tokens

Claude Sonnet 4.6$0.195Fits in one request
Grok 4.3$0.070Fits in one request

Grok 4.3 costs less

Agent loop

200K input + 10K output tokens

Claude Sonnet 4.6$0.750Fits in one request
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 Claude Sonnet 4.6 and Grok 4.3
SpecificationAnthropic Claude Sonnet 4.6SpaceXAI Grok 4.3
MakerAnthropicxAI
WeightsNo public weights listedNo public weights listed
ReleasedFebruary 17, 2026April 30, 2026
Context window1M1M
Input $/Mtok$3.00$1.25
Output $/Mtok$15.00$2.50
Coding index57.822.5
Independent measurements behind it21
Cost per solved task$1.68$0.31
SourceOpenRouter listingOpenRouter listing

Questions

Is Claude Sonnet 4.6 better than Grok 4.3 for coding?

Pick Claude Sonnet 4.6 for coding: it scores 57.8 on the Vibe Coding Index against 22.5 for Grok 4.3. Pick Grok 4.3 when output tokens cost 6.0x less, or when a solved task costs $0.31 against $1.68.

Which is cheaper, Claude Sonnet 4.6 or Grok 4.3?

Claude Sonnet 4.6 costs $3.00 per million input tokens and $15.00 per million output tokens; Grok 4.3 costs $1.25 and $2.50. Per solved SWE-bench Verified task, Claude Sonnet 4.6 costs $1.68 and Grok 4.3 $0.31.

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

Neither: both take 1M tokens.

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

96 benchmarks have a result for both models as of October 21, 2026. Claude Sonnet 4.6's coding index rests on 2 independent benchmarks and Grok 4.3's on 1. Where only one model has a result, the page says so instead of naming a winner.

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