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Claude Opus 4.6 vs Grok 4.6

Updated October 21, 2026. 90 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.

Replace Claude Opus 4.6 Replace Grok 4.6
Claude Opus 4.6Anthropic
Coding
66.9
Overall
31.9
Output $/M
$25.00
49
Grok 4.6xAI
Coding
76.4
Overall
44.3
Output $/M
$6.00
40
vs boards won of 90 shared, 1 tied

Decision reading

Pick Grok 4.6 for coding: it scores 76.4 on the Vibe Coding Index against 66.9 for Claude Opus 4.6.

Pick Claude Opus 4.6 when the context window is larger, 1M against 500K tokens, or when what matters is WeirdML or LMArena Text: coding, where it leads.

Model AClaude Opus 4.6Anthropic66.9/1002 independent benchmarks$1.56 per solved taskModel BGrok 4.6xAI76.4/1002 independent benchmarks$0.82 per solved task
Shared results
90
Claude Opus 4.6 only
18
Grok 4.6 only
33
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 Opus 4.6 66.9 from 2 benchmarks, Grok 4.6 76.4 from 2 benchmarks.
Widest category
Coding, 11.9 points apart on average over 11 shared benchmarks.
Widest single gap
SAGE (Vals AI): Claude Opus 4.6 51.6% against Grok 4.6 28.9%, 22.7 points apart on a 0 to 100 scale.
Output price
Claude Opus 4.6 $25.00 against Grok 4.6 $6.00 per million output tokens, 4.2x apart.
Context window
Claude Opus 4.6 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
CategoryClaude Opus 4.6BarsGrok 4.6Ties
Coding38
Intelligence02
Agentic work16
Reasoning78
Math231 tie
Knowledge83
Web design17
General273
All shared boards49401 tie
CodingLike-for-likeFour of these boards feed the Vibe Coding Index38
Coding benchmarks for Claude Opus 4.6 and Grok 4.6
BenchmarkClaude Opus 4.6Grok 4.6Leader
SWE-bench Verified75.6%Not measuredOnly Claude Opus 4.6 measured
SWE-bench Multilingual72.0%Not measuredOnly Claude Opus 4.6 measured
LiveBench codingNot measured89.1%Only Grok 4.6 measured
LMArena WebDev15471617Grok 4.6
AA Coding IndexNot measured76.8Only Grok 4.6 measured
LiveCodeBench (Vals AI)84.7%88.2%Grok 4.6
SWE-bench Verified (Vals AI)78.2%95.6%Grok 4.6
Terminal-Bench 4 (Vals AI)Not measured17.2%Only Grok 4.6 measured
Vibe Code Bench (Vals AI)57.6%76.2%Grok 4.6
Code migration (Vals AI)Not measured44.6%Only Grok 4.6 measured
ProgramBench (Vals AI)Not measured1.0%Only Grok 4.6 measured
IOI (Vals AI)Not measured47.6%Only Grok 4.6 measured
Terminal-Bench 2.1 (Vals AI)Not measured78.3%Only Grok 4.6 measured
Vibe Code Bench 1-100 (Vals AI)Not measured14.8%Only Grok 4.6 measured
SkillsBench (Vals AI)Not measured55.8%Only Grok 4.6 measured
CyberBench (Vals AI)Not measured67.7%Only Grok 4.6 measured
SciCodeNot measured56.5%Only Grok 4.6 measured
Terminal-Bench Hard (Artificial Analysis run)48.5%Not measuredOnly Claude Opus 4.6 measured
Terminal-Bench79.8%Not measuredOnly Claude Opus 4.6 measured
FrontierCode26.6%48.0%Grok 4.6
FrontierSWENot measured25.3%Only Grok 4.6 measured
GSO-Bench41.2%Not measuredOnly Claude Opus 4.6 measured
WeirdML78.0%67.3%Claude Opus 4.6
Cybench93.0%Not measuredOnly Claude Opus 4.6 measured
ALE-BenchNot measured1508.1Only Grok 4.6 measured
LMArena Text: coding15341466Claude Opus 4.6
LMArena Text: software and IT15271457Claude Opus 4.6
LMArena WebDev: React15391631Grok 4.6
LMArena WebDev: HTML15591597Grok 4.6
LMArena WebDev: from an image15431603Grok 4.6
Neither model has a result on the other 8 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index02
Intelligence benchmarks for Claude Opus 4.6 and Grok 4.6
BenchmarkClaude Opus 4.6Grok 4.6Leader
AA Intelligence Index31.944.3Grok 4.6
Epoch Capabilities Index155.7156.6Grok 4.6
Agentic workLike-for-likePublic boards, shown as published, kept out of the index16
Agentic work benchmarks for Claude Opus 4.6 and Grok 4.6
BenchmarkClaude Opus 4.6Grok 4.6Leader
AA Agentic IndexNot measured53.0Only Grok 4.6 measured
Design Arena: agents building web apps12061247Grok 4.6
Design Arena: agents building full-stack apps12201264Grok 4.6
Design Arena: agents building mobile apps12071234Grok 4.6
Design Arena: agents building Android apps12041297Grok 4.6
Design Arena: agents building Godot gamesNot measured1276Only Grok 4.6 measured
Design Arena: agents building games12141208Claude Opus 4.6
Design Arena: HTML slidesNot measured1249Only Grok 4.6 measured
Design Arena: PowerPoint slidesNot measured1241Only Grok 4.6 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)Not measured53.7%Only Grok 4.6 measured
Tax Agent Bench (Vals AI)Not measured33.1%Only Grok 4.6 measured
Legal Research Bench (Vals AI)Not measured48.1%Only Grok 4.6 measured
Excel Modeling Benchmark (Vals AI)Not measured62.7%Only Grok 4.6 measured
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 Telecom92.1%Not measuredOnly Claude Opus 4.6 measured
APEX-Agents46.3%65.3%Grok 4.6
METR time horizons78.9%Not measuredOnly Claude Opus 4.6 measured
Remote Labor Index4.2%Not measuredOnly Claude Opus 4.6 measured
DeepResearch Bench55.3%Not measuredOnly Claude Opus 4.6 measured
Vending-Bench 2$8,018$9,047Grok 4.6
Neither model has a result on the other 13 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index78
Reasoning benchmarks for Claude Opus 4.6 and Grok 4.6
BenchmarkClaude Opus 4.6Grok 4.6Leader
GPQA Diamond89.7%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)83.9%Not measuredOnly Claude Opus 4.6 measured
GPQA Diamond (Artificial Analysis run)89.6%94.9%Grok 4.6
Humanity's Last Exam (Artificial Analysis run)39.9%44.1%Grok 4.6
GPQA Diamond (Epoch AI run)90.5%94.0%Grok 4.6
ARC-AGI94.0%87.5%Claude Opus 4.6
ARC-AGI-269.2%67.1%Claude Opus 4.6
SimpleBench67.6%75.9%Grok 4.6
Chess puzzles21.0%33.0%Grok 4.6
Mystery game puzzles25.0%34.0%Grok 4.6
EBR-bench12.7%30.5%Grok 4.6
LMArena Text: hard prompts15251448Claude Opus 4.6
LMArena Text: expert15441469Claude Opus 4.6
LMArena Text: hard prompts in English15301445Claude Opus 4.6
LMArena Vision: diagrams13401285Claude Opus 4.6
LMArena Vision: homework13371283Claude Opus 4.6
Neither model has a result on the other 3 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index23
Math benchmarks for Claude Opus 4.6 and Grok 4.6
BenchmarkClaude Opus 4.6Grok 4.6Leader
AIME95.6%Not measuredOnly Claude Opus 4.6 measured
OTIS Mock AIME94.4%99.2%Grok 4.6
FrontierMath, tiers 1 to 366.0%66.0%Tie
FrontierMath, tier 426.8%31.7%Grok 4.6
ProofBench50.0%51.0%Grok 4.6
LMArena Text: math15181417Claude Opus 4.6
LMArena Text: mathematical work15251464Claude Opus 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 Opus 4.6 and Grok 4.6
BenchmarkClaude Opus 4.6Grok 4.6Leader
MMLU Pro89.1%89.4%Grok 4.6
LegalBench (Vals AI)85.3%86.3%Grok 4.6
CaseLaw (Vals AI)62.1%Not measuredOnly Claude Opus 4.6 measured
CorpFin (Vals AI)67.0%66.2%Claude Opus 4.6
TaxEval (Vals AI)76.0%71.1%Claude Opus 4.6
MortgageTax (Vals AI)68.5%64.2%Claude Opus 4.6
MedQA (Vals AI)95.4%Not measuredOnly Claude Opus 4.6 measured
MedCode (Vals AI)49.1%44.7%Claude Opus 4.6
SimpleQA Verified47.0%49.3%Grok 4.6
LMArena Text: science15191437Claude Opus 4.6
LMArena Text: medicine and healthcare15041420Claude Opus 4.6
LMArena Text: legal and government15121429Claude Opus 4.6
LMArena Text: business and finance14971416Claude Opus 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 index17
Web design benchmarks for Claude Opus 4.6 and Grok 4.6
BenchmarkClaude Opus 4.6Grok 4.6Leader
Design Arena: websites12911289Claude Opus 4.6
Design Arena: UI components12841294Grok 4.6
Design Arena: game dev12781296Grok 4.6
Design Arena: data viz12791283Grok 4.6
Design Arena: 3D12741277Grok 4.6
Design Arena: all code categories12891292Grok 4.6
Design Arena: SVG12271239Grok 4.6
Design Arena: ASCII art12541278Grok 4.6
LiveBench designNot measured79.8%Only Grok 4.6 measured
GeneralLike-for-likePublic boards, shown as published, kept out of the index273
General benchmarks for Claude Opus 4.6 and Grok 4.6
BenchmarkClaude Opus 4.6Grok 4.6Leader
LiveBench data analysisNot measured75.3%Only Grok 4.6 measured
Public Benefits Bench (Vals AI)Not measured66.8%Only Grok 4.6 measured
SAGE (Vals AI)51.6%28.9%Claude Opus 4.6
MedScribe (Vals AI)86.7%86.5%Claude Opus 4.6
IFBench53.1%Not measuredOnly Claude Opus 4.6 measured
Long context reasoning (AA-LCR)78.0%81.0%Grok 4.6
DTBench91.2%97.3%Grok 4.6
LMCA55.8%48.5%Claude Opus 4.6
CL-bench20.7%Not measuredOnly Claude Opus 4.6 measured
Furniture assembly28.3%40.0%Grok 4.6
CL-bench Life17.0%Not measuredOnly Claude Opus 4.6 measured
LMArena Text15011429Claude Opus 4.6
LMArena Text: instruction following15211431Claude Opus 4.6
LMArena Text: creative writing15051426Claude Opus 4.6
LMArena Vision13161263Claude Opus 4.6
LMArena Text: English15111433Claude Opus 4.6
LMArena Text: non-English14881420Claude Opus 4.6
LMArena Text: Chinese15511476Claude Opus 4.6
LMArena Text: German15001426Claude Opus 4.6
LMArena Text: Japanese14881378Claude Opus 4.6
LMArena Text: Korean14641391Claude Opus 4.6
LMArena Text: French15121455Claude Opus 4.6
LMArena Text: Spanish15101414Claude Opus 4.6
LMArena Text: Russian14971421Claude Opus 4.6
LMArena Text: Polish14991430Claude Opus 4.6
LMArena Text: multi-turn15111425Claude Opus 4.6
LMArena Text: longer queries15181456Claude Opus 4.6
LMArena Text: writing and language15021429Claude Opus 4.6
LMArena Text: entertainment and media14921421Claude Opus 4.6
LMArena Vision: English13241270Claude Opus 4.6
LMArena Vision: Chinese13701289Claude Opus 4.6
LMArena Vision: reading text13261272Claude Opus 4.6
LMArena Vision: humor13141270Claude Opus 4.6
LMArena Vision: recognizing things1274Not measuredOnly Claude Opus 4.6 measured
LMArena Vision: creative writing13311262Claude Opus 4.6
LMArena Document15071452Claude Opus 4.6
Neither model has a result on the other 10 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for Claude Opus 4.6 and Grok 4.6
BenchmarkClaude Opus 4.6Grok 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

Claude Opus 4.6$0.018Fits in one request
Grok 4.6$0.0050Fits in one request

Grok 4.6 costs less

Repository review

50K input + 3K output tokens

Claude Opus 4.6$0.325Fits in one request
Grok 4.6$0.118Fits in one request

Grok 4.6 costs less

Agent loop

200K input + 10K output tokens

Claude Opus 4.6$1.25Fits in one request
Grok 4.6$0.460Fits in one request

Grok 4.6 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 Opus 4.6 and Grok 4.6
SpecificationAnthropic Claude Opus 4.6SpaceXAI Grok 4.6
MakerAnthropicxAI
WeightsNo public weights listedNo public weights listed
ReleasedFebruary 4, 2026August 12, 2026
Context window1M500K
Input $/Mtok$5.00$2.00
Output $/Mtok$25.00$6.00
Coding index66.976.4
Independent measurements behind it22
Cost per solved task$1.56$0.82
SourceOpenRouter listingOpenRouter listing

Questions

Is Claude Opus 4.6 better than Grok 4.6 for coding?

Pick Grok 4.6 for coding: it scores 76.4 on the Vibe Coding Index against 66.9 for Claude Opus 4.6. Pick Claude Opus 4.6 when the context window is larger, 1M against 500K tokens, or when what matters is WeirdML or LMArena Text: coding, where it leads.

Which is cheaper, Claude Opus 4.6 or Grok 4.6?

Claude Opus 4.6 costs $5.00 per million input tokens and $25.00 per million output tokens; Grok 4.6 costs $2.00 and $6.00. Per solved SWE-bench Verified task, Claude Opus 4.6 costs $1.56 and Grok 4.6 $0.82.

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

Claude Opus 4.6, with 1M tokens against 500K.

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

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

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