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Grok 4.6 vs Muse Spark 1.3

Updated October 21, 2026. 91 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.

Replace Grok 4.6 Replace Muse Spark 1.3
Grok 4.6xAI
Coding
76.4
Overall
44.3
Output $/M
$6.00
19
Muse Spark 1.3Meta
Coding
79.7
Overall
48.1
Output $/M
$4.25
71
vs boards won of 91 shared, 1 tied

Decision reading

Pick Muse Spark 1.3 for coding: it scores 79.7 on the Vibe Coding Index against 76.4 for Grok 4.6.

Pick Grok 4.6 when what matters is AA Coding Index or Terminal-Bench 4 (Vals AI), where it leads.

Model AGrok 4.6xAI76.4/1002 independent benchmarks$0.82 per solved taskModel BMuse Spark 1.3Meta79.7/1002 independent benchmarksNo cost per solved task
Shared results
91
Grok 4.6 only
32
Muse Spark 1.3 only
1
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
Grok 4.6 76.4 from 2 benchmarks, Muse Spark 1.3 79.7 from 2 benchmarks.
Widest category
Knowledge, 12.0 points apart on average over 4 shared benchmarks.
Widest single gap
Code migration (Vals AI): Grok 4.6 44.6% against Muse Spark 1.3 27.6%, 17.0 points apart on a 0 to 100 scale.
Output price
Grok 4.6 $6.00 against Muse Spark 1.3 $4.25 per million output tokens, 1.4x apart.
Context window
Grok 4.6 takes 500K tokens, Muse Spark 1.3 1.05M.

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 4.6BarsMuse Spark 1.3Ties
Coding612
Intelligence02
Agentic work87
Reasoning37
Math051 tie
Knowledge04
Web design18
General126
All shared boards19711 tie
CodingLike-for-likeFour of these boards feed the Vibe Coding Index612
Coding benchmarks for Grok 4.6 and Muse Spark 1.3
BenchmarkGrok 4.6Muse Spark 1.3Leader
LiveBench coding89.1%90.2%Muse Spark 1.3
LMArena WebDev16171659Muse Spark 1.3
AA Coding Index76.875.8Grok 4.6
LiveCodeBench (Vals AI)88.2%Not measuredOnly Grok 4.6 measured
SWE-bench Verified (Vals AI)95.6%Not measuredOnly Grok 4.6 measured
Terminal-Bench 4 (Vals AI)17.2%10.6%Grok 4.6
Vibe Code Bench (Vals AI)76.2%82.9%Muse Spark 1.3
Code migration (Vals AI)44.6%27.6%Grok 4.6
ProgramBench (Vals AI)1.0%0.5%Grok 4.6
IOI (Vals AI)47.6%43.9%Grok 4.6
Terminal-Bench 2.1 (Vals AI)78.3%72.3%Grok 4.6
Vibe Code Bench 1-100 (Vals AI)14.8%Not measuredOnly Grok 4.6 measured
SkillsBench (Vals AI)55.8%Not measuredOnly Grok 4.6 measured
CyberBench (Vals AI)67.7%69.4%Muse Spark 1.3
SciCode56.5%59.7%Muse Spark 1.3
FrontierCode48.0%Not measuredOnly Grok 4.6 measured
FrontierSWE25.3%25.8%Muse Spark 1.3
WeirdML67.3%Not measuredOnly Grok 4.6 measured
ALE-Bench1508.11688.3Muse Spark 1.3
LMArena Text: coding14661510Muse Spark 1.3
LMArena Text: software and IT14571511Muse Spark 1.3
LMArena WebDev: React16311672Muse Spark 1.3
LMArena WebDev: HTML15971653Muse Spark 1.3
LMArena WebDev: from an image16031640Muse Spark 1.3
Neither model has a result on the other 14 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index02
Intelligence benchmarks for Grok 4.6 and Muse Spark 1.3
BenchmarkGrok 4.6Muse Spark 1.3Leader
AA Intelligence Index44.348.1Muse Spark 1.3
Epoch Capabilities Index156.6157.2Muse Spark 1.3
Agentic workLike-for-likePublic boards, shown as published, kept out of the index87
Agentic work benchmarks for Grok 4.6 and Muse Spark 1.3
BenchmarkGrok 4.6Muse Spark 1.3Leader
AA Agentic Index53.055.5Muse Spark 1.3
Design Arena: agents building web apps12471297Muse Spark 1.3
Design Arena: agents building full-stack apps12641295Muse Spark 1.3
Design Arena: agents building mobile apps12341217Grok 4.6
Design Arena: agents building Android apps1297Not measuredOnly Grok 4.6 measured
Design Arena: agents building Godot games12761241Grok 4.6
Design Arena: agents building games1208Not measuredOnly Grok 4.6 measured
Design Arena: HTML slides1249Not measuredOnly Grok 4.6 measured
Design Arena: PowerPoint slides12411244Muse Spark 1.3
Design Arena: spreadsheetsNot measured1048Only Muse Spark 1.3 measured
LiveBench research84.5%68.6%Grok 4.6
LiveBench browser64.0%80.0%Muse Spark 1.3
LiveBench long agentic40.7%40.4%Grok 4.6
Finance Agent (Vals AI)53.7%58.9%Muse Spark 1.3
Tax Agent Bench (Vals AI)33.1%36.0%Muse Spark 1.3
Legal Research Bench (Vals AI)48.1%40.9%Grok 4.6
Excel Modeling Benchmark (Vals AI)62.7%62.7%Grok 4.6
BioMysteryBench (Vals AI)72.2%Not measuredOnly Grok 4.6 measured
Terminal-Bench-Science (Vals AI)11.4%4.3%Grok 4.6
Vals Science Index38.1%Not measuredOnly Grok 4.6 measured
Time Horizon Index (Vals AI)5.8%Not measuredOnly Grok 4.6 measured
APEX-Agents65.3%58.6%Grok 4.6
Vending-Bench 2$9,047Not measuredOnly Grok 4.6 measured
Neither model has a result on the other 16 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index37
Reasoning benchmarks for Grok 4.6 and Muse Spark 1.3
BenchmarkGrok 4.6Muse Spark 1.3Leader
GPQA Diamond94.7%Not measuredOnly Grok 4.6 measured
LiveBench reasoning91.2%89.7%Grok 4.6
MysteryMechanism (Vals AI)30.6%Not measuredOnly Grok 4.6 measured
GPQA Diamond (Artificial Analysis run)94.9%94.1%Grok 4.6
Humanity's Last Exam (Artificial Analysis run)44.1%48.7%Muse Spark 1.3
GPQA Diamond (Epoch AI run)94.0%Not measuredOnly Grok 4.6 measured
ARC-AGI87.5%Not measuredOnly Grok 4.6 measured
ARC-AGI-267.1%Not measuredOnly Grok 4.6 measured
SimpleBench75.9%Not measuredOnly Grok 4.6 measured
Chess puzzles33.0%37.0%Muse Spark 1.3
Mystery game puzzles34.0%25.0%Grok 4.6
EBR-bench30.5%Not measuredOnly Grok 4.6 measured
LMArena Text: hard prompts14481503Muse Spark 1.3
LMArena Text: expert14691519Muse Spark 1.3
LMArena Text: hard prompts in English14451500Muse Spark 1.3
LMArena Vision: diagrams12851330Muse Spark 1.3
LMArena Vision: homework12831296Muse Spark 1.3
Neither model has a result on the other 4 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index05
Math benchmarks for Grok 4.6 and Muse Spark 1.3
BenchmarkGrok 4.6Muse Spark 1.3Leader
OTIS Mock AIME99.2%99.2%Tie
FrontierMath, tiers 1 to 366.0%74.4%Muse Spark 1.3
FrontierMath, tier 431.7%46.3%Muse Spark 1.3
ProofBench51.0%58.0%Muse Spark 1.3
LMArena Text: math14171497Muse Spark 1.3
LMArena Text: mathematical work14641491Muse Spark 1.3
Neither model has a result on the other 7 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index04
Knowledge benchmarks for Grok 4.6 and Muse Spark 1.3
BenchmarkGrok 4.6Muse Spark 1.3Leader
MMLU Pro89.4%Not measuredOnly Grok 4.6 measured
LegalBench (Vals AI)86.3%Not measuredOnly Grok 4.6 measured
CorpFin (Vals AI)66.2%Not measuredOnly Grok 4.6 measured
TaxEval (Vals AI)71.1%Not measuredOnly Grok 4.6 measured
MortgageTax (Vals AI)64.2%Not measuredOnly Grok 4.6 measured
MedCode (Vals AI)44.7%Not measuredOnly Grok 4.6 measured
SimpleQA Verified49.3%Not measuredOnly Grok 4.6 measured
LMArena Text: science14371507Muse Spark 1.3
LMArena Text: medicine and healthcare14201493Muse Spark 1.3
LMArena Text: legal and government14291499Muse Spark 1.3
LMArena Text: business and finance14161490Muse Spark 1.3
Neither model has a result on the other 6 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index18
Web design benchmarks for Grok 4.6 and Muse Spark 1.3
BenchmarkGrok 4.6Muse Spark 1.3Leader
Design Arena: websites12891356Muse Spark 1.3
Design Arena: UI components12941352Muse Spark 1.3
Design Arena: game dev12961329Muse Spark 1.3
Design Arena: data viz12831343Muse Spark 1.3
Design Arena: 3D12771359Muse Spark 1.3
Design Arena: all code categories12921353Muse Spark 1.3
Design Arena: SVG12391300Muse Spark 1.3
Design Arena: ASCII art12781280Muse Spark 1.3
LiveBench design79.8%74.8%Grok 4.6
GeneralLike-for-likePublic boards, shown as published, kept out of the index126
General benchmarks for Grok 4.6 and Muse Spark 1.3
BenchmarkGrok 4.6Muse Spark 1.3Leader
LiveBench data analysis75.3%79.6%Muse Spark 1.3
Public Benefits Bench (Vals AI)66.8%Not measuredOnly Grok 4.6 measured
SAGE (Vals AI)28.9%Not measuredOnly Grok 4.6 measured
MedScribe (Vals AI)86.5%Not measuredOnly Grok 4.6 measured
Long context reasoning (AA-LCR)81.0%83.0%Muse Spark 1.3
DTBench97.3%96.5%Grok 4.6
LMCA48.5%53.9%Muse Spark 1.3
Furniture assembly40.0%Not measuredOnly Grok 4.6 measured
LMArena Text14291490Muse Spark 1.3
LMArena Text: instruction following14311479Muse Spark 1.3
LMArena Text: creative writing14261462Muse Spark 1.3
LMArena Vision12631308Muse Spark 1.3
LMArena Text: English14331495Muse Spark 1.3
LMArena Text: non-English14201481Muse Spark 1.3
LMArena Text: Chinese14761532Muse Spark 1.3
LMArena Text: German14261513Muse Spark 1.3
LMArena Text: Japanese13781470Muse Spark 1.3
LMArena Text: Korean13911490Muse Spark 1.3
LMArena Text: French14551511Muse Spark 1.3
LMArena Text: Spanish14141496Muse Spark 1.3
LMArena Text: Russian14211491Muse Spark 1.3
LMArena Text: Polish14301490Muse Spark 1.3
LMArena Text: multi-turn14251487Muse Spark 1.3
LMArena Text: longer queries14561488Muse Spark 1.3
LMArena Text: writing and language14291470Muse Spark 1.3
LMArena Text: entertainment and media14211457Muse Spark 1.3
LMArena Vision: English12701298Muse Spark 1.3
LMArena Vision: Chinese12891384Muse Spark 1.3
LMArena Vision: reading text12721319Muse Spark 1.3
LMArena Vision: humor12701293Muse Spark 1.3
LMArena Vision: creative writing12621296Muse Spark 1.3
LMArena Document1452Not measuredOnly Grok 4.6 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 Grok 4.6 and Muse Spark 1.3
BenchmarkGrok 4.6Muse Spark 1.3Leader
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

Grok 4.6$0.0050Fits in one request
Muse Spark 1.3$0.0034Fits in one request

Muse Spark 1.3 costs less

Repository review

50K input + 3K output tokens

Grok 4.6$0.118Fits in one request
Muse Spark 1.3$0.075Fits in one request

Muse Spark 1.3 costs less

Agent loop

200K input + 10K output tokens

Grok 4.6$0.460Fits in one request
Muse Spark 1.3$0.292Fits in one request

Muse Spark 1.3 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 4.6 and Muse Spark 1.3
SpecificationSpaceXAI Grok 4.6Meta Muse Spark 1.3
MakerxAIMeta
WeightsNo public weights listedNo public weights listed
ReleasedAugust 12, 2026September 2, 2026
Context window500K1.05M
Input $/Mtok$2.00$1.25
Output $/Mtok$6.00$4.25
Coding index76.479.7
Independent measurements behind it22
Cost per solved task$0.82Not computable
SourceOpenRouter listingOpenRouter listing

Questions

Is Grok 4.6 better than Muse Spark 1.3 for coding?

Pick Muse Spark 1.3 for coding: it scores 79.7 on the Vibe Coding Index against 76.4 for Grok 4.6. Pick Grok 4.6 when what matters is AA Coding Index or Terminal-Bench 4 (Vals AI), where it leads.

Which is cheaper, Grok 4.6 or Muse Spark 1.3?

Grok 4.6 costs $2.00 per million input tokens and $6.00 per million output tokens; Muse Spark 1.3 costs $1.25 and $4.25. Cost per solved task is known for Grok 4.6 only.

Which has the bigger context window, Grok 4.6 or Muse Spark 1.3?

Muse Spark 1.3, with 1.05M tokens against 500K.

How many benchmarks is the Grok 4.6 vs Muse Spark 1.3 comparison based on?

91 benchmarks have a result for both models as of October 21, 2026. Grok 4.6's coding index rests on 2 independent benchmarks and Muse Spark 1.3's on 2. 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-4-6-vs-meta-muse-spark-1-3">LLMBenchmark.ai, Grok 4.6 vs Muse Spark 1.3</a></p>