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Claude Sonnet 4.6 vs Muse Spark 1.2

Updated October 21, 2026. 86 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 Muse Spark 1.2
Claude Sonnet 4.6Anthropic
Coding
57.8
Overall
30.1
Output $/M
$15.00
17
Muse Spark 1.2Meta
Coding
65.1
Overall
39.6
Output $/M
$4.25
68
vs boards won of 86 shared, 1 tied

Decision reading

Pick Muse Spark 1.2 for coding: it scores 65.1 on the Vibe Coding Index against 57.8 for Claude Sonnet 4.6.

Pick Claude Sonnet 4.6 when what matters is Code migration (Vals AI) or WeirdML, where it leads.

Model AClaude Sonnet 4.6Anthropic57.8/1002 independent benchmarks$1.68 per solved taskModel BMuse Spark 1.2Meta65.1/1002 independent benchmarks$0.64 per solved task
Shared results
86
Claude Sonnet 4.6 only
31
Muse Spark 1.2 only
11
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, Muse Spark 1.2 65.1 from 2 benchmarks.
Widest category
Coding, 6.8 points apart on average over 15 shared benchmarks.
Widest single gap
LiveBench browser: Claude Sonnet 4.6 68.0% against Muse Spark 1.2 36.0%, 32.0 points apart on a 0 to 100 scale.
Output price
Claude Sonnet 4.6 $15.00 against Muse Spark 1.2 $4.25 per million output tokens, 3.5x apart.
Context window
Claude Sonnet 4.6 takes 1M tokens, Muse Spark 1.2 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
CategoryClaude Sonnet 4.6BarsMuse Spark 1.2Ties
Coding2121 tie
Intelligence02
Agentic work59
Reasoning27
Math21
Knowledge19
Web design18
General420
All shared boards17681 tie
CodingLike-for-likeFour of these boards feed the Vibe Coding Index212
Coding benchmarks for Claude Sonnet 4.6 and Muse Spark 1.2
BenchmarkClaude Sonnet 4.6Muse Spark 1.2Leader
LiveBench coding66.6%78.2%Muse Spark 1.2
LMArena WebDev15231534Muse Spark 1.2
AA Coding Index63.072.2Muse Spark 1.2
LiveCodeBench (Vals AI)82.1%Not measuredOnly Claude Sonnet 4.6 measured
SWE-bench Verified (Vals AI)77.4%86.6%Muse Spark 1.2
Terminal-Bench 4 (Vals AI)Not measured6.1%Only Muse Spark 1.2 measured
Vibe Code Bench (Vals AI)55.8%79.1%Muse Spark 1.2
Code migration (Vals AI)39.9%29.9%Claude Sonnet 4.6
ProgramBench (Vals AI)0.5%0.5%Tie
IOI (Vals AI)Not measured21.8%Only Muse Spark 1.2 measured
Terminal-Bench 2.1 (Vals AI)57.3%69.7%Muse Spark 1.2
SkillsBench (Vals AI)49.0%53.0%Muse Spark 1.2
CyberBench (Vals AI)Not measured69.5%Only Muse Spark 1.2 measured
SciCode50.1%57.4%Muse Spark 1.2
Terminal-Bench Hard (Artificial Analysis run)53.0%Not measuredOnly Claude Sonnet 4.6 measured
Terminal-Bench53.4%Not measuredOnly Claude Sonnet 4.6 measured
FrontierCode24.3%Not measuredOnly Claude Sonnet 4.6 measured
FrontierSWENot measured12.0%Only Muse Spark 1.2 measured
WeirdML66.1%60.3%Claude Sonnet 4.6
LMArena Text: coding15031505Muse Spark 1.2
LMArena Text: software and IT14911505Muse Spark 1.2
LMArena WebDev: React15121526Muse Spark 1.2
LMArena WebDev: HTML15271543Muse Spark 1.2
LMArena WebDev: from an image1529Not measuredOnly Claude Sonnet 4.6 measured
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 Claude Sonnet 4.6 and Muse Spark 1.2
BenchmarkClaude Sonnet 4.6Muse Spark 1.2Leader
AA Intelligence Index30.139.6Muse Spark 1.2
Epoch Capabilities Index152.8155.1Muse Spark 1.2
Agentic workLike-for-likePublic boards, shown as published, kept out of the index59
Agentic work benchmarks for Claude Sonnet 4.6 and Muse Spark 1.2
BenchmarkClaude Sonnet 4.6Muse Spark 1.2Leader
AA Agentic Index31.843.2Muse Spark 1.2
Design Arena: agents building web apps11901222Muse Spark 1.2
Design Arena: agents building full-stack apps12131210Claude Sonnet 4.6
Design Arena: agents building mobile apps12121182Claude Sonnet 4.6
Design Arena: agents building Android apps12021228Muse Spark 1.2
Design Arena: agents building Godot games1226Not measuredOnly Claude Sonnet 4.6 measured
Design Arena: agents building games11771179Muse Spark 1.2
Design Arena: HTML slidesNot measured1135Only Muse Spark 1.2 measured
Design Arena: PowerPoint slidesNot measured1198Only Muse Spark 1.2 measured
LiveBench research63.6%67.7%Muse Spark 1.2
LiveBench browser68.0%36.0%Claude Sonnet 4.6
LiveBench long agentic23.1%21.3%Claude Sonnet 4.6
SREBench (Vals AI)Not measured0.0%Only Muse Spark 1.2 measured
Finance Agent (Vals AI)51.0%60.6%Muse Spark 1.2
Tax Agent Bench (Vals AI)25.8%32.8%Muse Spark 1.2
Legal Research Bench (Vals AI)38.5%43.8%Muse Spark 1.2
Excel Modeling Benchmark (Vals AI)60.2%57.0%Claude Sonnet 4.6
BioMysteryBench (Vals AI)Not measured64.8%Only Muse Spark 1.2 measured
τ²-Bench Telecom79.5%Not measuredOnly Claude Sonnet 4.6 measured
APEX-Agents43.0%45.4%Muse Spark 1.2
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$7,204Not measuredOnly Claude Sonnet 4.6 measured
Neither model has a result on the other 15 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index27
Reasoning benchmarks for Claude Sonnet 4.6 and Muse Spark 1.2
BenchmarkClaude Sonnet 4.6Muse Spark 1.2Leader
GPQA Diamond85.6%Not measuredOnly Claude Sonnet 4.6 measured
LiveBench reasoning86.4%90.0%Muse Spark 1.2
MMMU Pro (Vals AI)83.6%86.1%Muse Spark 1.2
GPQA Diamond (Artificial Analysis run)87.5%90.4%Muse Spark 1.2
Humanity's Last Exam (Artificial Analysis run)33.6%45.5%Muse Spark 1.2
GPQA Diamond (Epoch AI run)87.4%Not measuredOnly Claude Sonnet 4.6 measured
ARC-AGI86.5%Not measuredOnly Claude Sonnet 4.6 measured
ARC-AGI-260.4%Not measuredOnly Claude Sonnet 4.6 measured
SimpleBenchNot measured74.5%Only Muse Spark 1.2 measured
Chess puzzles23.0%27.0%Muse Spark 1.2
Mystery game puzzles16.0%Not measuredOnly Claude Sonnet 4.6 measured
LMArena Text: hard prompts14851489Muse Spark 1.2
LMArena Text: expert15001475Claude Sonnet 4.6
LMArena Text: hard prompts in English14931487Claude Sonnet 4.6
LMArena Vision: diagrams13061317Muse Spark 1.2
LMArena Vision: homework1311Not measuredOnly Claude Sonnet 4.6 measured
Neither model has a result on the other 5 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index21
Math benchmarks for Claude Sonnet 4.6 and Muse Spark 1.2
BenchmarkClaude Sonnet 4.6Muse Spark 1.2Leader
AIME92.3%Not measuredOnly Claude Sonnet 4.6 measured
OTIS Mock AIME85.8%Not measuredOnly Claude Sonnet 4.6 measured
ProofBench45.0%43.0%Claude Sonnet 4.6
LMArena Text: math14621484Muse Spark 1.2
LMArena Text: mathematical work14831480Claude Sonnet 4.6
Neither model has a result on the other 8 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index19
Knowledge benchmarks for Claude Sonnet 4.6 and Muse Spark 1.2
BenchmarkClaude Sonnet 4.6Muse Spark 1.2Leader
MMLU Pro87.3%88.3%Muse Spark 1.2
LegalBench (Vals AI)82.1%85.3%Muse Spark 1.2
CaseLaw (Vals AI)64.0%Not measuredOnly Claude Sonnet 4.6 measured
CorpFin (Vals AI)65.3%70.9%Muse Spark 1.2
TaxEval (Vals AI)77.1%80.4%Muse Spark 1.2
MortgageTax (Vals AI)67.7%65.4%Claude Sonnet 4.6
MedQA (Vals AI)92.1%Not measuredOnly Claude Sonnet 4.6 measured
MedCode (Vals AI)Not measured49.4%Only Muse Spark 1.2 measured
SimpleQA Verified35.5%60.3%Muse Spark 1.2
LMArena Text: science14741500Muse Spark 1.2
LMArena Text: medicine and healthcare14511496Muse Spark 1.2
LMArena Text: legal and government14701517Muse Spark 1.2
LMArena Text: business and finance14641484Muse Spark 1.2
Neither model has a result on the other 4 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index18
Web design benchmarks for Claude Sonnet 4.6 and Muse Spark 1.2
BenchmarkClaude Sonnet 4.6Muse Spark 1.2Leader
Design Arena: websites12851313Muse Spark 1.2
Design Arena: UI components12711300Muse Spark 1.2
Design Arena: game dev12591302Muse Spark 1.2
Design Arena: data viz12781334Muse Spark 1.2
Design Arena: 3D12341301Muse Spark 1.2
Design Arena: all code categories12761313Muse Spark 1.2
Design Arena: SVG11961285Muse Spark 1.2
Design Arena: ASCII art12351284Muse Spark 1.2
LiveBench design71.8%67.1%Claude Sonnet 4.6
GeneralLike-for-likePublic boards, shown as published, kept out of the index420
General benchmarks for Claude Sonnet 4.6 and Muse Spark 1.2
BenchmarkClaude Sonnet 4.6Muse Spark 1.2Leader
LiveBench data analysis76.1%76.5%Muse Spark 1.2
Public Benefits Bench (Vals AI)62.5%68.5%Muse Spark 1.2
SAGE (Vals AI)46.6%47.7%Muse Spark 1.2
MedScribe (Vals AI)Not measured90.1%Only Muse Spark 1.2 measured
Vals Multimodal Index60.6%69.8%Muse Spark 1.2
IFBench56.6%Not measuredOnly Claude Sonnet 4.6 measured
Long context reasoning (AA-LCR)80.0%79.0%Claude Sonnet 4.6
DTBench89.9%94.7%Muse Spark 1.2
LMCA46.5%48.4%Muse Spark 1.2
ExploitBench23.6%Not measuredOnly Claude Sonnet 4.6 measured
LMArena Text14581482Muse Spark 1.2
LMArena Text: instruction following14761462Claude Sonnet 4.6
LMArena Text: creative writing14351436Muse Spark 1.2
LMArena Vision12831304Muse Spark 1.2
LMArena Text: English14721483Muse Spark 1.2
LMArena Text: non-English14401476Muse Spark 1.2
LMArena Text: Chinese14911509Muse Spark 1.2
LMArena Text: German1428Not measuredOnly Claude Sonnet 4.6 measured
LMArena Text: Japanese1420Not measuredOnly Claude Sonnet 4.6 measured
LMArena Text: Korean14101462Muse Spark 1.2
LMArena Text: French14651495Muse Spark 1.2
LMArena Text: Spanish14641484Muse Spark 1.2
LMArena Text: Russian14401483Muse Spark 1.2
LMArena Text: Polish1443Not measuredOnly Claude Sonnet 4.6 measured
LMArena Text: multi-turn14641502Muse Spark 1.2
LMArena Text: longer queries14791473Claude Sonnet 4.6
LMArena Text: writing and language14441453Muse Spark 1.2
LMArena Text: entertainment and media14311443Muse Spark 1.2
LMArena Vision: English12981291Claude Sonnet 4.6
LMArena Vision: Chinese1307Not measuredOnly Claude Sonnet 4.6 measured
LMArena Vision: reading text12961313Muse Spark 1.2
LMArena Vision: humor1248Not measuredOnly Claude Sonnet 4.6 measured
LMArena Vision: recognizing things1195Not measuredOnly Claude Sonnet 4.6 measured
LMArena Vision: creative writing1272Not measuredOnly Claude Sonnet 4.6 measured
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 Muse Spark 1.2
BenchmarkClaude Sonnet 4.6Muse Spark 1.2Leader
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
Muse Spark 1.2$0.0034Fits in one request

Muse Spark 1.2 costs less

Repository review

50K input + 3K output tokens

Claude Sonnet 4.6$0.195Fits in one request
Muse Spark 1.2$0.075Fits in one request

Muse Spark 1.2 costs less

Agent loop

200K input + 10K output tokens

Claude Sonnet 4.6$0.750Fits in one request
Muse Spark 1.2$0.292Fits in one request

Muse Spark 1.2 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 Muse Spark 1.2
SpecificationAnthropic Claude Sonnet 4.6Meta Muse Spark 1.2
MakerAnthropicMeta
WeightsNo public weights listedNo public weights listed
ReleasedFebruary 17, 2026August 5, 2026
Context window1M1.05M
Input $/Mtok$3.00$1.25
Output $/Mtok$15.00$4.25
Coding index57.865.1
Independent measurements behind it22
Cost per solved task$1.68$0.64
SourceOpenRouter listingOpenRouter listing

Questions

Is Claude Sonnet 4.6 better than Muse Spark 1.2 for coding?

Pick Muse Spark 1.2 for coding: it scores 65.1 on the Vibe Coding Index against 57.8 for Claude Sonnet 4.6. Pick Claude Sonnet 4.6 when what matters is Code migration (Vals AI) or WeirdML, where it leads.

Which is cheaper, Claude Sonnet 4.6 or Muse Spark 1.2?

Claude Sonnet 4.6 costs $3.00 per million input tokens and $15.00 per million output tokens; Muse Spark 1.2 costs $1.25 and $4.25. Per solved SWE-bench Verified task, Claude Sonnet 4.6 costs $1.68 and Muse Spark 1.2 $0.64.

Which has the bigger context window, Claude Sonnet 4.6 or Muse Spark 1.2?

Muse Spark 1.2, with 1.05M tokens against 1M.

How many benchmarks is the Claude Sonnet 4.6 vs Muse Spark 1.2 comparison based on?

86 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 Muse Spark 1.2'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/claude-sonnet-4-6-vs-meta-muse-spark-1-2">LLMBenchmark.ai, Claude Sonnet 4.6 vs Muse Spark 1.2</a></p>