Enter opens the highlighted result. Esc closes.

Claude Sonnet 5.5 vs Muse Spark 1.1

Claude Sonnet 5.5 leads Muse Spark 1.1 on coding, 87.3 to 70.3 on the Vibe Coding Index, and Muse Spark 1.1 costs 2.4x less per output token ($4.25 vs $10.00 per million). Updated October 22, 2026; 65 benchmarks have a result for both.

Replace Claude Sonnet 5.5 Replace Muse Spark 1.1
Claude Sonnet 5.5Anthropic
Coding
87.3
Overall
82.8
Output $/M
$10.00
52
Muse Spark 1.1Meta
Coding
70.3
Overall
67.0
Output $/M
$4.25
13
vs boards won of 65 shared

Claude Sonnet 5.5 or Muse Spark 1.1: which to pick

Pick Claude Sonnet 5.5 for coding: it scores 87.3 on the Vibe Coding Index against 70.3 for Muse Spark 1.1.

Pick Muse Spark 1.1 for output tokens 2.4x cheaper ($4.25 vs $10.00 per million) and a larger context window (1.05M against 1M tokens).

Model AClaude Sonnet 5.5Anthropic87.3/1005 independent benchmarksNo cost per solved taskModel BMuse Spark 1.1Meta70.3/1003 independent benchmarks$0.43 per solved task
Shared results
65
Claude Sonnet 5.5 only
31
Muse Spark 1.1 only
31
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
Claude Sonnet 5.5 87.3 from 5 benchmarks, Muse Spark 1.1 70.3 from 3 benchmarks.
Widest category
Math, 22.5 points apart on average over 3 shared benchmarks.
Widest single gap
ProofBench: Claude Sonnet 5.5 100.0% against Muse Spark 1.1 39.0%, 61.0 points apart on a 0 to 100 scale.
Output price
Claude Sonnet 5.5 $10.00 against Muse Spark 1.1 $4.25 per million output tokens, 2.4x apart.
Context window
Claude Sonnet 5.5 takes 1M tokens, Muse Spark 1.1 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 5.5BarsMuse Spark 1.1Ties
Coding110
Intelligence20
Agentic work80
Reasoning70
Math30
Knowledge14
Web design60
General149
All shared boards5213
CodingLike-for-likeSix of these boards feed the Vibe Coding Index110
Coding benchmarks for Claude Sonnet 5.5 and Muse Spark 1.1
BenchmarkClaude Sonnet 5.5Muse Spark 1.1Leader
LiveBench coding94.7%Not measuredOnly Claude Sonnet 5.5 measured
LMArena WebDev17681542Claude Sonnet 5.5
AA Coding IndexNot measured71.3Only Muse Spark 1.1 measured
LiveCodeBench (Vals AI)Not measured85.9%Only Muse Spark 1.1 measured
SWE-bench Verified (Vals AI)Not measured82.0%Only Muse Spark 1.1 measured
Terminal-Bench 4 (Vals AI)64.1%Not measuredOnly Claude Sonnet 5.5 measured
Vibe Code Bench (Vals AI)92.4%72.2%Claude Sonnet 5.5
Code migration (Vals AI)69.8%31.1%Claude Sonnet 5.5
ProgramBench (Vals AI)6.5%0.0%Claude Sonnet 5.5
IOI (Vals AI)83.1%Not measuredOnly Claude Sonnet 5.5 measured
Terminal-Bench 2.1 (Vals AI)83.2%69.3%Claude Sonnet 5.5
SWE-bench Multimodal (Vals AI)58.3%Not measuredOnly Claude Sonnet 5.5 measured
SkillsBench (Vals AI)Not measured59.2%Only Muse Spark 1.1 measured
CyberBench (Vals AI)59.6%Not measuredOnly Claude Sonnet 5.5 measured
SciCode61.0%58.8%Claude Sonnet 5.5
FrontierCode52.1%Not measuredOnly Claude Sonnet 5.5 measured
FrontierSWE61.9%Not measuredOnly Claude Sonnet 5.5 measured
ALE-Bench1819.1Not measuredOnly Claude Sonnet 5.5 measured
LMArena Text: coding15131498Claude Sonnet 5.5
LMArena Text: software and IT15041498Claude Sonnet 5.5
LMArena WebDev: React18171532Claude Sonnet 5.5
LMArena WebDev: HTML17411540Claude Sonnet 5.5
LMArena WebDev: from an image17371540Claude Sonnet 5.5
SciCode13.8%Not measuredOnly Claude Sonnet 5.5 measured
Neither model has a result on the other 15 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
Intelligence benchmarks for Claude Sonnet 5.5 and Muse Spark 1.1
BenchmarkClaude Sonnet 5.5Muse Spark 1.1Leader
AA Intelligence Index56.033.7Claude Sonnet 5.5
Epoch Capabilities Index166.2154.1Claude Sonnet 5.5
Agentic workLike-for-likePublic boards, shown as published, kept out of the index80
Agentic work benchmarks for Claude Sonnet 5.5 and Muse Spark 1.1
BenchmarkClaude Sonnet 5.5Muse Spark 1.1Leader
AA Agentic IndexNot measured25.8Only Muse Spark 1.1 measured
Design Arena: agents building web apps13051207Claude Sonnet 5.5
Design Arena: agents building full-stack appsNot measured1199Only Muse Spark 1.1 measured
Design Arena: agents building mobile apps12601175Claude Sonnet 5.5
Design Arena: agents building Android appsNot measured1178Only Muse Spark 1.1 measured
Design Arena: agents building Godot gamesNot measured1103Only Muse Spark 1.1 measured
Design Arena: agents building gamesNot measured1183Only Muse Spark 1.1 measured
Design Arena: HTML slidesNot measured1195Only Muse Spark 1.1 measured
Design Arena: PowerPoint slidesNot measured1155Only Muse Spark 1.1 measured
Design Arena: spreadsheets12601042Claude Sonnet 5.5
LiveBench research83.6%Not measuredOnly Claude Sonnet 5.5 measured
LiveBench browser84.0%Not measuredOnly Claude Sonnet 5.5 measured
LiveBench long agentic78.8%Not measuredOnly Claude Sonnet 5.5 measured
SREBench (Vals AI)30.1%Not measuredOnly Claude Sonnet 5.5 measured
Finance Agent (Vals AI)58.1%57.2%Claude Sonnet 5.5
Tax Agent Bench (Vals AI)42.0%Not measuredOnly Claude Sonnet 5.5 measured
Legal Research Bench (Vals AI)48.1%38.0%Claude Sonnet 5.5
Harvey's Legal Agent Benchmark (Vals AI)10.4%Not measuredOnly Claude Sonnet 5.5 measured
Excel Modeling Benchmark (Vals AI)75.7%56.4%Claude Sonnet 5.5
BioMysteryBench (Vals AI)81.1%Not measuredOnly Claude Sonnet 5.5 measured
Terminal-Bench-Science (Vals AI)47.1%Not measuredOnly Claude Sonnet 5.5 measured
Vals Science Index59.1%Not measuredOnly Claude Sonnet 5.5 measured
Time Horizon Index (Vals AI)Not measured1.7%Only Muse Spark 1.1 measured
APEX-Agents75.5%31.8%Claude Sonnet 5.5
SpireClimb1.3%Not measuredOnly Claude Sonnet 5.5 measured
Vending-Bench 2$11,165$6,520Claude Sonnet 5.5
Neither model has a result on the other 15 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index70
Reasoning benchmarks for Claude Sonnet 5.5 and Muse Spark 1.1
BenchmarkClaude Sonnet 5.5Muse Spark 1.1Leader
GPQA DiamondNot measured91.2%Only Muse Spark 1.1 measured
LiveBench reasoning91.6%Not measuredOnly Claude Sonnet 5.5 measured
MysteryMechanism (Vals AI)49.1%Not measuredOnly Claude Sonnet 5.5 measured
MMMU Pro (Vals AI)Not measured86.6%Only Muse Spark 1.1 measured
GPQA Diamond (Artificial Analysis run)Not measured89.8%Only Muse Spark 1.1 measured
Humanity's Last Exam (Artificial Analysis run)55.0%46.2%Claude Sonnet 5.5
GPQA Diamond (Epoch AI run)95.6%Not measuredOnly Claude Sonnet 5.5 measured
Chess puzzles59.0%34.0%Claude Sonnet 5.5
Mystery game puzzles65.0%Not measuredOnly Claude Sonnet 5.5 measured
LMArena Text: hard prompts14941485Claude Sonnet 5.5
LMArena Text: expert15311478Claude Sonnet 5.5
LMArena Text: hard prompts in English15021480Claude Sonnet 5.5
LMArena Vision: diagrams13291305Claude Sonnet 5.5
LMArena Vision: homework13311287Claude Sonnet 5.5
Neither model has a result on the other 8 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index30
Math benchmarks for Claude Sonnet 5.5 and Muse Spark 1.1
BenchmarkClaude Sonnet 5.5Muse Spark 1.1Leader
OTIS Mock AIME100.0%Not measuredOnly Claude Sonnet 5.5 measured
FrontierMath, tiers 1 to 388.8%Not measuredOnly Claude Sonnet 5.5 measured
FrontierMath, tier 480.5%Not measuredOnly Claude Sonnet 5.5 measured
ProofBench100.0%39.0%Claude Sonnet 5.5
LMArena Text: math14971482Claude Sonnet 5.5
LMArena Text: mathematical work15101487Claude Sonnet 5.5
Neither model has a result on the other 7 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index14
Knowledge benchmarks for Claude Sonnet 5.5 and Muse Spark 1.1
BenchmarkClaude Sonnet 5.5Muse Spark 1.1Leader
MMLU ProNot measured88.7%Only Muse Spark 1.1 measured
LegalBench (Vals AI)Not measured85.0%Only Muse Spark 1.1 measured
CorpFin (Vals AI)Not measured71.3%Only Muse Spark 1.1 measured
TaxEval (Vals AI)Not measured79.7%Only Muse Spark 1.1 measured
MortgageTax (Vals AI)Not measured66.1%Only Muse Spark 1.1 measured
MedCode (Vals AI)52.9%Not measuredOnly Claude Sonnet 5.5 measured
SimpleQA Verified46.5%57.8%Muse Spark 1.1
LMArena Text: science14831484Muse Spark 1.1
LMArena Text: medicine and healthcare14641479Muse Spark 1.1
LMArena Text: legal and government14831481Claude Sonnet 5.5
LMArena Text: business and finance14681470Muse Spark 1.1
Neither model has a result on the other 7 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index60
Web design benchmarks for Claude Sonnet 5.5 and Muse Spark 1.1
BenchmarkClaude Sonnet 5.5Muse Spark 1.1Leader
Design Arena: websites13261270Claude Sonnet 5.5
Design Arena: UI components13681289Claude Sonnet 5.5
Design Arena: game dev14711269Claude Sonnet 5.5
Design Arena: data viz13921268Claude Sonnet 5.5
Design Arena: 3D14451260Claude Sonnet 5.5
Design Arena: all code categories13641276Claude Sonnet 5.5
Design Arena: SVGNot measured1235Only Muse Spark 1.1 measured
Design Arena: ASCII artNot measured1271Only Muse Spark 1.1 measured
LiveBench design85.0%Not measuredOnly Claude Sonnet 5.5 measured
GeneralLike-for-likePublic boards, shown as published, kept out of the index149
General benchmarks for Claude Sonnet 5.5 and Muse Spark 1.1
BenchmarkClaude Sonnet 5.5Muse Spark 1.1Leader
Vals Index70.8%Not measuredOnly Claude Sonnet 5.5 measured
LiveBench data analysis59.5%Not measuredOnly Claude Sonnet 5.5 measured
Public Benefits Bench (Vals AI)67.2%61.3%Claude Sonnet 5.5
SAGE (Vals AI)51.8%45.6%Claude Sonnet 5.5
MedScribe (Vals AI)91.1%88.9%Claude Sonnet 5.5
Vals Multimodal IndexNot measured66.7%Only Muse Spark 1.1 measured
Long context reasoning (AA-LCR)82.7%77.7%Claude Sonnet 5.5
DTBench97.3%94.4%Claude Sonnet 5.5
LMCA68.3%49.9%Claude Sonnet 5.5
Surface Evolver BenchNot measured52.5%Only Muse Spark 1.1 measured
Furniture assembly75.0%Not measuredOnly Claude Sonnet 5.5 measured
LMArena Text14731478Muse Spark 1.1
LMArena Text: instruction following14921457Claude Sonnet 5.5
LMArena Text: creative writing14671435Claude Sonnet 5.5
LMArena Vision12871293Muse Spark 1.1
LMArena Text: English14841478Claude Sonnet 5.5
LMArena Text: non-English14561471Muse Spark 1.1
LMArena Text: Chinese15351515Claude Sonnet 5.5
LMArena Text: GermanNot measured1469Only Muse Spark 1.1 measured
LMArena Text: JapaneseNot measured1450Only Muse Spark 1.1 measured
LMArena Text: KoreanNot measured1459Only Muse Spark 1.1 measured
LMArena Text: French14991492Claude Sonnet 5.5
LMArena Text: Spanish14511464Muse Spark 1.1
LMArena Text: Russian14541482Muse Spark 1.1
LMArena Text: PolishNot measured1499Only Muse Spark 1.1 measured
LMArena Text: multi-turn14651484Muse Spark 1.1
LMArena Text: longer queries14951462Claude Sonnet 5.5
LMArena Text: writing and language14741448Claude Sonnet 5.5
LMArena Text: entertainment and media14611438Claude Sonnet 5.5
LMArena Vision: English12891292Muse Spark 1.1
LMArena Vision: ChineseNot measured1348Only Muse Spark 1.1 measured
LMArena Vision: reading text12971301Muse Spark 1.1
LMArena Vision: humorNot measured1288Only Muse Spark 1.1 measured
LMArena Vision: creative writing12421253Muse Spark 1.1
LMArena DocumentNot measured1465Only Muse Spark 1.1 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 5.5 and Muse Spark 1.1
BenchmarkClaude Sonnet 5.5Muse Spark 1.1Leader
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 5.5$0.0070Fits in one request
Muse Spark 1.1$0.0034Fits in one request

Muse Spark 1.1 costs less

Repository review

50K input + 3K output tokens

Claude Sonnet 5.5$0.130Fits in one request
Muse Spark 1.1$0.075Fits in one request

Muse Spark 1.1 costs less

Agent loop

200K input + 10K output tokens

Claude Sonnet 5.5$0.500Fits in one request
Muse Spark 1.1$0.292Fits in one request

Muse Spark 1.1 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 5.5 and Muse Spark 1.1
SpecificationAnthropic Claude Sonnet 5.5Meta Muse Spark 1.1
MakerAnthropicMeta
WeightsNo public weights listedNo public weights listed
ReleasedSeptember 28, 2026July 16, 2026
Context window1M1.05M
Input $/Mtok$2.00$1.25
Output $/Mtok$10.00$4.25
Coding index87.370.3
Independent measurements behind it53
Cost per solved taskNot computable$0.43
SourceOpenRouter listingOpenRouter listing

Questions

Is Claude Sonnet 5.5 better than Muse Spark 1.1 for coding?

Pick Claude Sonnet 5.5 for coding: it scores 87.3 on the Vibe Coding Index against 70.3 for Muse Spark 1.1. Pick Muse Spark 1.1 for output tokens 2.4x cheaper ($4.25 vs $10.00 per million) and a larger context window (1.05M against 1M tokens).

Which is cheaper, Claude Sonnet 5.5 or Muse Spark 1.1?

Claude Sonnet 5.5 costs $2.00 per million input tokens and $10.00 per million output tokens; Muse Spark 1.1 costs $1.25 and $4.25. Cost per solved task is known for Muse Spark 1.1 only.

Which has the bigger context window, Claude Sonnet 5.5 or Muse Spark 1.1?

Muse Spark 1.1, with 1.05M tokens against 1M.

How many benchmarks is the Claude Sonnet 5.5 vs Muse Spark 1.1 comparison based on?

65 benchmarks have a result for both models as of October 22, 2026. Claude Sonnet 5.5's coding index rests on 5 independent benchmarks and Muse Spark 1.1's on 3. Where only one model has a result, the page says so instead of naming a winner.

Compare next

Embed this comparison on your site

Free under CC BY 4.0, while the source link stays visible. Preview the frame · Terms and other embeds

<iframe src="https://llmbenchmark.ai/embed/compare/claude-sonnet-5-5-vs-meta-muse-spark-1-1" title="Claude Sonnet 5.5 vs Muse Spark 1.1, LLMBenchmark.ai" width="100%" height="360" style="border:0;max-width:100%" loading="lazy"></iframe>
<p style="font:13px/1.4 sans-serif;margin:6px 0 0">Source: <a href="https://llmbenchmark.ai/compare/claude-sonnet-5-5-vs-meta-muse-spark-1-1">LLMBenchmark.ai, Claude Sonnet 5.5 vs Muse Spark 1.1</a></p>