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Muse Spark 1.1 vs Muse Spark 1.3

Muse Spark 1.1 leads Muse Spark 1.3 on coding, 70.3 to 57.4 on the Vibe Coding Index, at about the same output price ($4.25 vs $4.25 per million). Updated October 22, 2026; 77 benchmarks have a result for both.

Replace Muse Spark 1.1 Replace Muse Spark 1.3
Muse Spark 1.1Meta
Coding
70.3
Overall
67.0
Output $/M
$4.25
2
Muse Spark 1.3Meta
Coding
57.4
Overall
68.6
Output $/M
$4.25
75
vs boards won of 77 shared

Muse Spark 1.1 or Muse Spark 1.3: which to pick

Pick Muse Spark 1.1 for coding: it scores 70.3 on the Vibe Coding Index against 57.4 for Muse Spark 1.3, though on 3 benchmarks against 4.

Pick Muse Spark 1.3 for work measured by LMArena WebDev or AA Coding Index, where it leads.

Model AMuse Spark 1.1Meta70.3/1003 independent benchmarks$0.43 per solved taskModel BMuse Spark 1.3Meta57.4/1004 independent benchmarksNo cost per solved task
Shared results
77
Muse Spark 1.1 only
27
Muse Spark 1.3 only
19
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
Muse Spark 1.1 70.3 from 3 benchmarks, Muse Spark 1.3 57.4 from 4 benchmarks.
Widest category
Agentic work, 11.8 points apart on average over 11 shared benchmarks.
Widest single gap
AA Agentic Index: Muse Spark 1.1 25.8 against Muse Spark 1.3 55.5, 29.7 points apart on a 0 to 100 scale.
Output price
Both cost $4.25 per million output tokens.
Context window
Both take 1.05M 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
CategoryMuse Spark 1.1BarsMuse Spark 1.3Ties
Coding111
Intelligence02
Agentic work011
Reasoning08
Math04
Knowledge06
Web design08
General125
All shared boards275
CodingLike-for-likeSix of these boards feed the Vibe Coding Index111
Coding benchmarks for Muse Spark 1.1 and Muse Spark 1.3
BenchmarkMuse Spark 1.1Muse Spark 1.3Leader
LiveBench codingNot measured90.2%Only Muse Spark 1.3 measured
LMArena WebDev15421659Muse Spark 1.3
AA Coding Index71.375.8Muse Spark 1.3
LiveCodeBench (Vals AI)85.9%Not measuredOnly Muse Spark 1.1 measured
SWE-bench Verified (Vals AI)82.0%Not measuredOnly Muse Spark 1.1 measured
Terminal-Bench 4 (Vals AI)Not measured10.6%Only Muse Spark 1.3 measured
Vibe Code Bench (Vals AI)72.2%82.9%Muse Spark 1.3
Code migration (Vals AI)31.1%27.6%Muse Spark 1.1
ProgramBench (Vals AI)0.0%0.5%Muse Spark 1.3
IOI (Vals AI)Not measured43.9%Only Muse Spark 1.3 measured
Terminal-Bench 2.1 (Vals AI)69.3%72.3%Muse Spark 1.3
SkillsBench (Vals AI)59.2%Not measuredOnly Muse Spark 1.1 measured
CyberBench (Vals AI)Not measured69.4%Only Muse Spark 1.3 measured
SciCode58.8%59.7%Muse Spark 1.3
FrontierSWENot measured25.8%Only Muse Spark 1.3 measured
ALE-BenchNot measured1688.3Only Muse Spark 1.3 measured
LMArena Text: coding14981510Muse Spark 1.3
LMArena Text: software and IT14981511Muse Spark 1.3
LMArena WebDev: React15321672Muse Spark 1.3
LMArena WebDev: HTML15401653Muse Spark 1.3
LMArena WebDev: from an image15401640Muse Spark 1.3
SWE Atlas: Codebase QnA42.2%Not measuredOnly Muse Spark 1.1 measured
SWE Atlas: Test Writing41.5%Not measuredOnly Muse Spark 1.1 measured
Neither model has a result on the other 20 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index02
Intelligence benchmarks for Muse Spark 1.1 and Muse Spark 1.3
BenchmarkMuse Spark 1.1Muse Spark 1.3Leader
AA Intelligence Index33.748.1Muse Spark 1.3
Epoch Capabilities Index154.1157.2Muse Spark 1.3
Agentic workLike-for-likePublic boards, shown as published, kept out of the index011
Agentic work benchmarks for Muse Spark 1.1 and Muse Spark 1.3
BenchmarkMuse Spark 1.1Muse Spark 1.3Leader
AA Agentic Index25.855.5Muse Spark 1.3
Design Arena: agents building web apps12071297Muse Spark 1.3
Design Arena: agents building full-stack apps11991295Muse Spark 1.3
Design Arena: agents building mobile apps11751217Muse Spark 1.3
Design Arena: agents building Android apps1178Not measuredOnly Muse Spark 1.1 measured
Design Arena: agents building Godot games11031241Muse Spark 1.3
Design Arena: agents building games1183Not measuredOnly Muse Spark 1.1 measured
Design Arena: HTML slides1145Not measuredOnly Muse Spark 1.1 measured
Design Arena: PowerPoint slides11341217Muse Spark 1.3
Design Arena: spreadsheets10211075Muse Spark 1.3
LiveBench researchNot measured68.6%Only Muse Spark 1.3 measured
LiveBench browserNot measured80.0%Only Muse Spark 1.3 measured
LiveBench long agenticNot measured40.4%Only Muse Spark 1.3 measured
Finance Agent (Vals AI)57.2%58.9%Muse Spark 1.3
Tax Agent Bench (Vals AI)Not measured36.0%Only Muse Spark 1.3 measured
Legal Research Bench (Vals AI)38.0%40.9%Muse Spark 1.3
Excel Modeling Benchmark (Vals AI)56.4%62.7%Muse Spark 1.3
Terminal-Bench-Science (Vals AI)Not measured4.3%Only Muse Spark 1.3 measured
Time Horizon Index (Vals AI)1.7%Not measuredOnly Muse Spark 1.1 measured
APEX-Agents31.8%58.6%Muse Spark 1.3
Vending-Bench 2$6,520Not measuredOnly Muse Spark 1.1 measured
MCP Atlas88.1%Not measuredOnly Muse Spark 1.1 measured
Neither model has a result on the other 20 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index08
Reasoning benchmarks for Muse Spark 1.1 and Muse Spark 1.3
BenchmarkMuse Spark 1.1Muse Spark 1.3Leader
GPQA Diamond91.2%Not measuredOnly Muse Spark 1.1 measured
LiveBench reasoningNot measured89.7%Only Muse Spark 1.3 measured
MMMU Pro (Vals AI)86.6%Not measuredOnly Muse Spark 1.1 measured
GPQA Diamond (Artificial Analysis run)89.8%94.1%Muse Spark 1.3
Humanity's Last Exam (Artificial Analysis run)46.2%48.7%Muse Spark 1.3
Chess puzzles34.0%37.0%Muse Spark 1.3
Mystery game puzzlesNot measured25.0%Only Muse Spark 1.3 measured
LMArena Text: hard prompts14851503Muse Spark 1.3
LMArena Text: expert14781519Muse Spark 1.3
LMArena Text: hard prompts in English14801500Muse Spark 1.3
LMArena Vision: diagrams13051330Muse Spark 1.3
LMArena Vision: homework12871296Muse Spark 1.3
Humanity's Last Exam (Scale run)Not measured25.4%Only Muse Spark 1.3 measured
Neither model has a result on the other 10 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index04
Math benchmarks for Muse Spark 1.1 and Muse Spark 1.3
BenchmarkMuse Spark 1.1Muse Spark 1.3Leader
OTIS Mock AIMENot measured99.2%Only Muse Spark 1.3 measured
FrontierMath, tiers 1 to 3Not measured74.4%Only Muse Spark 1.3 measured
FrontierMath, tier 4Not measured46.3%Only Muse Spark 1.3 measured
ProofBench39.0%58.0%Muse Spark 1.3
LMArena Text: math14821497Muse Spark 1.3
LMArena Text: mathematical work14871491Muse Spark 1.3
MathArena42.5%43.0%Muse 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 index06
Knowledge benchmarks for Muse Spark 1.1 and Muse Spark 1.3
BenchmarkMuse Spark 1.1Muse Spark 1.3Leader
MMLU Pro88.7%Not measuredOnly Muse Spark 1.1 measured
LegalBench (Vals AI)85.0%Not measuredOnly Muse Spark 1.1 measured
CorpFin (Vals AI)71.3%Not measuredOnly Muse Spark 1.1 measured
TaxEval (Vals AI)79.7%Not measuredOnly Muse Spark 1.1 measured
MortgageTax (Vals AI)66.1%Not measuredOnly Muse Spark 1.1 measured
SimpleQA Verified57.8%Not measuredOnly Muse Spark 1.1 measured
LMArena Text: science14841507Muse Spark 1.3
LMArena Text: medicine and healthcare14791493Muse Spark 1.3
LMArena Text: legal and government14811499Muse Spark 1.3
LMArena Text: business and finance14701490Muse Spark 1.3
PRBench Finance55.0%59.5%Muse Spark 1.3
PRBench Legal57.0%61.6%Muse Spark 1.3
Neither model has a result on the other 8 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index08
Web design benchmarks for Muse Spark 1.1 and Muse Spark 1.3
BenchmarkMuse Spark 1.1Muse Spark 1.3Leader
Design Arena: websites12701356Muse Spark 1.3
Design Arena: UI components12871350Muse Spark 1.3
Design Arena: game dev12691328Muse Spark 1.3
Design Arena: data viz12671344Muse Spark 1.3
Design Arena: 3D12591358Muse Spark 1.3
Design Arena: all code categories12761352Muse Spark 1.3
Design Arena: SVG12341301Muse Spark 1.3
Design Arena: ASCII art12691283Muse Spark 1.3
LiveBench designNot measured74.8%Only Muse Spark 1.3 measured
GeneralLike-for-likePublic boards, shown as published, kept out of the index125
General benchmarks for Muse Spark 1.1 and Muse Spark 1.3
BenchmarkMuse Spark 1.1Muse Spark 1.3Leader
LiveBench data analysisNot measured79.6%Only Muse Spark 1.3 measured
Public Benefits Bench (Vals AI)61.3%Not measuredOnly Muse Spark 1.1 measured
SAGE (Vals AI)45.6%Not measuredOnly Muse Spark 1.1 measured
MedScribe (Vals AI)88.9%Not measuredOnly Muse Spark 1.1 measured
Vals Multimodal Index66.7%Not measuredOnly Muse Spark 1.1 measured
Long context reasoning (AA-LCR)77.7%83.0%Muse Spark 1.3
DTBench94.4%96.5%Muse Spark 1.3
LMCA49.9%53.9%Muse Spark 1.3
Surface Evolver Bench52.5%Not measuredOnly Muse Spark 1.1 measured
LMArena Text14781490Muse Spark 1.3
LMArena Text: instruction following14571479Muse Spark 1.3
LMArena Text: creative writing14351462Muse Spark 1.3
LMArena Vision12931308Muse Spark 1.3
LMArena Text: English14781495Muse Spark 1.3
LMArena Text: non-English14711481Muse Spark 1.3
LMArena Text: Chinese15151532Muse Spark 1.3
LMArena Text: German14691513Muse Spark 1.3
LMArena Text: Japanese14501470Muse Spark 1.3
LMArena Text: Korean14591490Muse Spark 1.3
LMArena Text: French14921511Muse Spark 1.3
LMArena Text: Spanish14641496Muse Spark 1.3
LMArena Text: Russian14821491Muse Spark 1.3
LMArena Text: Polish14991490Muse Spark 1.1
LMArena Text: multi-turn14841487Muse Spark 1.3
LMArena Text: longer queries14621488Muse Spark 1.3
LMArena Text: writing and language14481470Muse Spark 1.3
LMArena Text: entertainment and media14381457Muse Spark 1.3
LMArena Vision: English12921298Muse Spark 1.3
LMArena Vision: Chinese13481384Muse Spark 1.3
LMArena Vision: reading text13011319Muse Spark 1.3
LMArena Vision: humor12881293Muse Spark 1.3
LMArena Vision: creative writing12531296Muse Spark 1.3
LMArena Document1465Not measuredOnly Muse Spark 1.1 measured
MultiChallenge75.3%Not measuredOnly Muse Spark 1.1 measured
EQ-Bench 41260Not measuredOnly Muse Spark 1.1 measured
Neither model has a result on the other 13 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for Muse Spark 1.1 and Muse Spark 1.3
BenchmarkMuse Spark 1.1Muse 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

Muse Spark 1.1$0.0034Fits in one request
Muse Spark 1.3$0.0034Fits in one request

Same cost

Repository review

50K input + 3K output tokens

Muse Spark 1.1$0.075Fits in one request
Muse Spark 1.3$0.075Fits in one request

Same cost

Agent loop

200K input + 10K output tokens

Muse Spark 1.1$0.292Fits in one request
Muse Spark 1.3$0.292Fits in one request

Same cost

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 Muse Spark 1.1 and Muse Spark 1.3
SpecificationMeta Muse Spark 1.1Meta Muse Spark 1.3
MakerMetaMeta
WeightsNo public weights listedNo public weights listed
ReleasedJuly 16, 2026September 2, 2026
Context window1.05M1.05M
Input $/Mtok$1.25$1.25
Output $/Mtok$4.25$4.25
Coding index70.357.4
Independent measurements behind it34
Cost per solved task$0.43Not computable
SourceOpenRouter listingOpenRouter listing

Questions

Is Muse Spark 1.1 better than Muse Spark 1.3 for coding?

Pick Muse Spark 1.1 for coding: it scores 70.3 on the Vibe Coding Index against 57.4 for Muse Spark 1.3, though on 3 benchmarks against 4. Pick Muse Spark 1.3 for work measured by LMArena WebDev or AA Coding Index, where it leads.

Which is cheaper, Muse Spark 1.1 or Muse Spark 1.3?

Muse Spark 1.1 costs $1.25 per million input tokens and $4.25 per million output tokens; Muse Spark 1.3 costs $1.25 and $4.25. Cost per solved task is known for Muse Spark 1.1 only.

Which has the bigger context window, Muse Spark 1.1 or Muse Spark 1.3?

Neither: both take 1.05M tokens.

How many benchmarks is the Muse Spark 1.1 vs Muse Spark 1.3 comparison based on?

77 benchmarks have a result for both models as of October 22, 2026. Muse Spark 1.1's coding index rests on 3 independent benchmarks and Muse Spark 1.3's on 4. Where only one model has a result, the page says so instead of naming a winner.

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<iframe src="https://llmbenchmark.ai/embed/compare/meta-muse-spark-1-1-vs-meta-muse-spark-1-3" title="Muse Spark 1.1 vs Muse Spark 1.3, 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/meta-muse-spark-1-1-vs-meta-muse-spark-1-3">LLMBenchmark.ai, Muse Spark 1.1 vs Muse Spark 1.3</a></p>