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Muse Spark 1.1 vs Muse Spark 1.2

Muse Spark 1.1 leads Muse Spark 1.2 on coding, 70.3 to 55.7 on the Vibe Coding Index, at about the same output price ($4.25 vs $4.25 per million). Updated October 22, 2026; 80 benchmarks have a result for both.

Replace Muse Spark 1.1 Replace Muse Spark 1.2
Muse Spark 1.1Meta
Coding
70.3
Overall
67.0
Output $/M
$4.25
18
Muse Spark 1.2Meta
Coding
55.7
Overall
60.4
Output $/M
$4.25
62
vs boards won of 80 shared

Muse Spark 1.1 or Muse Spark 1.2: which to pick

Pick Muse Spark 1.1 for coding: it scores 70.3 on the Vibe Coding Index against 55.7 for Muse Spark 1.2, though on 3 benchmarks against 5.

Pick Muse Spark 1.2 for work measured by AA Coding Index or SWE-bench Verified (Vals AI), where it leads.

Model AMuse Spark 1.1Meta70.3/1003 independent benchmarks$0.43 per solved taskModel BMuse Spark 1.2Meta55.7/1005 independent benchmarks$0.64 per solved task
Shared results
80
Muse Spark 1.1 only
24
Muse Spark 1.2 only
17
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 1.2 55.7 from 5 benchmarks.
Widest category
Agentic work, 5.3 points apart on average over 12 shared benchmarks.
Widest single gap
AA Agentic Index: Muse Spark 1.1 25.8 against Muse Spark 1.2 43.2, 17.4 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 1.2Ties
Coding58
Intelligence02
Agentic work210
Reasoning44
Math12
Knowledge37
Web design08
General321
All shared boards1862
CodingLike-for-likeSix of these boards feed the Vibe Coding Index58
Coding benchmarks for Muse Spark 1.1 and Muse Spark 1.2
BenchmarkMuse Spark 1.1Muse Spark 1.2Leader
LiveBench codingNot measured78.2%Only Muse Spark 1.2 measured
LMArena WebDev15421534Muse Spark 1.1
AA Coding Index71.372.2Muse Spark 1.2
LiveCodeBench (Vals AI)85.9%Not measuredOnly Muse Spark 1.1 measured
SWE-bench Verified (Vals AI)82.0%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)72.2%79.1%Muse Spark 1.2
Code migration (Vals AI)31.1%29.9%Muse Spark 1.1
ProgramBench (Vals AI)0.0%0.5%Muse Spark 1.2
IOI (Vals AI)Not measured21.8%Only Muse Spark 1.2 measured
Terminal-Bench 2.1 (Vals AI)69.3%69.7%Muse Spark 1.2
SkillsBench (Vals AI)59.2%53.0%Muse Spark 1.1
CyberBench (Vals AI)Not measured69.5%Only Muse Spark 1.2 measured
SciCode58.8%57.4%Muse Spark 1.1
FrontierSWENot measured12.0%Only Muse Spark 1.2 measured
WeirdMLNot measured60.3%Only Muse Spark 1.2 measured
LMArena Text: coding14981505Muse Spark 1.2
LMArena Text: software and IT14981505Muse Spark 1.2
LMArena WebDev: React15321526Muse Spark 1.1
LMArena WebDev: HTML15401543Muse Spark 1.2
LMArena WebDev: from an image1540Not measuredOnly Muse Spark 1.1 measured
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 1.2
BenchmarkMuse Spark 1.1Muse Spark 1.2Leader
AA Intelligence Index33.739.6Muse Spark 1.2
Epoch Capabilities Index154.1155.1Muse Spark 1.2
Agentic workLike-for-likePublic boards, shown as published, kept out of the index210
Agentic work benchmarks for Muse Spark 1.1 and Muse Spark 1.2
BenchmarkMuse Spark 1.1Muse Spark 1.2Leader
AA Agentic Index25.843.2Muse Spark 1.2
Design Arena: agents building web apps12071221Muse Spark 1.2
Design Arena: agents building full-stack apps11991210Muse Spark 1.2
Design Arena: agents building mobile apps11751181Muse Spark 1.2
Design Arena: agents building Android apps11781222Muse Spark 1.2
Design Arena: agents building Godot games1103Not measuredOnly Muse Spark 1.1 measured
Design Arena: agents building games11831178Muse Spark 1.1
Design Arena: HTML slides11451074Muse Spark 1.1
Design Arena: PowerPoint slides11341170Muse Spark 1.2
Design Arena: spreadsheets1021Not measuredOnly Muse Spark 1.1 measured
LiveBench researchNot measured67.7%Only Muse Spark 1.2 measured
LiveBench browserNot measured36.0%Only Muse Spark 1.2 measured
LiveBench long agenticNot measured21.3%Only Muse Spark 1.2 measured
SREBench (Vals AI)Not measured0.0%Only Muse Spark 1.2 measured
Finance Agent (Vals AI)57.2%60.6%Muse Spark 1.2
Tax Agent Bench (Vals AI)Not measured32.8%Only Muse Spark 1.2 measured
Legal Research Bench (Vals AI)38.0%43.8%Muse Spark 1.2
Excel Modeling Benchmark (Vals AI)56.4%57.0%Muse Spark 1.2
BioMysteryBench (Vals AI)Not measured64.8%Only Muse Spark 1.2 measured
Time Horizon Index (Vals AI)1.7%Not measuredOnly Muse Spark 1.1 measured
APEX-Agents31.8%45.4%Muse Spark 1.2
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 19 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index44
Reasoning benchmarks for Muse Spark 1.1 and Muse Spark 1.2
BenchmarkMuse Spark 1.1Muse Spark 1.2Leader
GPQA Diamond91.2%Not measuredOnly Muse Spark 1.1 measured
LiveBench reasoningNot measured90.0%Only Muse Spark 1.2 measured
MMMU Pro (Vals AI)86.6%86.1%Muse Spark 1.1
GPQA Diamond (Artificial Analysis run)89.8%90.4%Muse Spark 1.2
Humanity's Last Exam (Artificial Analysis run)46.2%45.5%Muse Spark 1.1
SimpleBenchNot measured74.5%Only Muse Spark 1.2 measured
Chess puzzles34.0%27.0%Muse Spark 1.1
LMArena Text: hard prompts14851489Muse Spark 1.2
LMArena Text: expert14781475Muse Spark 1.1
LMArena Text: hard prompts in English14801487Muse Spark 1.2
LMArena Vision: diagrams13051317Muse Spark 1.2
LMArena Vision: homework1287Not measuredOnly Muse Spark 1.1 measured
Neither model has a result on the other 11 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index12
Math benchmarks for Muse Spark 1.1 and Muse Spark 1.2
BenchmarkMuse Spark 1.1Muse Spark 1.2Leader
ProofBench39.0%43.0%Muse Spark 1.2
LMArena Text: math14821484Muse Spark 1.2
LMArena Text: mathematical work14871480Muse Spark 1.1
MathArena42.5%Not measuredOnly Muse Spark 1.1 measured
Neither model has a result on the other 10 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index37
Knowledge benchmarks for Muse Spark 1.1 and Muse Spark 1.2
BenchmarkMuse Spark 1.1Muse Spark 1.2Leader
MMLU Pro88.7%88.3%Muse Spark 1.1
LegalBench (Vals AI)85.0%85.3%Muse Spark 1.2
CorpFin (Vals AI)71.3%70.9%Muse Spark 1.1
TaxEval (Vals AI)79.7%80.4%Muse Spark 1.2
MortgageTax (Vals AI)66.1%65.4%Muse Spark 1.1
MedCode (Vals AI)Not measured49.4%Only Muse Spark 1.2 measured
SimpleQA Verified57.8%60.3%Muse Spark 1.2
LMArena Text: science14841500Muse Spark 1.2
LMArena Text: medicine and healthcare14791496Muse Spark 1.2
LMArena Text: legal and government14811517Muse Spark 1.2
LMArena Text: business and finance14701484Muse Spark 1.2
PRBench Finance55.0%Not measuredOnly Muse Spark 1.1 measured
PRBench Legal57.0%Not measuredOnly Muse Spark 1.1 measured
Neither model has a result on the other 7 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 1.2
BenchmarkMuse Spark 1.1Muse Spark 1.2Leader
Design Arena: websites12701312Muse Spark 1.2
Design Arena: UI components12871299Muse Spark 1.2
Design Arena: game dev12691300Muse Spark 1.2
Design Arena: data viz12671334Muse Spark 1.2
Design Arena: 3D12591300Muse Spark 1.2
Design Arena: all code categories12761312Muse Spark 1.2
Design Arena: SVG12341283Muse Spark 1.2
Design Arena: ASCII art12691284Muse Spark 1.2
LiveBench designNot measured67.1%Only Muse Spark 1.2 measured
GeneralLike-for-likePublic boards, shown as published, kept out of the index321
General benchmarks for Muse Spark 1.1 and Muse Spark 1.2
BenchmarkMuse Spark 1.1Muse Spark 1.2Leader
LiveBench data analysisNot measured76.5%Only Muse Spark 1.2 measured
Public Benefits Bench (Vals AI)61.3%68.5%Muse Spark 1.2
SAGE (Vals AI)45.6%47.7%Muse Spark 1.2
MedScribe (Vals AI)88.9%90.1%Muse Spark 1.2
Vals Multimodal Index66.7%69.8%Muse Spark 1.2
Long context reasoning (AA-LCR)77.7%79.0%Muse Spark 1.2
DTBench94.4%94.7%Muse Spark 1.2
LMCA49.9%48.4%Muse Spark 1.1
Surface Evolver Bench52.5%Not measuredOnly Muse Spark 1.1 measured
LMArena Text14781482Muse Spark 1.2
LMArena Text: instruction following14571462Muse Spark 1.2
LMArena Text: creative writing14351436Muse Spark 1.2
LMArena Vision12931304Muse Spark 1.2
LMArena Text: English14781483Muse Spark 1.2
LMArena Text: non-English14711476Muse Spark 1.2
LMArena Text: Chinese15151509Muse Spark 1.1
LMArena Text: German1469Not measuredOnly Muse Spark 1.1 measured
LMArena Text: Japanese1450Not measuredOnly Muse Spark 1.1 measured
LMArena Text: Korean14591462Muse Spark 1.2
LMArena Text: French14921495Muse Spark 1.2
LMArena Text: Spanish14641484Muse Spark 1.2
LMArena Text: Russian14821483Muse Spark 1.2
LMArena Text: Polish1499Not measuredOnly Muse Spark 1.1 measured
LMArena Text: multi-turn14841502Muse Spark 1.2
LMArena Text: longer queries14621473Muse Spark 1.2
LMArena Text: writing and language14481453Muse Spark 1.2
LMArena Text: entertainment and media14381443Muse Spark 1.2
LMArena Vision: English12921291Muse Spark 1.1
LMArena Vision: Chinese1348Not measuredOnly Muse Spark 1.1 measured
LMArena Vision: reading text13011313Muse Spark 1.2
LMArena Vision: humor1288Not measuredOnly Muse Spark 1.1 measured
LMArena Vision: creative writing1253Not measuredOnly Muse Spark 1.1 measured
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 1.2
BenchmarkMuse Spark 1.1Muse 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

Muse Spark 1.1$0.0034Fits in one request
Muse Spark 1.2$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 1.2$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 1.2$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 1.2
SpecificationMeta Muse Spark 1.1Meta Muse Spark 1.2
MakerMetaMeta
WeightsNo public weights listedNo public weights listed
ReleasedJuly 16, 2026August 5, 2026
Context window1.05M1.05M
Input $/Mtok$1.25$1.25
Output $/Mtok$4.25$4.25
Coding index70.355.7
Independent measurements behind it35
Cost per solved task$0.43$0.64
SourceOpenRouter listingOpenRouter listing

Questions

Is Muse Spark 1.1 better than Muse Spark 1.2 for coding?

Pick Muse Spark 1.1 for coding: it scores 70.3 on the Vibe Coding Index against 55.7 for Muse Spark 1.2, though on 3 benchmarks against 5. Pick Muse Spark 1.2 for work measured by AA Coding Index or SWE-bench Verified (Vals AI), where it leads.

Which is cheaper, Muse Spark 1.1 or Muse Spark 1.2?

Muse Spark 1.1 costs $1.25 per million input tokens and $4.25 per million output tokens; Muse Spark 1.2 costs $1.25 and $4.25. Per solved SWE-bench Verified task, Muse Spark 1.1 costs $0.43 and Muse Spark 1.2 $0.64.

Which has the bigger context window, Muse Spark 1.1 or Muse Spark 1.2?

Neither: both take 1.05M tokens.

How many benchmarks is the Muse Spark 1.1 vs Muse Spark 1.2 comparison based on?

80 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 1.2's on 5. 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/meta-muse-spark-1-1-vs-meta-muse-spark-1-2">LLMBenchmark.ai, Muse Spark 1.1 vs Muse Spark 1.2</a></p>