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Muse Spark 1.3 vs Qwen3.5-Flash

Updated October 21, 2026. 39 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.

Replace Muse Spark 1.3 Replace Qwen3.5-Flash
Muse Spark 1.3Meta
Coding
79.7
Overall
48.1
Output $/M
$4.25
39
Qwen3.5-FlashQwen
Coding
6.2
Overall
No data
Output $/M
$0.26
0
vs boards won of 39 shared

Decision reading

Pick Muse Spark 1.3 for coding: it scores 79.7 on the Vibe Coding Index against 6.2 for Qwen3.5-Flash.

Pick Qwen3.5-Flash when output tokens cost 16.3x less.

Model AMuse Spark 1.3Meta79.7/1002 independent benchmarksNo cost per solved taskModel BQwen3.5-FlashQwen6.2/1001 independent benchmark$0.40 per solved task
Shared results
39
Muse Spark 1.3 only
53
Qwen3.5-Flash only
16
Like-for-like categories
6 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
Muse Spark 1.3 79.7 from 2 benchmarks, Qwen3.5-Flash 6.2 from 1 benchmark.
Widest category
Coding, 42.0 points apart on average over 6 shared benchmarks.
Widest single gap
LMArena WebDev: React: Muse Spark 1.3 1672 against Qwen3.5-Flash 1229, 61.8 points apart on a 0 to 100 scale.
Output price
Muse Spark 1.3 $4.25 against Qwen3.5-Flash $0.26 per million output tokens, 16.3x apart.
Context window
Muse Spark 1.3 takes 1.05M tokens, Qwen3.5-Flash 1M.

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 1.3BarsQwen3.5-FlashTies
Coding60
Intelligence10
Reasoning50
Math40
Knowledge40
General190
All shared boards390
CodingLike-for-likeFour of these boards feed the Vibe Coding Index60
Coding benchmarks for Muse Spark 1.3 and Qwen3.5-Flash
BenchmarkMuse Spark 1.3Qwen3.5-FlashLeader
LiveBench coding90.2%Not measuredOnly Muse Spark 1.3 measured
LMArena WebDev16591244Muse Spark 1.3
AA Coding Index75.8Not measuredOnly Muse Spark 1.3 measured
LiveCodeBench (Vals AI)Not measured83.3%Only Qwen3.5-Flash measured
SWE-bench Verified (Vals AI)Not measured64.4%Only Qwen3.5-Flash measured
Terminal-Bench 4 (Vals AI)10.6%Not measuredOnly Muse Spark 1.3 measured
Vibe Code Bench (Vals AI)82.9%Not measuredOnly Muse Spark 1.3 measured
Code migration (Vals AI)27.6%Not measuredOnly Muse Spark 1.3 measured
ProgramBench (Vals AI)0.5%Not measuredOnly Muse Spark 1.3 measured
IOI (Vals AI)43.9%Not measuredOnly Muse Spark 1.3 measured
Terminal-Bench 2.1 (Vals AI)72.3%Not measuredOnly Muse Spark 1.3 measured
CyberBench (Vals AI)69.4%Not measuredOnly Muse Spark 1.3 measured
SciCode59.7%Not measuredOnly Muse Spark 1.3 measured
FrontierSWE25.8%Not measuredOnly Muse Spark 1.3 measured
ALE-Bench1688.3265.9Muse Spark 1.3
LMArena Text: coding15101412Muse Spark 1.3
LMArena Text: software and IT15111416Muse Spark 1.3
LMArena WebDev: React16721229Muse Spark 1.3
LMArena WebDev: HTML16531291Muse Spark 1.3
LMArena WebDev: from an image1640Not measuredOnly Muse Spark 1.3 measured
Neither model has a result on the other 18 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index10
Intelligence benchmarks for Muse Spark 1.3 and Qwen3.5-Flash
BenchmarkMuse Spark 1.3Qwen3.5-FlashLeader
AA Intelligence Index48.1Not measuredOnly Muse Spark 1.3 measured
Epoch Capabilities Index157.2143.5Muse Spark 1.3
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index16 boards, none shared
Agentic work benchmarks for Muse Spark 1.3 and Qwen3.5-Flash
BenchmarkMuse Spark 1.3Qwen3.5-FlashLeader
AA Agentic Index55.5Not measuredOnly Muse Spark 1.3 measured
Design Arena: agents building web apps1297Not measuredOnly Muse Spark 1.3 measured
Design Arena: agents building full-stack apps1295Not measuredOnly Muse Spark 1.3 measured
Design Arena: agents building mobile apps1217Not measuredOnly Muse Spark 1.3 measured
Design Arena: agents building Godot games1241Not measuredOnly Muse Spark 1.3 measured
Design Arena: PowerPoint slides1244Not measuredOnly Muse Spark 1.3 measured
Design Arena: spreadsheets1048Not measuredOnly Muse Spark 1.3 measured
LiveBench research68.6%Not measuredOnly Muse Spark 1.3 measured
LiveBench browser80.0%Not measuredOnly Muse Spark 1.3 measured
LiveBench long agentic40.4%Not measuredOnly Muse Spark 1.3 measured
Finance Agent (Vals AI)58.9%Not measuredOnly Muse Spark 1.3 measured
Tax Agent Bench (Vals AI)36.0%Not measuredOnly Muse Spark 1.3 measured
Legal Research Bench (Vals AI)40.9%Not measuredOnly Muse Spark 1.3 measured
Excel Modeling Benchmark (Vals AI)62.7%Not measuredOnly Muse Spark 1.3 measured
Terminal-Bench-Science (Vals AI)4.3%Not measuredOnly Muse Spark 1.3 measured
APEX-Agents58.6%Not measuredOnly Muse Spark 1.3 measured
Neither model has a result on the other 23 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index50
Reasoning benchmarks for Muse Spark 1.3 and Qwen3.5-Flash
BenchmarkMuse Spark 1.3Qwen3.5-FlashLeader
GPQA DiamondNot measured82.8%Only Qwen3.5-Flash measured
LiveBench reasoning89.7%Not measuredOnly Muse Spark 1.3 measured
MMMU Pro (Vals AI)Not measured81.9%Only Qwen3.5-Flash measured
GPQA Diamond (Artificial Analysis run)94.1%Not measuredOnly Muse Spark 1.3 measured
Humanity's Last Exam (Artificial Analysis run)48.7%Not measuredOnly Muse Spark 1.3 measured
GPQA Diamond (Epoch AI run)Not measured82.3%Only Qwen3.5-Flash measured
Chess puzzles37.0%14.0%Muse Spark 1.3
Mystery game puzzles25.0%20.0%Muse Spark 1.3
LMArena Text: hard prompts15031403Muse Spark 1.3
LMArena Text: expert15191407Muse Spark 1.3
LMArena Text: hard prompts in English15001409Muse Spark 1.3
LMArena Vision: diagrams1330Not measuredOnly Muse Spark 1.3 measured
LMArena Vision: homework1296Not measuredOnly Muse Spark 1.3 measured
Neither model has a result on the other 8 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index40
Math benchmarks for Muse Spark 1.3 and Qwen3.5-Flash
BenchmarkMuse Spark 1.3Qwen3.5-FlashLeader
AIMENot measured92.5%Only Qwen3.5-Flash measured
OTIS Mock AIME99.2%84.4%Muse Spark 1.3
FrontierMath, tiers 1 to 374.4%18.2%Muse Spark 1.3
FrontierMath, tier 446.3%Not measuredOnly Muse Spark 1.3 measured
ProofBench58.0%Not measuredOnly Muse Spark 1.3 measured
LMArena Text: math14971407Muse Spark 1.3
LMArena Text: mathematical work14911413Muse Spark 1.3
Neither model has a result on the other 6 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index40
Knowledge benchmarks for Muse Spark 1.3 and Qwen3.5-Flash
BenchmarkMuse Spark 1.3Qwen3.5-FlashLeader
MMLU ProNot measured84.1%Only Qwen3.5-Flash measured
LegalBench (Vals AI)Not measured84.3%Only Qwen3.5-Flash measured
CaseLaw (Vals AI)Not measured56.0%Only Qwen3.5-Flash measured
CorpFin (Vals AI)Not measured63.6%Only Qwen3.5-Flash measured
TaxEval (Vals AI)Not measured72.2%Only Qwen3.5-Flash measured
MortgageTax (Vals AI)Not measured67.4%Only Qwen3.5-Flash measured
MedCode (Vals AI)Not measured33.0%Only Qwen3.5-Flash measured
SimpleQA VerifiedNot measured20.3%Only Qwen3.5-Flash measured
LMArena Text: science15071415Muse Spark 1.3
LMArena Text: medicine and healthcare14931407Muse Spark 1.3
LMArena Text: legal and government14991398Muse Spark 1.3
LMArena Text: business and finance14901394Muse Spark 1.3
Neither model has a result on the other 5 boards here
Web designDirectional onlyPublic boards, shown as published, kept out of the index9 boards, none shared
Web design benchmarks for Muse Spark 1.3 and Qwen3.5-Flash
BenchmarkMuse Spark 1.3Qwen3.5-FlashLeader
Design Arena: websites1356Not measuredOnly Muse Spark 1.3 measured
Design Arena: UI components1352Not measuredOnly Muse Spark 1.3 measured
Design Arena: game dev1329Not measuredOnly Muse Spark 1.3 measured
Design Arena: data viz1343Not measuredOnly Muse Spark 1.3 measured
Design Arena: 3D1359Not measuredOnly Muse Spark 1.3 measured
Design Arena: all code categories1353Not measuredOnly Muse Spark 1.3 measured
Design Arena: SVG1300Not measuredOnly Muse Spark 1.3 measured
Design Arena: ASCII art1280Not measuredOnly Muse Spark 1.3 measured
LiveBench design74.8%Not measuredOnly Muse Spark 1.3 measured
GeneralLike-for-likePublic boards, shown as published, kept out of the index190
General benchmarks for Muse Spark 1.3 and Qwen3.5-Flash
BenchmarkMuse Spark 1.3Qwen3.5-FlashLeader
LiveBench data analysis79.6%Not measuredOnly Muse Spark 1.3 measured
SAGE (Vals AI)Not measured42.5%Only Qwen3.5-Flash measured
MedScribe (Vals AI)Not measured70.6%Only Qwen3.5-Flash measured
Long context reasoning (AA-LCR)83.0%Not measuredOnly Muse Spark 1.3 measured
DTBench96.5%82.9%Muse Spark 1.3
LMCA53.9%29.1%Muse Spark 1.3
LMArena Text14901397Muse Spark 1.3
LMArena Text: instruction following14791374Muse Spark 1.3
LMArena Text: creative writing14621343Muse Spark 1.3
LMArena Vision1308Not measuredOnly Muse Spark 1.3 measured
LMArena Text: English14951404Muse Spark 1.3
LMArena Text: non-English14811385Muse Spark 1.3
LMArena Text: Chinese15321445Muse Spark 1.3
LMArena Text: German15131390Muse Spark 1.3
LMArena Text: Japanese14701369Muse Spark 1.3
LMArena Text: Korean14901344Muse Spark 1.3
LMArena Text: French15111413Muse Spark 1.3
LMArena Text: Spanish14961400Muse Spark 1.3
LMArena Text: Russian14911380Muse Spark 1.3
LMArena Text: Polish14901376Muse Spark 1.3
LMArena Text: multi-turn14871393Muse Spark 1.3
LMArena Text: longer queries14881392Muse Spark 1.3
LMArena Text: writing and language14701369Muse Spark 1.3
LMArena Text: entertainment and media14571347Muse Spark 1.3
LMArena Vision: English1298Not measuredOnly Muse Spark 1.3 measured
LMArena Vision: Chinese1384Not measuredOnly Muse Spark 1.3 measured
LMArena Vision: reading text1319Not measuredOnly Muse Spark 1.3 measured
LMArena Vision: humor1293Not measuredOnly Muse Spark 1.3 measured
LMArena Vision: creative writing1296Not measuredOnly Muse Spark 1.3 measured
Neither model has a result on the other 17 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for Muse Spark 1.3 and Qwen3.5-Flash
BenchmarkMuse Spark 1.3Qwen3.5-FlashLeader
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 1.3$0.0034Fits in one request
Qwen3.5-Flash$0.0002Fits in one request

Qwen3.5-Flash costs less

Repository review

50K input + 3K output tokens

Muse Spark 1.3$0.075Fits in one request
Qwen3.5-Flash$0.0040Fits in one request

Qwen3.5-Flash costs less

Agent loop

200K input + 10K output tokens

Muse Spark 1.3$0.292Fits in one request
Qwen3.5-Flash$0.016Fits in one request

Qwen3.5-Flash 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 Muse Spark 1.3 and Qwen3.5-Flash
SpecificationMeta Muse Spark 1.3Qwen3.5-Flash
MakerMetaQwen
WeightsNo public weights listedNo public weights listed
ReleasedSeptember 2, 2026February 25, 2026
Context window1.05M1M
Input $/Mtok$1.25$0.065
Output $/Mtok$4.25$0.26
Coding index79.76.2
Independent measurements behind it21
Cost per solved taskNot computable$0.40
SourceOpenRouter listingOpenRouter listing

Questions

Is Muse Spark 1.3 better than Qwen3.5-Flash for coding?

Pick Muse Spark 1.3 for coding: it scores 79.7 on the Vibe Coding Index against 6.2 for Qwen3.5-Flash. Pick Qwen3.5-Flash when output tokens cost 16.3x less.

Which is cheaper, Muse Spark 1.3 or Qwen3.5-Flash?

Muse Spark 1.3 costs $1.25 per million input tokens and $4.25 per million output tokens; Qwen3.5-Flash costs $0.065 and $0.26. Cost per solved task is known for Qwen3.5-Flash only.

Which has the bigger context window, Muse Spark 1.3 or Qwen3.5-Flash?

Muse Spark 1.3, with 1.05M tokens against 1M.

How many benchmarks is the Muse Spark 1.3 vs Qwen3.5-Flash comparison based on?

39 benchmarks have a result for both models as of October 21, 2026. Muse Spark 1.3's coding index rests on 2 independent benchmarks and Qwen3.5-Flash's on 1. Where only one model has a result, the page says so instead of naming a winner.

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