Muse Spark 1.1 vs Qwen3.5 Plus 2026-04-20
Muse Spark 1.1 leads Qwen3.5 Plus 2026-04-20 on coding, 70.3 to 39.5 on the Vibe Coding Index, and Qwen3.5 Plus 2026-04-20 costs 2.4x less per output token ($1.80 vs $4.25 per million). Updated October 22, 2026; 16 benchmarks have a result for both.
Muse Spark 1.1 or Qwen3.5 Plus 2026-04-20: which to pick
Pick Muse Spark 1.1 for coding: it scores 70.3 on the Vibe Coding Index against 39.5 for Qwen3.5 Plus 2026-04-20.
Pick Qwen3.5 Plus 2026-04-20 for output tokens 2.4x cheaper ($1.80 vs $4.25 per million) and work measured by LegalBench (Vals AI), where it leads.
- Shared results
- 16
- Muse Spark 1.1 only
- 88
- Qwen3.5 Plus 2026-04-20 only
- 9
- Like-for-like categories
- 6 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.
Coding
Vibe Coding Index, six public coding benchmarks
Muse Spark 1.1
Muse Spark 1.1 scores 70.3 against 39.5.
3 and 2 benchmarks behind the scores
Intelligence
AA Intelligence Index
No call
Only Muse Spark 1.1 has a AA Intelligence Index result, 33.7.
Directional only
Agentic work
AA Agentic Index
No call
Only Muse Spark 1.1 has a AA Agentic Index result, 25.8.
Directional only
Reasoning
GPQA Diamond
Muse Spark 1.1
Muse Spark 1.1 leads, 91.2% against 87.4%.
Same board, both measured
Math
AIME
No call
Only Qwen3.5 Plus 2026-04-20 has a AIME result, 86.0%.
Directional only
Knowledge
MMLU Pro
Muse Spark 1.1
Muse Spark 1.1 leads, 88.7% against 87.2%.
Same board, both measured
Web design
Design Arena: websites
No call
Only Muse Spark 1.1 has a Design Arena: websites result, 1270.
Directional only
Long documents
Listed context window
Muse Spark 1.1
Muse Spark 1.1 takes 1.05M tokens against 1M.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Qwen3.5 Plus 2026-04-20
Muse Spark 1.1 $0.0034, Qwen3.5 Plus 2026-04-20 $0.0012 per turn.
List prices
Cost per solved task
One SWE-bench Verified task, solved
Muse Spark 1.1
Muse Spark 1.1 $0.43, Qwen3.5 Plus 2026-04-20 $1.35.
Published attempt cost and pass rate
At a glance
- Coding index
- Muse Spark 1.1 70.3 from 3 benchmarks, Qwen3.5 Plus 2026-04-20 39.5 from 2 benchmarks.
- Widest category
- Agentic work, 40.7 points apart on average over 1 shared benchmark.
- Widest single gap
- MMMU Pro (Vals AI): Muse Spark 1.1 86.6% against Qwen3.5 Plus 2026-04-20 22.8%, 63.8 points apart on a 0 to 100 scale.
- Output price
- Muse Spark 1.1 $4.25 against Qwen3.5 Plus 2026-04-20 $1.80 per million output tokens, 2.4x apart.
- Context window
- Muse Spark 1.1 takes 1.05M tokens, Qwen3.5 Plus 2026-04-20 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.
| Category | Muse Spark 1.1 | Bars | Qwen3.5 Plus 2026-04-20 | Ties |
|---|---|---|---|---|
| Coding | 3 | 0 | ||
| Intelligence | 1 | 0 | ||
| Agentic work | 1 | 0 | ||
| Reasoning | 3 | 0 | ||
| Knowledge | 4 | 1 | ||
| General | 3 | 0 | ||
| All shared boards | 15 | 1 |
CodingLike-for-likeSix of these boards feed the Vibe Coding Index30
| Benchmark | Muse Spark 1.1 | Qwen3.5 Plus 2026-04-20 | Leader |
|---|---|---|---|
| LMArena WebDev | 1542 | Not measured | Only Muse Spark 1.1 measured |
| AA Coding Index | 71.3 | Not measured | Only Muse Spark 1.1 measured |
| LiveCodeBench (Vals AI) | 85.9% | 85.3% | Muse Spark 1.1 |
| SWE-bench Verified (Vals AI) | 82.0% | 71.2% | Muse Spark 1.1 |
| Vibe Code Bench (Vals AI) | 72.2% | 15.7% | Muse Spark 1.1 |
| Code migration (Vals AI) | 31.1% | Not measured | Only Muse Spark 1.1 measured |
| ProgramBench (Vals AI) | 0.0% | Not measured | Only Muse Spark 1.1 measured |
| Terminal-Bench 2.1 (Vals AI) | 69.3% | Not measured | Only Muse Spark 1.1 measured |
| SkillsBench (Vals AI) | 59.2% | Not measured | Only Muse Spark 1.1 measured |
| SciCode | 58.8% | Not measured | Only Muse Spark 1.1 measured |
| ALE-Bench | Not measured | 608.9 | Only Qwen3.5 Plus 2026-04-20 measured |
| LMArena Text: coding | 1498 | Not measured | Only Muse Spark 1.1 measured |
| LMArena Text: software and IT | 1498 | Not measured | Only Muse Spark 1.1 measured |
| LMArena WebDev: React | 1532 | Not measured | Only Muse Spark 1.1 measured |
| LMArena WebDev: HTML | 1540 | Not measured | Only Muse Spark 1.1 measured |
| LMArena WebDev: from an image | 1540 | Not measured | Only Muse Spark 1.1 measured |
| SWE Atlas: Codebase QnA | 42.2% | Not measured | Only Muse Spark 1.1 measured |
| SWE Atlas: Test Writing | 41.5% | Not measured | Only Muse Spark 1.1 measured |
| Neither model has a result on the other 25 boards here | |||
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index10
| Benchmark | Muse Spark 1.1 | Qwen3.5 Plus 2026-04-20 | Leader |
|---|---|---|---|
| AA Intelligence Index | 33.7 | Not measured | Only Muse Spark 1.1 measured |
| Epoch Capabilities Index | 154.1 | 146.2 | Muse Spark 1.1 |
Agentic workLike-for-likePublic boards, shown as published, kept out of the index10
| Benchmark | Muse Spark 1.1 | Qwen3.5 Plus 2026-04-20 | Leader |
|---|---|---|---|
| AA Agentic Index | 25.8 | Not measured | Only Muse Spark 1.1 measured |
| Design Arena: agents building web apps | 1207 | Not measured | Only Muse Spark 1.1 measured |
| Design Arena: agents building full-stack apps | 1199 | Not measured | Only Muse Spark 1.1 measured |
| Design Arena: agents building mobile apps | 1175 | Not measured | Only Muse Spark 1.1 measured |
| Design Arena: agents building Android apps | 1178 | Not measured | Only Muse Spark 1.1 measured |
| Design Arena: agents building Godot games | 1103 | Not measured | Only Muse Spark 1.1 measured |
| Design Arena: agents building games | 1183 | Not measured | Only Muse Spark 1.1 measured |
| Design Arena: HTML slides | 1145 | Not measured | Only Muse Spark 1.1 measured |
| Design Arena: PowerPoint slides | 1134 | Not measured | Only Muse Spark 1.1 measured |
| Design Arena: spreadsheets | 1021 | Not measured | Only Muse Spark 1.1 measured |
| Finance Agent (Vals AI) | 57.2% | Not measured | Only Muse Spark 1.1 measured |
| Legal Research Bench (Vals AI) | 38.0% | Not measured | Only Muse Spark 1.1 measured |
| Excel Modeling Benchmark (Vals AI) | 56.4% | Not measured | Only Muse Spark 1.1 measured |
| Time Horizon Index (Vals AI) | 1.7% | Not measured | Only Muse Spark 1.1 measured |
| APEX-Agents | 31.8% | Not measured | Only Muse Spark 1.1 measured |
| Vending-Bench 2 | $6,520 | $1 | Muse Spark 1.1 |
| MCP Atlas | 88.1% | Not measured | Only Muse Spark 1.1 measured |
| Neither model has a result on the other 25 boards here | |||
ReasoningLike-for-likePublic boards, shown as published, kept out of the index30
| Benchmark | Muse Spark 1.1 | Qwen3.5 Plus 2026-04-20 | Leader |
|---|---|---|---|
| GPQA Diamond | 91.2% | 87.4% | Muse Spark 1.1 |
| MMMU Pro (Vals AI) | 86.6% | 22.8% | Muse Spark 1.1 |
| GPQA Diamond (Artificial Analysis run) | 89.8% | Not measured | Only Muse Spark 1.1 measured |
| Humanity's Last Exam (Artificial Analysis run) | 46.2% | Not measured | Only Muse Spark 1.1 measured |
| GPQA Diamond (Epoch AI run) | Not measured | 84.8% | Only Qwen3.5 Plus 2026-04-20 measured |
| Chess puzzles | 34.0% | 8.0% | Muse Spark 1.1 |
| Mystery game puzzles | Not measured | 17.0% | Only Qwen3.5 Plus 2026-04-20 measured |
| LMArena Text: hard prompts | 1485 | Not measured | Only Muse Spark 1.1 measured |
| LMArena Text: expert | 1478 | Not measured | Only Muse Spark 1.1 measured |
| LMArena Text: hard prompts in English | 1480 | Not measured | Only Muse Spark 1.1 measured |
| LMArena Vision: diagrams | 1305 | Not measured | Only Muse Spark 1.1 measured |
| LMArena Vision: homework | 1287 | Not measured | Only Muse Spark 1.1 measured |
| Neither model has a result on the other 11 boards here | |||
MathDirectional onlyPublic boards, shown as published, kept out of the index6 boards, none shared
| Benchmark | Muse Spark 1.1 | Qwen3.5 Plus 2026-04-20 | Leader |
|---|---|---|---|
| AIME | Not measured | 86.0% | Only Qwen3.5 Plus 2026-04-20 measured |
| OTIS Mock AIME | Not measured | 86.7% | Only Qwen3.5 Plus 2026-04-20 measured |
| ProofBench | 39.0% | Not measured | Only Muse Spark 1.1 measured |
| LMArena Text: math | 1482 | Not measured | Only Muse Spark 1.1 measured |
| LMArena Text: mathematical work | 1487 | Not measured | Only Muse Spark 1.1 measured |
| MathArena | 42.5% | Not measured | Only Muse Spark 1.1 measured |
| Neither model has a result on the other 8 boards here | |||
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index41
| Benchmark | Muse Spark 1.1 | Qwen3.5 Plus 2026-04-20 | Leader |
|---|---|---|---|
| MMLU Pro | 88.7% | 87.2% | Muse Spark 1.1 |
| LegalBench (Vals AI) | 85.0% | 85.1% | Qwen3.5 Plus 2026-04-20 |
| CaseLaw (Vals AI) | Not measured | 59.7% | Only Qwen3.5 Plus 2026-04-20 measured |
| CorpFin (Vals AI) | 71.3% | 65.3% | Muse Spark 1.1 |
| TaxEval (Vals AI) | 79.7% | Not measured | Only Muse Spark 1.1 measured |
| MortgageTax (Vals AI) | 66.1% | 60.8% | Muse Spark 1.1 |
| MedQA (Vals AI) | Not measured | 95.2% | Only Qwen3.5 Plus 2026-04-20 measured |
| SimpleQA Verified | 57.8% | 25.4% | Muse Spark 1.1 |
| LMArena Text: science | 1484 | Not measured | Only Muse Spark 1.1 measured |
| LMArena Text: medicine and healthcare | 1479 | Not measured | Only Muse Spark 1.1 measured |
| LMArena Text: legal and government | 1481 | Not measured | Only Muse Spark 1.1 measured |
| LMArena Text: business and finance | 1470 | Not measured | Only Muse Spark 1.1 measured |
| PRBench Finance | 55.0% | Not measured | Only Muse Spark 1.1 measured |
| PRBench Legal | 57.0% | Not measured | Only Muse Spark 1.1 measured |
| Neither model has a result on the other 6 boards here | |||
Web designDirectional onlyPublic boards, shown as published, kept out of the index8 boards, none shared
| Benchmark | Muse Spark 1.1 | Qwen3.5 Plus 2026-04-20 | Leader |
|---|---|---|---|
| Design Arena: websites | 1270 | Not measured | Only Muse Spark 1.1 measured |
| Design Arena: UI components | 1287 | Not measured | Only Muse Spark 1.1 measured |
| Design Arena: game dev | 1269 | Not measured | Only Muse Spark 1.1 measured |
| Design Arena: data viz | 1267 | Not measured | Only Muse Spark 1.1 measured |
| Design Arena: 3D | 1259 | Not measured | Only Muse Spark 1.1 measured |
| Design Arena: all code categories | 1276 | Not measured | Only Muse Spark 1.1 measured |
| Design Arena: SVG | 1234 | Not measured | Only Muse Spark 1.1 measured |
| Design Arena: ASCII art | 1269 | Not measured | Only Muse Spark 1.1 measured |
| Neither model has a result on the other 1 board here | |||
GeneralLike-for-likePublic boards, shown as published, kept out of the index30
| Benchmark | Muse Spark 1.1 | Qwen3.5 Plus 2026-04-20 | Leader |
|---|---|---|---|
| Public Benefits Bench (Vals AI) | 61.3% | Not measured | Only Muse Spark 1.1 measured |
| SAGE (Vals AI) | 45.6% | 30.4% | Muse Spark 1.1 |
| MedScribe (Vals AI) | 88.9% | Not measured | Only Muse Spark 1.1 measured |
| Vals Multimodal Index | 66.7% | Not measured | Only Muse Spark 1.1 measured |
| Long context reasoning (AA-LCR) | 77.7% | Not measured | Only Muse Spark 1.1 measured |
| DTBench | 94.4% | 80.5% | Muse Spark 1.1 |
| LMCA | 49.9% | 36.4% | Muse Spark 1.1 |
| CL-bench | Not measured | 19.8% | Only Qwen3.5 Plus 2026-04-20 measured |
| Surface Evolver Bench | 52.5% | Not measured | Only Muse Spark 1.1 measured |
| CL-bench Life | Not measured | 12.4% | Only Qwen3.5 Plus 2026-04-20 measured |
| LMArena Text | 1478 | Not measured | Only Muse Spark 1.1 measured |
| LMArena Text: instruction following | 1457 | Not measured | Only Muse Spark 1.1 measured |
| LMArena Text: creative writing | 1435 | Not measured | Only Muse Spark 1.1 measured |
| LMArena Vision | 1293 | Not measured | Only Muse Spark 1.1 measured |
| LMArena Text: English | 1478 | Not measured | Only Muse Spark 1.1 measured |
| LMArena Text: non-English | 1471 | Not measured | Only Muse Spark 1.1 measured |
| LMArena Text: Chinese | 1515 | Not measured | Only Muse Spark 1.1 measured |
| LMArena Text: German | 1469 | Not measured | Only Muse Spark 1.1 measured |
| LMArena Text: Japanese | 1450 | Not measured | Only Muse Spark 1.1 measured |
| LMArena Text: Korean | 1459 | Not measured | Only Muse Spark 1.1 measured |
| LMArena Text: French | 1492 | Not measured | Only Muse Spark 1.1 measured |
| LMArena Text: Spanish | 1464 | Not measured | Only Muse Spark 1.1 measured |
| LMArena Text: Russian | 1482 | Not measured | Only Muse Spark 1.1 measured |
| LMArena Text: Polish | 1499 | Not measured | Only Muse Spark 1.1 measured |
| LMArena Text: multi-turn | 1484 | Not measured | Only Muse Spark 1.1 measured |
| LMArena Text: longer queries | 1462 | Not measured | Only Muse Spark 1.1 measured |
| LMArena Text: writing and language | 1448 | Not measured | Only Muse Spark 1.1 measured |
| LMArena Text: entertainment and media | 1438 | Not measured | Only Muse Spark 1.1 measured |
| LMArena Vision: English | 1292 | Not measured | Only Muse Spark 1.1 measured |
| LMArena Vision: Chinese | 1348 | Not measured | Only Muse Spark 1.1 measured |
| LMArena Vision: reading text | 1301 | Not measured | Only Muse Spark 1.1 measured |
| LMArena Vision: humor | 1288 | Not measured | Only Muse Spark 1.1 measured |
| LMArena Vision: creative writing | 1253 | Not measured | Only Muse Spark 1.1 measured |
| LMArena Document | 1465 | Not measured | Only Muse Spark 1.1 measured |
| MultiChallenge | 75.3% | Not measured | Only Muse Spark 1.1 measured |
| EQ-Bench 4 | 1260 | Not measured | Only Muse Spark 1.1 measured |
| Neither model has a result on the other 12 boards here | |||
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Muse Spark 1.1 | Qwen3.5 Plus 2026-04-20 | Leader |
|---|---|---|---|
| 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
Qwen3.5 Plus 2026-04-20 costs less
Repository review
50K input + 3K output tokens
Qwen3.5 Plus 2026-04-20 costs less
Agent loop
200K input + 10K output tokens
Qwen3.5 Plus 2026-04-20 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.
| Specification | Meta Muse Spark 1.1 | Qwen3.5 Plus 2026-04-20 |
|---|---|---|
| Maker | Meta | Qwen |
| Weights | No public weights listed | No public weights listed |
| Released | July 16, 2026 | April 27, 2026 |
| Context window | 1.05M | 1M |
| Input $/Mtok | $1.25 | $0.30 |
| Output $/Mtok | $4.25 | $1.80 |
| Coding index | 70.3 | 39.5 |
| Independent measurements behind it | 3 | 2 |
| Cost per solved task | $0.43 | $1.35 |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Muse Spark 1.1 better than Qwen3.5 Plus 2026-04-20 for coding?
Pick Muse Spark 1.1 for coding: it scores 70.3 on the Vibe Coding Index against 39.5 for Qwen3.5 Plus 2026-04-20. Pick Qwen3.5 Plus 2026-04-20 for output tokens 2.4x cheaper ($1.80 vs $4.25 per million) and work measured by LegalBench (Vals AI), where it leads.
Which is cheaper, Muse Spark 1.1 or Qwen3.5 Plus 2026-04-20?
Muse Spark 1.1 costs $1.25 per million input tokens and $4.25 per million output tokens; Qwen3.5 Plus 2026-04-20 costs $0.30 and $1.80. Per solved SWE-bench Verified task, Muse Spark 1.1 costs $0.43 and Qwen3.5 Plus 2026-04-20 $1.35.
Which has the bigger context window, Muse Spark 1.1 or Qwen3.5 Plus 2026-04-20?
Muse Spark 1.1, with 1.05M tokens against 1M.
How many benchmarks is the Muse Spark 1.1 vs Qwen3.5 Plus 2026-04-20 comparison based on?
16 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 Qwen3.5 Plus 2026-04-20's on 2. Where only one model has a result, the page says so instead of naming a winner.