Muse Spark 1.3 vs Inkling
Updated October 21, 2026. 76 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.
Decision reading
Pick Muse Spark 1.3 for coding: it scores 79.7 on the Vibe Coding Index against 49.7 for Inkling.
Pick Inkling when output tokens cost 1.0x less.
- Shared results
- 76
- Muse Spark 1.3 only
- 16
- Inkling only
- 26
- Like-for-like categories
- 8 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.
Coding
Vibe Coding Index, four public coding benchmarks
Muse Spark 1.3
Muse Spark 1.3 scores 79.7 against 49.7.
2 benchmarks behind each score
Intelligence
AA Intelligence Index
Muse Spark 1.3
Muse Spark 1.3 leads, 48.1 against 25.0.
Same board, both measured
Agentic work
AA Agentic Index
Muse Spark 1.3
Muse Spark 1.3 leads, 55.5 against 22.5.
Same board, both measured
Reasoning
GPQA Diamond
No call
Only Inkling has a GPQA Diamond result, 87.1%.
Directional only
Knowledge
MMLU Pro
No call
Only Inkling has a MMLU Pro result, 86.3%.
Directional only
Web design
Design Arena: websites
Muse Spark 1.3
Muse Spark 1.3 leads, 1356 against 1224.
Same board, both measured
General
Vals Index
No call
Only Inkling has a Vals Index result, 29.0%.
Directional only
Long documents
Listed context window
Muse Spark 1.3
Muse Spark 1.3 takes 1.05M tokens against 524K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Inkling
Muse Spark 1.3 $0.0034, Inkling $0.0030 per turn.
List prices
Cost per solved task
One SWE-bench Verified task, solved
No call
Only Inkling has the number, $0.76.
Directional only
At a glance
- Coding index
- Muse Spark 1.3 79.7 from 2 benchmarks, Inkling 49.7 from 2 benchmarks.
- Widest category
- Math, 26.5 points apart on average over 6 shared benchmarks.
- Widest single gap
- LiveBench browser: Muse Spark 1.3 80.0% against Inkling 16.0%, 64.0 points apart on a 0 to 100 scale.
- Output price
- Muse Spark 1.3 $4.25 against Inkling $4.05 per million output tokens, 1.0x apart.
- Context window
- Muse Spark 1.3 takes 1.05M tokens, Inkling 524K.
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 1.3 | Bars | Inkling | Ties |
|---|---|---|---|---|
| Coding | 17 | 0 | ||
| Intelligence | 2 | 0 | ||
| Agentic work | 10 | 0 | ||
| Reasoning | 7 | 0 | ||
| Math | 6 | 0 | ||
| Knowledge | 4 | 0 | ||
| Web design | 9 | 0 | ||
| General | 21 | 0 | ||
| All shared boards | 76 | 0 |
CodingLike-for-likeFour of these boards feed the Vibe Coding Index170
| Benchmark | Muse Spark 1.3 | Inkling | Leader |
|---|---|---|---|
| LiveBench coding | 90.2% | 64.0% | Muse Spark 1.3 |
| LMArena WebDev | 1659 | 1414 | Muse Spark 1.3 |
| AA Coding Index | 75.8 | 52.1 | Muse Spark 1.3 |
| LiveCodeBench (Vals AI) | Not measured | 85.5% | Only Inkling measured |
| SWE-bench Verified (Vals AI) | Not measured | 77.6% | Only Inkling measured |
| Terminal-Bench 4 (Vals AI) | 10.6% | 0.5% | Muse Spark 1.3 |
| Vibe Code Bench (Vals AI) | 82.9% | 19.2% | Muse Spark 1.3 |
| Code migration (Vals AI) | 27.6% | 11.8% | Muse Spark 1.3 |
| ProgramBench (Vals AI) | 0.5% | 0.0% | Muse Spark 1.3 |
| IOI (Vals AI) | 43.9% | 14.9% | Muse Spark 1.3 |
| Terminal-Bench 2.1 (Vals AI) | 72.3% | 47.6% | Muse Spark 1.3 |
| Vibe Code Bench 1-100 (Vals AI) | Not measured | 7.3% | Only Inkling measured |
| SkillsBench (Vals AI) | Not measured | 26.1% | Only Inkling measured |
| CyberBench (Vals AI) | 69.4% | 66.8% | Muse Spark 1.3 |
| SciCode | 59.7% | 47.0% | Muse Spark 1.3 |
| FrontierCode | Not measured | 14.0% | Only Inkling measured |
| FrontierSWE | 25.8% | 4.1% | Muse Spark 1.3 |
| WeirdML | Not measured | 32.3% | Only Inkling measured |
| ALE-Bench | 1688.3 | 946.0 | Muse Spark 1.3 |
| LMArena Text: coding | 1510 | 1466 | Muse Spark 1.3 |
| LMArena Text: software and IT | 1511 | 1465 | Muse Spark 1.3 |
| LMArena WebDev: React | 1672 | 1404 | Muse Spark 1.3 |
| LMArena WebDev: HTML | 1653 | 1399 | Muse Spark 1.3 |
| LMArena WebDev: from an image | 1640 | Not measured | Only Muse Spark 1.3 measured |
| Neither model has a result on the other 14 boards here | |||
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
| Benchmark | Muse Spark 1.3 | Inkling | Leader |
|---|---|---|---|
| AA Intelligence Index | 48.1 | 25.0 | Muse Spark 1.3 |
| Epoch Capabilities Index | 157.2 | 148.4 | Muse Spark 1.3 |
Agentic workLike-for-likePublic boards, shown as published, kept out of the index100
| Benchmark | Muse Spark 1.3 | Inkling | Leader |
|---|---|---|---|
| AA Agentic Index | 55.5 | 22.5 | Muse Spark 1.3 |
| Design Arena: agents building web apps | 1297 | 1196 | Muse Spark 1.3 |
| Design Arena: agents building full-stack apps | 1295 | Not measured | Only Muse Spark 1.3 measured |
| Design Arena: agents building mobile apps | 1217 | Not measured | Only Muse Spark 1.3 measured |
| Design Arena: agents building Godot games | 1241 | Not measured | Only Muse Spark 1.3 measured |
| Design Arena: PowerPoint slides | 1244 | Not measured | Only Muse Spark 1.3 measured |
| Design Arena: spreadsheets | 1048 | Not measured | Only Muse Spark 1.3 measured |
| LiveBench research | 68.6% | 59.9% | Muse Spark 1.3 |
| LiveBench browser | 80.0% | 16.0% | Muse Spark 1.3 |
| LiveBench long agentic | 40.4% | 14.1% | Muse Spark 1.3 |
| SREBench (Vals AI) | Not measured | 0.0% | Only Inkling measured |
| Finance Agent (Vals AI) | 58.9% | 46.6% | Muse Spark 1.3 |
| Tax Agent Bench (Vals AI) | 36.0% | 15.3% | Muse Spark 1.3 |
| Legal Research Bench (Vals AI) | 40.9% | 28.4% | Muse Spark 1.3 |
| Harvey's Legal Agent Benchmark (Vals AI) | Not measured | 3.8% | Only Inkling measured |
| Excel Modeling Benchmark (Vals AI) | 62.7% | 38.4% | Muse Spark 1.3 |
| Terminal-Bench-Science (Vals AI) | 4.3% | Not measured | Only Muse Spark 1.3 measured |
| APEX-Agents | 58.6% | 33.8% | Muse Spark 1.3 |
| Neither model has a result on the other 21 boards here | |||
ReasoningLike-for-likePublic boards, shown as published, kept out of the index70
| Benchmark | Muse Spark 1.3 | Inkling | Leader |
|---|---|---|---|
| GPQA Diamond | Not measured | 87.1% | Only Inkling measured |
| LiveBench reasoning | 89.7% | 78.3% | Muse Spark 1.3 |
| MMMU Pro (Vals AI) | Not measured | 78.5% | Only Inkling measured |
| GPQA Diamond (Artificial Analysis run) | 94.1% | 87.2% | Muse Spark 1.3 |
| Humanity's Last Exam (Artificial Analysis run) | 48.7% | 31.9% | Muse Spark 1.3 |
| GPQA Diamond (Epoch AI run) | Not measured | 88.3% | Only Inkling measured |
| ARC-AGI | Not measured | 79.5% | Only Inkling measured |
| ARC-AGI-2 | Not measured | 36.5% | Only Inkling measured |
| SimpleBench | Not measured | 50.0% | Only Inkling measured |
| Chess puzzles | 37.0% | 21.0% | Muse Spark 1.3 |
| Mystery game puzzles | 25.0% | Not measured | Only Muse Spark 1.3 measured |
| LMArena Text: hard prompts | 1503 | 1451 | Muse Spark 1.3 |
| LMArena Text: expert | 1519 | 1466 | Muse Spark 1.3 |
| LMArena Text: hard prompts in English | 1500 | 1448 | Muse Spark 1.3 |
| LMArena Vision: diagrams | 1330 | Not measured | Only Muse Spark 1.3 measured |
| LMArena Vision: homework | 1296 | Not measured | Only Muse Spark 1.3 measured |
| Neither model has a result on the other 5 boards here | |||
MathLike-for-likePublic boards, shown as published, kept out of the index60
| Benchmark | Muse Spark 1.3 | Inkling | Leader |
|---|---|---|---|
| OTIS Mock AIME | 99.2% | 88.9% | Muse Spark 1.3 |
| FrontierMath, tiers 1 to 3 | 74.4% | 33.3% | Muse Spark 1.3 |
| FrontierMath, tier 4 | 46.3% | 4.9% | Muse Spark 1.3 |
| ProofBench | 58.0% | 0.0% | Muse Spark 1.3 |
| LMArena Text: math | 1497 | 1479 | Muse Spark 1.3 |
| LMArena Text: mathematical work | 1491 | 1460 | 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 index40
| Benchmark | Muse Spark 1.3 | Inkling | Leader |
|---|---|---|---|
| MMLU Pro | Not measured | 86.3% | Only Inkling measured |
| LegalBench (Vals AI) | Not measured | 83.0% | Only Inkling measured |
| CorpFin (Vals AI) | Not measured | 68.6% | Only Inkling measured |
| TaxEval (Vals AI) | Not measured | 75.3% | Only Inkling measured |
| MortgageTax (Vals AI) | Not measured | 64.0% | Only Inkling measured |
| MedCode (Vals AI) | Not measured | 41.2% | Only Inkling measured |
| SimpleQA Verified | Not measured | 40.3% | Only Inkling measured |
| LMArena Text: science | 1507 | 1455 | Muse Spark 1.3 |
| LMArena Text: medicine and healthcare | 1493 | 1447 | Muse Spark 1.3 |
| LMArena Text: legal and government | 1499 | 1448 | Muse Spark 1.3 |
| LMArena Text: business and finance | 1490 | 1438 | Muse Spark 1.3 |
| Neither model has a result on the other 6 boards here | |||
Web designLike-for-likePublic boards, shown as published, kept out of the index90
| Benchmark | Muse Spark 1.3 | Inkling | Leader |
|---|---|---|---|
| Design Arena: websites | 1356 | 1224 | Muse Spark 1.3 |
| Design Arena: UI components | 1352 | 1200 | Muse Spark 1.3 |
| Design Arena: game dev | 1329 | 1166 | Muse Spark 1.3 |
| Design Arena: data viz | 1343 | 1160 | Muse Spark 1.3 |
| Design Arena: 3D | 1359 | 1161 | Muse Spark 1.3 |
| Design Arena: all code categories | 1353 | 1206 | Muse Spark 1.3 |
| Design Arena: SVG | 1300 | 1109 | Muse Spark 1.3 |
| Design Arena: ASCII art | 1280 | 1089 | Muse Spark 1.3 |
| LiveBench design | 74.8% | 58.3% | Muse Spark 1.3 |
GeneralLike-for-likePublic boards, shown as published, kept out of the index210
| Benchmark | Muse Spark 1.3 | Inkling | Leader |
|---|---|---|---|
| Vals Index | Not measured | 29.0% | Only Inkling measured |
| LiveBench data analysis | 79.6% | 72.8% | Muse Spark 1.3 |
| Public Benefits Bench (Vals AI) | Not measured | 58.5% | Only Inkling measured |
| SAGE (Vals AI) | Not measured | 36.5% | Only Inkling measured |
| MedScribe (Vals AI) | Not measured | 85.4% | Only Inkling measured |
| Vals Multimodal Index | Not measured | 49.4% | Only Inkling measured |
| Long context reasoning (AA-LCR) | 83.0% | 77.3% | Muse Spark 1.3 |
| DTBench | 96.5% | 87.5% | Muse Spark 1.3 |
| LMCA | 53.9% | 37.6% | Muse Spark 1.3 |
| LMArena Text | 1490 | 1442 | Muse Spark 1.3 |
| LMArena Text: instruction following | 1479 | 1425 | Muse Spark 1.3 |
| LMArena Text: creative writing | 1462 | 1390 | Muse Spark 1.3 |
| LMArena Vision | 1308 | Not measured | Only Muse Spark 1.3 measured |
| LMArena Text: English | 1495 | 1442 | Muse Spark 1.3 |
| LMArena Text: non-English | 1481 | 1434 | Muse Spark 1.3 |
| LMArena Text: Chinese | 1532 | 1493 | Muse Spark 1.3 |
| LMArena Text: German | 1513 | 1445 | Muse Spark 1.3 |
| LMArena Text: Japanese | 1470 | 1429 | Muse Spark 1.3 |
| LMArena Text: Korean | 1490 | 1403 | Muse Spark 1.3 |
| LMArena Text: French | 1511 | 1455 | Muse Spark 1.3 |
| LMArena Text: Spanish | 1496 | 1449 | Muse Spark 1.3 |
| LMArena Text: Russian | 1491 | 1430 | Muse Spark 1.3 |
| LMArena Text: Polish | 1490 | 1450 | Muse Spark 1.3 |
| LMArena Text: multi-turn | 1487 | 1437 | Muse Spark 1.3 |
| LMArena Text: longer queries | 1488 | 1435 | Muse Spark 1.3 |
| LMArena Text: writing and language | 1470 | 1404 | Muse Spark 1.3 |
| LMArena Text: entertainment and media | 1457 | 1394 | Muse Spark 1.3 |
| LMArena Vision: English | 1298 | Not measured | Only Muse Spark 1.3 measured |
| LMArena Vision: Chinese | 1384 | Not measured | Only Muse Spark 1.3 measured |
| LMArena Vision: reading text | 1319 | Not measured | Only Muse Spark 1.3 measured |
| LMArena Vision: humor | 1293 | Not measured | Only Muse Spark 1.3 measured |
| LMArena Vision: creative writing | 1296 | Not measured | Only Muse Spark 1.3 measured |
| Neither model has a result on the other 14 boards here | |||
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Muse Spark 1.3 | Inkling | 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
Inkling costs less
Repository review
50K input + 3K output tokens
Inkling costs less
Agent loop
200K input + 10K output tokens
Inkling 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 1.3 | Thinking Machines Inkling |
|---|---|---|
| Maker | Meta | Thinking Machines |
| Weights | No public weights listed | Open weights |
| Released | September 2, 2026 | July 17, 2026 |
| Context window | 1.05M | 524K |
| Input $/Mtok | $1.25 | $1.00 |
| Output $/Mtok | $4.25 | $4.05 |
| Coding index | 79.7 | 49.7 |
| Independent measurements behind it | 2 | 2 |
| Cost per solved task | Not computable | $0.76 |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Muse Spark 1.3 better than Inkling for coding?
Pick Muse Spark 1.3 for coding: it scores 79.7 on the Vibe Coding Index against 49.7 for Inkling. Pick Inkling when output tokens cost 1.0x less.
Which is cheaper, Muse Spark 1.3 or Inkling?
Muse Spark 1.3 costs $1.25 per million input tokens and $4.25 per million output tokens; Inkling costs $1.00 and $4.05. Cost per solved task is known for Inkling only.
Which has the bigger context window, Muse Spark 1.3 or Inkling?
Muse Spark 1.3, with 1.05M tokens against 524K.
How many benchmarks is the Muse Spark 1.3 vs Inkling comparison based on?
76 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 Inkling's on 2. Where only one model has a result, the page says so instead of naming a winner.