Muse Spark Open vs Inkling 2 Small
Inkling 2 Small leads Muse Spark Open on coding, 48.9 to 43.4 on the Vibe Coding Index, and Inkling 2 Small costs 4.3x less per output token ($1.00 vs $4.25 per million). Updated November 14, 2026; 25 benchmarks have a result for both.
Muse Spark Open or Inkling 2 Small: which to pick
Pick Inkling 2 Small for coding: it scores 48.9 on the Vibe Coding Index against 43.4 for Muse Spark Open, though on 3 benchmarks against 4.
Pick Muse Spark Open for work measured by SciCode or Harvey's Legal Agent Benchmark (Vals AI), where it leads.
- Shared results
- 25
- Muse Spark Open only
- 22
- Inkling 2 Small only
- 26
- Like-for-like categories
- 7 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
Inkling 2 Small
Inkling 2 Small scores 48.9 against 43.4.
4 and 3 benchmarks behind the scores
Intelligence
AA Intelligence Index
Inkling 2 Small
Inkling 2 Small leads, 30.6 against 24.9.
Same board, both measured
Web design
Design Arena: websites
No call
Only Muse Spark Open has a Design Arena: websites result, 1306.
Directional only
General
Vals Index
Inkling 2 Small
Inkling 2 Small leads, 56.1% against 48.6%.
Same board, both measured
Long documents
Listed context window
No call
Both take 1.05M tokens.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Inkling 2 Small
Muse Spark Open $0.0034, Inkling 2 Small $0.0008 per turn.
List prices
At a glance
- Coding index
- Muse Spark Open 43.4 from 4 benchmarks, Inkling 2 Small 48.9 from 3 benchmarks.
- Widest category
- Math, 16.9 points apart on average over 1 shared benchmark.
- Widest single gap
- ARC-AGI-2: Muse Spark Open 57.5% against Inkling 2 Small 81.7%, 24.2 points apart on a 0 to 100 scale.
- Output price
- Muse Spark Open $4.25 against Inkling 2 Small $1.00 per million output tokens, 4.3x apart.
- 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.
| Category | Muse Spark Open | Bars | Inkling 2 Small | Ties |
|---|---|---|---|---|
| Coding | 1 | 8 | ||
| Intelligence | 0 | 1 | ||
| Agentic work | 1 | 3 | ||
| Reasoning | 0 | 5 | ||
| Math | 0 | 1 | ||
| Knowledge | 1 | 0 | ||
| General | 0 | 4 | ||
| All shared boards | 3 | 22 |
CodingLike-for-likeSix of these boards feed the Vibe Coding Index18
| Benchmark | Muse Spark Open | Inkling 2 Small | Leader |
|---|---|---|---|
| LiveBench coding | 55.1% | Not measured | Only Muse Spark Open measured |
| LMArena WebDev | 1526 | 1647 | Inkling 2 Small |
| Terminal-Bench 4 (Vals AI) | 6.6% | 12.6% | Inkling 2 Small |
| Vibe Code Bench (Vals AI) | 76.2% | 81.5% | Inkling 2 Small |
| Code migration (Vals AI) | 21.2% | Not measured | Only Muse Spark Open measured |
| ProgramBench (Vals AI) | Not measured | 0.5% | Only Inkling 2 Small measured |
| SWE-bench Multimodal (Vals AI) | Not measured | 43.1% | Only Inkling 2 Small measured |
| CyberBench (Vals AI) | Not measured | 72.7% | Only Inkling 2 Small measured |
| SciCode | 58.4% | 52.3% | Muse Spark Open |
| Terminal-Bench 4.0 (Artificial Analysis run) | 8.1% | 13.1% | Inkling 2 Small |
| FrontierCode 2.0 | 7.6% | 25.4% | Inkling 2 Small |
| ALE-Bench | 1590.1 | Not measured | Only Muse Spark Open measured |
| LMArena Text: coding | Not measured | 1455 | Only Inkling 2 Small measured |
| LMArena Text: software and IT | Not measured | 1443 | Only Inkling 2 Small measured |
| LMArena WebDev: React | 1523 | 1660 | Inkling 2 Small |
| LMArena WebDev: HTML | 1475 | 1661 | Inkling 2 Small |
| SWE-Bench Pro V2 | 95.0% | 97.7% | Inkling 2 Small |
| GameBench 2 | 59.3 | Not measured | Only Muse Spark Open measured |
| Neither model has a result on the other 34 boards here | |||
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index01
| Benchmark | Muse Spark Open | Inkling 2 Small | Leader |
|---|---|---|---|
| AA Intelligence Index | 24.9 | 30.6 | Inkling 2 Small |
| Epoch Capabilities Index | 155.4 | Not measured | Only Muse Spark Open measured |
Agentic workLike-for-likePublic boards, shown as published, kept out of the index13
| Benchmark | Muse Spark Open | Inkling 2 Small | Leader |
|---|---|---|---|
| LiveBench research | 82.7% | Not measured | Only Muse Spark Open measured |
| LiveBench browser | 26.2% | Not measured | Only Muse Spark Open measured |
| LiveBench long agentic | 12.1% | Not measured | Only Muse Spark Open measured |
| SREBench (Vals AI) | Not measured | 1.9% | Only Inkling 2 Small measured |
| Finance Agent (Vals AI) | 61.3% | Not measured | Only Muse Spark Open measured |
| Tax Agent Bench (Vals AI) | 26.3% | 38.9% | Inkling 2 Small |
| Legal Research Bench (Vals AI) | 38.5% | 46.6% | Inkling 2 Small |
| Harvey's Legal Agent Benchmark (Vals AI) | 25.0% | 21.7% | Muse Spark Open |
| Excel Modeling Benchmark (Vals AI) | 53.7% | Not measured | Only Muse Spark Open measured |
| BioMysteryBench (Vals AI) | Not measured | 70.0% | Only Inkling 2 Small measured |
| Terminal-Bench-Science (Vals AI) | Not measured | 2.9% | Only Inkling 2 Small measured |
| Vals Science Index | Not measured | 32.7% | Only Inkling 2 Small measured |
| APEX-Agents | 33.4% | 46.8% | Inkling 2 Small |
| MCP Atlas | Not measured | 85.4% | Only Inkling 2 Small measured |
| Neither model has a result on the other 30 boards here | |||
ReasoningLike-for-likePublic boards, shown as published, kept out of the index05
| Benchmark | Muse Spark Open | Inkling 2 Small | Leader |
|---|---|---|---|
| LiveBench reasoning | 73.7% | Not measured | Only Muse Spark Open measured |
| MysteryMechanism (Vals AI) | Not measured | 25.2% | Only Inkling 2 Small measured |
| GPQA Diamond (Artificial Analysis run) | 89.0% | Not measured | Only Muse Spark Open measured |
| Humanity's Last Exam (Artificial Analysis run) | 43.9% | 44.1% | Inkling 2 Small |
| HLE-Diamond (Artificial Analysis run) | 26.3% | 28.7% | Inkling 2 Small |
| CritPt v2, hard subset (Artificial Analysis run) | 29.5% | 35.0% | Inkling 2 Small |
| ARC-AGI | 89.0% | 96.5% | Inkling 2 Small |
| ARC-AGI-2 | 57.5% | 81.7% | Inkling 2 Small |
| LMArena Text: hard prompts | Not measured | 1421 | Only Inkling 2 Small measured |
| LMArena Text: expert | Not measured | 1478 | Only Inkling 2 Small measured |
| LMArena Text: hard prompts in English | Not measured | 1424 | Only Inkling 2 Small measured |
| Humanity's Last Exam (Scale run) | 28.0% | Not measured | Only Muse Spark Open measured |
| Neither model has a result on the other 14 boards here | |||
MathLike-for-likePublic boards, shown as published, kept out of the index01
| Benchmark | Muse Spark Open | Inkling 2 Small | Leader |
|---|---|---|---|
| MathArena | 25.6% | 42.4% | Inkling 2 Small |
| Neither model has a result on the other 13 boards here | |||
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index10
| Benchmark | Muse Spark Open | Inkling 2 Small | Leader |
|---|---|---|---|
| AA-Omniscience | 25.8 | 16.1 | Muse Spark Open |
| LMArena Text: science | Not measured | 1409 | Only Inkling 2 Small measured |
| LMArena Text: business and finance | Not measured | 1415 | Only Inkling 2 Small measured |
| PRBench Legal | 59.8% | Not measured | Only Muse Spark Open measured |
| Neither model has a result on the other 17 boards here | |||
Web designDirectional onlyPublic boards, shown as published, kept out of the index6 boards, none shared
| Benchmark | Muse Spark Open | Inkling 2 Small | Leader |
|---|---|---|---|
| Design Arena: websites | 1306 | Not measured | Only Muse Spark Open measured |
| Design Arena: UI components | 1312 | Not measured | Only Muse Spark Open measured |
| Design Arena: game dev | 1265 | Not measured | Only Muse Spark Open measured |
| Design Arena: 3D | 1247 | Not measured | Only Muse Spark Open measured |
| Design Arena: all code categories | 1301 | Not measured | Only Muse Spark Open measured |
| LiveBench design | 58.1% | Not measured | Only Muse Spark Open measured |
| Neither model has a result on the other 3 boards here | |||
GeneralLike-for-likePublic boards, shown as published, kept out of the index04
| Benchmark | Muse Spark Open | Inkling 2 Small | Leader |
|---|---|---|---|
| Vals Index | 48.6% | 56.1% | Inkling 2 Small |
| LiveBench data analysis | 60.2% | Not measured | Only Muse Spark Open measured |
| SAGE (Vals AI) | 85.8% | 88.6% | Inkling 2 Small |
| Long context reasoning (AA-LCR) | 78.3% | 83.3% | Inkling 2 Small |
| GDPval-AA | 1401 | 1630 | Inkling 2 Small |
| LMArena Text | Not measured | 1403 | Only Inkling 2 Small measured |
| LMArena Text: instruction following | Not measured | 1408 | Only Inkling 2 Small measured |
| LMArena Text: creative writing | Not measured | 1348 | Only Inkling 2 Small measured |
| LMArena Text: English | Not measured | 1418 | Only Inkling 2 Small measured |
| LMArena Text: non-English | Not measured | 1390 | Only Inkling 2 Small measured |
| LMArena Text: Russian | Not measured | 1377 | Only Inkling 2 Small measured |
| LMArena Text: multi-turn | Not measured | 1408 | Only Inkling 2 Small measured |
| LMArena Text: longer queries | Not measured | 1403 | Only Inkling 2 Small measured |
| LMArena Text: writing and language | Not measured | 1381 | Only Inkling 2 Small measured |
| LMArena Text: entertainment and media | Not measured | 1359 | Only Inkling 2 Small measured |
| MultiChallenge | 74.2% | Not measured | Only Muse Spark Open measured |
| Neither model has a result on the other 33 boards here | |||
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Muse Spark Open | Inkling 2 Small | 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 2 Small costs less
Repository review
50K input + 3K output tokens
Inkling 2 Small costs less
Agent loop
200K input + 10K output tokens
Inkling 2 Small 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 Open | Thinking Machines Inkling 2 Small |
|---|---|---|
| Maker | Meta | Thinking Machines |
| Weights | Open weights | Open weights |
| Released | October 15, 2026 | November 9, 2026 |
| Context window | 1.05M | 1.05M |
| Input $/Mtok | $1.25 | $0.30 |
| Output $/Mtok | $4.25 | $1.00 |
| Coding index | 43.4 | 48.9 |
| Independent measurements behind it | 4 | 3 |
| Cost per solved task | Not computable | Not computable |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Muse Spark Open better than Inkling 2 Small for coding?
Pick Inkling 2 Small for coding: it scores 48.9 on the Vibe Coding Index against 43.4 for Muse Spark Open, though on 3 benchmarks against 4. Pick Muse Spark Open for work measured by SciCode or Harvey's Legal Agent Benchmark (Vals AI), where it leads.
Which is cheaper, Muse Spark Open or Inkling 2 Small?
Muse Spark Open costs $1.25 per million input tokens and $4.25 per million output tokens; Inkling 2 Small costs $0.30 and $1.00. Cost per solved task is known for neither of them.
Which has the bigger context window, Muse Spark Open or Inkling 2 Small?
Neither: both take 1.05M tokens.
How many benchmarks is the Muse Spark Open vs Inkling 2 Small comparison based on?
25 benchmarks have a result for both models as of November 14, 2026. Muse Spark Open's coding index rests on 4 independent benchmarks and Inkling 2 Small's on 3. Where only one model has a result, the page says so instead of naming a winner.