Gemini 4 Argon
Claude Opus 5.5
Muse Wonder
MiMo-V2.6-Pro
Qwen3.8-Max
Kimi K3
GLM-5.3
GPT-5.5
ERNIE 5.1
DeepSeek-V4.1-Flash-20260910
Grok 4.20 Beta
amazon-nova-experimental-chat
Dola Seed 2.0 Pro
NVIDIA-Nemotron-3-Ultra-550B-A55B
Gemma 4 31B
Step 5 PreviewMuse Wonder vs Muse Spark 1.2
- Muse Wonder rates higher on LMArena’s text leaderboard: 1501 against 1482.
- Muse Spark 1.2 is cheaper: $1.25 / $4.25 per million input / output tokens, against $4 / $20 for Muse Wonder.
- On the 4 Vals AI benchmarks both have taken, Muse Wonder wins 4 and Muse Spark 1.2 wins 0.
LatestMuse Spark 1.2 1482
Side by side
Models (2/6)
- Muse Wonder
- Muse Spark 1.2
| Benchmark | Muse Wonder | Muse Spark 1.2 |
|---|---|---|
| The model | ||
| Lab | Meta | Meta |
| Released | 2026-10-12 | 2026-08-05 |
| Weights | Proprietary | Proprietary |
| Context window | 1M | 1M |
| Input, per 1M tokens | $4 | $1.25 |
| Output, per 1M tokens | $20 | $4.25 |
| LMArena, people’s votes | ||
| LMArena TextMillions of people compare two anonymous models side by side and vote for the better answer | 1501#7 of 351 | 1482#17 of 351 |
| LMArena WebDevPeople ask two anonymous models to build the same web app, try both and vote for the better one | 1651#18 of 124 | 1533#52 of 124 |
| LMArena VisionSide-by-side votes on prompts that include an image | — | 1304#17 of 146 |
| LMArena CodingLMArena’s text votes on prompts that ask for code | 1518#11 of 346 | 1505#18 of 346 |
| LMArena MathLMArena’s text votes on math prompts | 1484#30 of 339 | 1483#31 of 339 |
| LMArena Creative writingLMArena’s text votes on stories, poems and other creative writing | 1493#7 of 349 | 1435#56 of 349 |
| LMArena Hard promptsLMArena’s text votes on the hardest prompts | 1505#12 of 351 | 1490#20 of 351 |
| LMArena Instruction followingLMArena’s text votes on prompts with specific instructions to follow | 1493#10 of 351 | 1463#39 of 351 |
| Vals AI, overall | ||
| Vals IndexVals AI’s headline score | 64.88%#6 of 27 | — |
| Vals AI, coding | ||
| Terminal-Bench 4.0Frontier-difficulty tasks an agent completes in a real terminal | 49.49%#10 of 55 | 6.06%#46 of 55 |
| SWE-benchReal GitHub issues from open-source projects | — | 86.60%#14 of 85 |
| Vibe Code BenchBuilding complete web apps from a plain-language brief, graded on whether the app works | 83.09%#20 of 115 | 79.10%#27 of 115 |
| Code MigrationRewriting working programs in a new language, graded on whether the new program still passes its tests | 72.36%#5 of 28 | — |
| Vals AI, finance | ||
| Finance AgentThe core tasks of a financial analyst, done as an agent with research tools | 65.55%#6 of 31 | — |
| Finance IndexVals AI’s composite of finance tasks | 61.23%#6 of 31 | — |
| Tax Agent BenchAgentic research into US corporate tax questions | 36.27%#12 of 76 | 32.80%#17 of 76 |
| Vals AI, law | ||
| Legal IndexVals AI’s composite of legal tasks | 75.26%#3 of 28 | — |
| Legal Research BenchAgentic US legal research | 50.48%#6 of 85 | 43.75%#22 of 85 |
| Vals AI, medicine | ||
| MedCodeAssigning the right medical billing codes from clinical notes | — | 49.35%#24 of 107 |
| Vals AI, reasoning | ||
| MMLU-ProHarder, reasoning-focused multiple choice across 14 subjects, from law to engineering | — | 88.28%#20 of 138 |
| MMMUCollege-level questions that need both an image and text | — | 86.13%#22 of 93 |
| Terminal-Bench ScienceExpert-written scientific research workflows, run by an agent in a terminal | 22.86%#10 of 42 | — |
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Questions
Which is better, Muse Wonder or Muse Spark 1.2?
Muse Wonder rates higher on LMArena’s text leaderboard: 1501 against 1482. Muse Spark 1.2 is cheaper: $1.25 / $4.25 per million input / output tokens, against $4 / $20 for Muse Wonder. On the 4 Vals AI benchmarks both have taken, Muse Wonder wins 4 and Muse Spark 1.2 wins 0.
Which is cheaper, Muse Wonder or Muse Spark 1.2?
Muse Spark 1.2 is cheaper: $1.25 / $4.25 per million input / output tokens, against $4 / $20 for Muse Wonder.