Muse Spark Open
Muse Spark OpenAlternatives?
CheaperGemini 3.8 Flashunstatedsame-25%*$0.75 / $3.75Sampling parameters are ignored+1
BetterGPT-6.1 Solmaxwins 58%+100%$0.72Remove unsupported parameters+5BetterGPT-6 Astralowwins 57%+900%$0.82Monitoring can return HTTP 403+2BetterGPT-6 Solmaxwins 57%+100%$1.04
BetterClaude Opus 5.5highwins 57%+300%$1.82No forced tool use+5Gemini 3.8 Flashunstatedsame-25%*$0.75 / $3.75Sampling parameters are ignored+1GPT-6.1 Solmaxwins 58%+100%$0.72Remove unsupported parameters+5GPT-6 Astralowwins 57%+900%$0.82Monitoring can return HTTP 403+2GPT-6 Solmaxwins 57%+100%$1.04Claude Opus 5.5highwins 57%+300%$1.82No forced tool use+5Claude Fable 5.1lowwins 57%+900%$2.37Replace forced tool_choice+5Muse Spark 1.3unstatedsame—$1.25 / $4.25Only auto tool_choice is supported+5Muse Wondermaxn/a—$4.52Only auto tool_choice is supported+5Muse Wonder Fulln/a——Only in Muse CodeMuse Glimmer 30BhighOpenn/a—$0.058Context: 1M → 131KMuse Spark 1.2xhighn/a—$0.97Only auto tool_choice is supported+1Muse Spark 1.1xhighn/a—$1.38Only n=1 · Meta / Chat Completions+1Muse Sparkthinkingn/a—$1.25 / $4.25Only n=1 · Meta / Chat Completions+1Llama 4 Mavericknon-thinkingOpenn/a—$0.038All Meta models →Run it yourself
estimateBenchmarks
in Chat & KnowledgeWatch out 2
Reasoning off leaves output unchanged · Self-hosted / llama.cpp›
In llama.cpp, --reasoning off leaves the output unchanged; set reasoning_effort low to spend fewer thinking tokens. Source ↗
Memory beyond the weights · Self-hosted›
Serving requires extra memory for KV cache, activations and runtime overhead; budget roughly 2 TB of VRAM for BF16. Source ↗
FAQ
How much does Muse Spark Open cost?›
$1.25 per 1M input tokens and $4.25 per 1M output tokens (cheapest host: Modal). A typical benchmark task costs about $0.84 at xhigh effort.
Is Muse Spark Open free to use?›
There is no free API; the cheapest paid price is $1.25 per 1M input tokens. The weights are open, so you can run it yourself.
How good is Muse Spark Open, and what is it best at?›
#26 of 334 in Chat & Knowledge, #40 of 132 in Coding, #36 of 133 in Agents & Tool Use, #13 of 124 in Vision & Documents. Strongest at: Agents & work tasks, Reasoning, Science, Long context, Knowledge, Vision.
Is Muse Spark Open better than Grok 4.7?›
On MathArena · BrokenArXiv · August 2026, Muse Spark Open scores 29.2 vs 35.1 — about the same. It is 77% cheaper per task.
How can I use Muse Spark Open?›
Through the API of BaseTen, Fireworks, Modal, Nebius, Together.
What is the context window of Muse Spark Open?›
1M tokens, with up to 944K output tokens.
When was Muse Spark Open released? Is there a newer version?›
Released 2026-10-15. It is the current version in its line.
Is Muse Spark Open open source?›
Yes, the weights are open (muse-model-license licence).
Can I run Muse Spark Open locally?›
The weights are open and can be self-hosted; hardware needs are not confirmed yet.
Can Muse Spark Open read images?›
It accepts text and images, PDF files, audio, video as input.
What is Muse Spark Open?›
Muse Spark Open is an open-weights language model from Meta, released Oct 2026.
What are the best alternatives to Muse Spark Open?›
Gemini 3.8 Flash (cheaper), GPT-6.1 Sol (better).