Last refreshed 2026-10-15. Next refresh: weekly.
Why use Muse Spark Open on Together AI?
Together AI offers Muse Spark Open with pay-as-you-go pricing at $1.25/1M input tokens. Together AI is a platform for running open-source and proprietary LLMs with fast serverless and dedicated endpoints at competitive inference pricing.
Compare Muse Spark Open across 4 providers to find the best fit for your use caseInput / 1M
$1.25
Output / 1M
$4.25
Cache
read $0.15
Batch
Not sourced
Setup recipe
Python + curlInstall
pip install togetherAuth
export TOGETHER_API_KEY=...Call
from together import Together
client = Together() # reads TOGETHER_API_KEY from env
response = client.chat.completions.create(
model="meta-models/Muse-Spark-Open-816B-A42B",Model ID
meta-models/Muse-Spark-Open-816B-A42BRequest example
from together import Together
client = Together() # reads TOGETHER_API_KEY from env
response = client.chat.completions.create(
model="meta-models/Muse-Spark-Open-816B-A42B",
messages=[{"role": "user", "content": "Hello"}]
)
print(response.choices[0].message.content)Gotchas
- Use provider model ID "meta-models/Muse-Spark-Open-816B-A42B", not the LLMReference slug "muse-spark-open".
- Together uses "organization/model-name" format, e.g. "meta-llama/Llama-4-Scout-17B-16E-Instruct" or "Qwen/QwQ-32B". See the Together model catalog for the exact ID.
- The examples expect TOGETHER_API_KEY; rename it only if your application config maps the new variable.
Compare Muse Spark Open Across Providers
| Provider | Input (per 1M) | Output (per 1M) |
|---|---|---|
| Together AI | $1.25 | $4.25 |
| Fireworks AI | $1.25 | $4.25 |
| GroqCloud | — | — |
| OpenRouter | — | — |
Pricing
| Type | Price (per 1M) |
|---|---|
| Input tokens | $1.25 |
| Output tokens | $4.25 |
Capabilities
VisionMultimodalReasoningJSON / Tool useAudio
About Muse Spark Open
Muse Spark Open is the open-weight release of Meta Superintelligence Labs' Muse Spark, an 816-billion-parameter mixture-of-experts model that activates about 42 billion parameters per token. Released October 15, 2026 under the Muse Model License, it is built for coding and agentic work, takes text, image, video and audio input, returns text, and has a 1M-token context window. Weights are on Hugging Face in BF16 and NVFP4.
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Model Specs
Released2026-10-15
Parameters816B (42B activated)
Context1M
ArchitectureMixture of Experts