Muse Spark Open is an open-weight reasoning model from Meta for coding and agentic workflows. It supports tool calling and native image understanding in a single checkpoint, using a sparse Mixture-of-Experts architecture with 816B total / 42B active parameters and a 1M-token context window.
Modalities
In / out price
$1.5625 / $5.3125per 1M
Cached price
$0.1875per 1M
Context
1M
Max output
131K
Providers
1 routeCompare providers by price, privacy, and speed.
| Private | $1.5625 | $5.3125 | $0.1875 | 1M | 131K | — | — |
Privacy
2 / 4Private routing
Private tier
- Anonymous
- Private
- TEE
- E2EE
Prompt and response content is not retained after the request. Request content is visible to the inference runtime while it is being processed. Learn more
Features
8Streaming
Tool calling
Reasoning
Vision
JSON/schema
Web search
Code optimized
Prompt caching
Uptime
FAQ
Common questions about Muse Spark Open.