Muse Spark Open

Meta
muse-spark-open
Released Oct 15, 2026
Providers
3
Context
1.0M
Input
$1.25/M
Output
$4.25/M
BAA-eligible on 2 of 3 providersPHI requires a signed BAA from Concentrate and HIPAA-enabled organization.

Meta's open-weight 816B-parameter mixture-of-experts model (about 42B active), trained for agentic coding, with a 1M-token context window. Supports image input, tool calling, structured output, and reasoning effort.

baseten/muse-spark-openQuantfp4
Input
$1.25/M
Output
$4.25/M
Context
1.0M
Max out
131K
Cache read
$0.15/M
Cache write
$1.25/M
Thinking out
$4.25/M
FlexPriority / Fast
fireworks/muse-spark-openQuantUnspecified
Input
$1.25/M
Output
$4.25/M
Context
1.0M
Max out
131K
Cache read
$0.15/M
Cache write
$1.25/M
Thinking out
$4.25/M
Flex
nebius/muse-spark-openQuantfp4
Input
$1.25/M
Output
$4.25/M
Context
1.0M
Max out
131K
Caching
Not offered
Thinking out
$4.25/M
FlexPriority / Fast