# Meta Releases 816B-Parameter Muse Spark Open

> Meta launches open-source AI model for coding and agent work with 816 billion parameters.
- Title: Meta Releases 816B-Parameter Muse Spark Open · SiliconANGLE
- Summary: Meta launches open-source AI model for coding and agent work with 816 billion parameters. Meta released an open-weight AI model with 816 billion parameters…
- Keywords: meta, muse spark open, coding, agent work, 816b parameters, open weights, technology, enterprise, Releases, 816B-Parameter, Muse, Spark
- Source: SiliconANGLE — https://siliconangle.com/2026/10/15/meta-releases-816b-parameter-muse-spark-open-for-coding-and-agent-work
- Author: Duncan Riley
- Published: 2026-10-15T22:20:54+00:00
- Read time: 1 min
- Topics: meta, muse spark open, ai, coding, agent work, 816b parameters, open weights, technology, enterprise
## Meta releases Muse Spark Open
Meta Platforms Inc. released open weights for its Muse Spark AI model designed for coding and long-running agent work.
## Model specs
The model has 816 billion parameters with only 42 billion switching on per token for coding and agent tasks.
## Context window
Prompts can mix text, images, audio, or video with a context window up to 1 million tokens.
## Safety features
Meta added safety post-training to hold up without Meta’s own services guardrails.
## Benchmark results
Muse Spark Open scored 61.8 on JobBench agent test, more than twice Inkling’s 31.1.
## Chinese models stronger in coding
Kimi K3 led Terminal-Bench 2.1 coding test at 85, while GLM 5.3 and Qwen3.8 scored above Muse Spark Open’s 76.4.
## Tool use performance
Muse Spark Open scored 89.2 on MCP-Atlas tool use, beating all rivals including Chinese models.
## Key takeaway

Meta released an open-weight AI model with 816 billion parameters for coding and agent tasks, outperforming most Chinese models in tool use but lagging in coding benchmarks.