Muse Spark 1.2
Muse Spark 1.2 is Meta's hosted coding and agent model for code generation, complex debugging, codebase understanding, long-horizon workflows, and tool use.
Newer version: Muse Spark 1.3
Provider
Meta
Model family
Meta Muse
Hosted multimodal coding and agentic LLM
Cost tier
Spark
Status
Current
Release Aug 5, 2026
Why teams choose it
Muse Spark 1.2 is a hosted Meta Model API checkpoint
distinct from the open-weight Muse Glimmer 30B release.
Meta co-trained the model with Muse Code for long-horizon coding
planning, compaction, and persistent subagent workflows.
The standard and contributor endpoints serve the same checkpoint but have materially
different pricing and training-data terms.
Tradeoffs to know
- Muse Spark 1.2 weights are not part of the Muse Glimmer open-weight release; use the hosted API unless Meta publishes a separate checkpoint.
- The low-cost contributor tier permits use of prompts and completions to improve Meta products; review data policy before sending proprietary code.
- Vendor evaluations are harness-sensitive and should be reproduced with the intended tools, approvals, and repository tests.
Technical specs
- Inputs
- text, image, video, PDF
- Outputs
- text
- Capabilities
- coding, complex debugging, codebase understanding, long-horizon agents, tool calling, planning, context compaction, multi-agent workflows
- License
- Proprietary API
- Source
- https://research.meta.ai/blog/introducing-muse-code-and-muse-spark-1-2
Benchmarks
No independent or vendor benchmark scores in this catalog entry.
Meta Muse family lineup
Related models
Muse Spark 1.2 FAQ
What is Muse Spark 1.2?
Muse Spark 1.2 is Meta's hosted coding and agent model for code generation, complex debugging, codebase understanding, long-horizon workflows, and tool use. It is available through Muse Code and Meta Model API with a 1M-token context window and separate standard and contributor data-use tiers.
When does Muse Spark 1.2 fit best?
Long-running coding agents
What should teams watch out for with Muse Spark 1.2?
Muse Spark 1.2 weights are not part of the Muse Glimmer open-weight release; use the hosted API unless Meta publishes a separate checkpoint.
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