Muse Spark
Meta's flagship reasoning model (latest Muse Spark 1.3) for coding and long-horizon agents, via Muse Code and the Model API.
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Our review
The following is compiled from public reports around Sep 2, 2026 and is for reference only; confirm details on Meta's official channels.
Reports say Muse Spark 1.3 went live that day in Muse Code and the Meta Model API: same price and 1M-token window as 1.2, with about 20% fewer tool calls and 25% fewer tokens on coding work, plus stronger long-horizon, multi-task and complex-instruction handling. Weights stay closed; the max reasoning tier still needs extra safety review. Meta has said it will roll the model into Instagram, Facebook and Meta AI over time.
Unlike free, social-app Meta AI, Muse Spark is a paid developer flagship. Availability and ecosystem are still moving; treat this page as a snapshot of public information if you are tracking Meta's coding/agent line.
Pros
Cons
Key features
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FAQ
What is Muse Spark?
Meta's flagship reasoning model (latest Muse Spark 1.3) for coding and long-horizon agents, via Muse Code and the Model API.
What are the pros and cons of Muse Spark?
Pros: Coding and agent efficiency, 1M long context, Same price as 1.2, Muse Code access. Cons: Closed weights, Pending official confirmation, Max tier not fully open.
How much does Muse Spark cost?
API standard: $1.25 / $4.25 per 1M tokens.
Who is Muse Spark for?
Best for Coding agents, Long-horizon tasks, Multi-task threads, Developer API.
What are the alternatives to Muse Spark?
Consider Claude, ChatGPT, Gemini.
Pricing
- • Input / output
- • 1M context
- • Cache hits ~$0.15