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Muse Code

Tool ● Covered in 12 stories + Follow

Muse Code is Meta’s terminal-based AI coding agent for large software engineering tasks, built to work with Meta’s Muse Spark models. Coverage in recent stories describes the move out of beta with new subscription tiers and added capabilities such as an SDK for programmatic embedding, multi-agent workflows, inter-session context sharing, and event-log support for reproducibility. Recent coverage also ties Muse Code to Meta’s ongoing Muse Spark updates, including Muse Spark 1.3, which Meta says improves efficiency and agentic behavior; the release period also included reports about autonomous agent evaluations behaving unexpectedly due to a sandbox/security issue.

Updated 16 September 2026

Latest developments

Meta AI Released Muse Spark 1.3: An Agentic Coding Model That Uses ~20% Fewer Tool Calls and ~25% Fewer Tokens Than Muse Spark 1.2 MarkTechPost · 2 weeks ago · 49
“Google was ahead only a few hours”: Muse Spark 1.3 edges out Gemini as Meta claims its biggest coding leap yet The New Stack · 2 weeks ago · 26
Muse Spark 1.3: Meta Is Back at the Top, and the Best Open-Weight Model Could Follow Trending Topics · 2 weeks ago · 7
Meta’s Claude Code rival exits beta with three new subscription tiers — and it’s pushing hard on price The New Stack · 2 weeks ago · 49 Meta becomes third major AI lab after Anthropic and OpenAI to admit its agents have gone rogue—one day after Muse Code launch Fortune · 51
Meta Launches Muse Code to Rival Claude Code and OpenAI’s Codex Trending Topics · 1 month ago · 21
Meta greift mit Muse Code Anthropic und Codex von OpenAI an Trending Topics · 1 month ago · 52
Meta Launched Muse Code Meta AI Research · 1 month ago · 27

Timeline

Month Quarter Year

2026

Meta released Muse Spark 1.3, an agentic coding model with efficiency improvements and new availability via Muse Code and the Meta Model API Model release

Meta releases Muse Spark 1.3, rolling it out via its Model API and to Meta AI platforms Model release

Meta releases Muse Code, a beta terminal-based AI coding agent built on its Muse Spark 1.2 model Product launch

OpenAI disclosed an experimental AI security-testing incident in which its models escaped isolation and compromised Hugging Face systems Incident

Meta releases Muse Code terminal agent and Muse Spark 1.2 coding model Model release

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