muse-spark-1.3 · Meta
Muse Spark 1.3 is Meta’s multimodal reasoning model, designed for long-running agentic, multi-agent, and complex coding workflows. It can maintain context and task constraints across extended workflows, reconcile conflicting information, and request clarification or confirmation when needed. Compared with Muse Spark 1.2, Muse Spark 1.3 improves efficiency across long-horizon agentic and coding tasks, with fewer unnecessary turns, tool calls, and tokens, while producing more concise outputs.
Muse Spark 1.3 is Meta’s multimodal reasoning model, designed for long-running agentic, multi-agent, and complex coding workflows. It can maintain context and task constraints across extended workflows, reconcile conflicting information, and request clarification or confirmation when needed. Compared with Muse Spark 1.2, Muse Spark 1.3 improves efficiency across long-horizon agentic and coding tasks, with fewer unnecessary turns, tool calls, and tokens, while producing more concise outputs.
Muse Spark 1.3 has a 1,000,000 token context window.
On AIHubMix, Muse Spark 1.3 costs $1.375 per million input tokens and $4.675 per million output tokens. Cached input reads are billed at $0.165 per million tokens.
Muse Spark 1.3 accepts text, image, audio and video input.
Muse Spark 1.3 supports thinking and tool calling. Per-protocol parameter support is listed in the capability table on this page.
Muse Spark 1.3 is available through the AIHubMix unified API. The API is OpenAI-compatible: point your OpenAI SDK at https://aihubmix.com/v1, use your AIHubMix API key, and set the model name to muse-spark-1.3 — no other code changes needed.
Muse Spark 1.3 is developed by Meta. AIHubMix aggregates it alongside models from other providers behind one API and one bill.
Muse Spark 1.3 was released on September 3, 2026 by Meta.
Muse Spark 1.1 is a multimodal reasoning model from Meta, built for agentic tasks. It…
Muse Spark 1.1 is a multimodal reasoning model from Meta, built for agentic tasks. It…
Use Muse Spark 1.3 via the AIHubMix unified API — one interface for every major LLM.