Meta: Muse Spark 1.3 API
Muse Spark 1.3 is Meta's latest model for agentic and coding work, improving multi-step tool use, browser and long-horizon tasks, and coding over 1.2, with image, video and PDF input and a 1M-token context window.
- Context window: 1,048,576 tokens
- Input: text, image, video, file
- Output: text
- Reasoning: Supported
- Tool calling: Supported
- File input: Supported
- Released: 2026-09-02
Frequently Asked Questions
What is the context window of Muse Spark 1.3?
Muse Spark 1.3 supports a context window of up to 1,048,576 tokens.
Does Muse Spark 1.3 support function calling?
Yes. Muse Spark 1.3 supports tool / function calling.
Does Muse Spark 1.3 support reasoning?
Yes. Muse Spark 1.3 is a reasoning-capable model.