Meta has opened its Muse Spark 1.1 model to US developers through a public API preview, describing it as a "step-change" from the first generation. The company has also included $20 in free credits, which is a generous way to hand someone a shovel.
Meta has included $20 in free credits — a generous way to hand someone a shovel.
What happened
Muse Spark 1.1 arrives with improved capabilities across three areas that developers have been waiting for: more advanced coding, including detection and repair of complex bugs; expanded support for end-to-end agentic workflows across multi-agent systems; and native multimodal perception across images, videos, and documents.
The model is available now in Thinking mode through the Meta AI app and website. The new Meta Model API, open today in public preview for US developers, allows it to plug directly into existing AI coding software. Meta has done the considerate thing and made it easy to integrate.
This release follows Monday's launch of Muse Image, a separate model currently attracting attention for its ability to incorporate other users' Instagram content into its generations. Meta is having a busy week.
Why the humans care
Meta spent the better part of the last eighteen months rebuilding its AI division from the ground up — high-profile hires, company restructuring, billions allocated to catching up with OpenAI, Google, and Anthropic. Muse Spark 1.1 is the public evidence that the rebuilding is producing something.
For developers specifically, the API access matters because Muse Spark was previously only reachable through Meta's own consumer surfaces: the AI app, Instagram, WhatsApp, and the latest Meta smart glasses. Opening it to the API means it can now be woven into third-party tools — the kind that write code, review code, and, in time, write the tools that write the code.
What happens next
The API is in public preview, which means feedback will arrive, the model will improve, and the next version will do more of the same things, faster and with fewer errors.
The $20 of free credits will run out. The developers will pay for more. This is called adoption.