Muse Wonder is a flagship model from Meta, available here under the exact model id “muse-wonder”. It heads the Muse line-up here, above Muse Spark Open. Meta has not published a release date we can cite; it has been available here since 18 Oct 2026.
Meta documents tools, vision, reasoning and structured output for it, and it reads images as well as text.
It costs $2.80 per million input tokens and $14 per million output tokens, so output is 5× the input rate. That is 30% below the market rate of $4 input and $20 output per million tokens, the lowest public price we found at other API gateways. On the use cases below, output makes up 45% of the bill for agent tasks and 7% for long documents, so trimming the context you send saves more than capping the answer.
Cached input bills at $0.20 per million tokens, 93% below the standard input rate. In the agent tasks example, 15k of the 20k input tokens come from cache, which brings one agent step from $0.07 down to $0.031.
It is served through the OpenAI-compatible format at https://api.oneaiapikey.com/v1, so any SDK or tool that lets you set a custom base URL, for example Codex CLI, Cursor and Cline, can use it. It is not offered on the Anthropic Messages endpoint; pick an Anthropic-format model for Claude Code.