Flint 40B is free on OpenCode, a new open coding-agent model at no cost!
OpenCode Zen added Flint 40B Free, the free version of Recursive's open-source coding model Flint. Input, output, and cache reads cost nothing. Flint is a mixture-of-experts model with about 40B total and 2.5B active parameters and about 262K tokens of context. It's also free on OpenRouter and Kilo, and no end date has been announced.
Use Flint 40B Free at no cost, with free input, output, and cache reads
- Eligibility：
- Any OpenCode Zen account; also available with an OpenRouter or Kilo account
- Benefit duration：
- Free for a limited time, no end date announced yet
The briefing
OpenCode Zen has added Flint 40B Free (model ID flint-40b-free), the free version of Recursive's newly open-sourced coding model Flint. Anyone with an OpenCode Zen account can use it at no cost.
What you can use
Input, output, and cache reads on Flint 40B Free are all billed at $0. It's free for a limited time, with no end date or usage cap announced yet. Requests made during the free period may be used to improve the model and are kept for 30 days, so switch to a paid model for sensitive code.
If you'd rather use another provider, Flint is also free on OpenRouter and Kilo (model ID recursive/flint-v1.0:free), with input and output billed at $0 there too.
Specs
Flint is a mixture-of-experts model with about 40B total parameters and about 2.5B active, built by Recursive's autoresearch system Eureka Machine for coding agents. It takes text input only, supports about 262K tokens of context, reasons by default, and handles tool calling and structured JSON output. The weights are open under Apache 2.0 on Hugging Face.
How to use it
- Open OpenCode, sign in to Zen, and switch to Flint 40B Free with
/models, or set the model toopencode/flint-40b-freein your config. - For the API, use the endpoint
https://opencode.ai/inference/openai/v1/chat/completionswith modelflint-40b-free. - On OpenRouter, use model
recursive/flint-v1.0:free.
More details: OpenCode Zen docs · Flint (free) on OpenRouter · Flint on Hugging Face · Hacker News discussion.