Open Interpreter went quiet for two years. It came back on July 13, 2026 as something else entirely: a Rust CLI forked from OpenAI’s Codex, aimed squarely at open weights. 66k stars, +661 in a day.
One agent loop per model, not one for everyone
Most coding agents ship a single generic loop and swap the model behind it. Open Interpreter ships harnesses — kimi-code, qwen-code, deepseek-tui, claude-code — and picks one based on what you’re running. Point it at Kimi K3 and it defaults to the Kimi harness. Switch with /harness. The bet: a cheap open model with a loop built around its quirks beats the same model dropped into a harness designed for Claude.
The sandbox is the real unlock
Reads, writes and network calls run inside native OS sandboxing on macOS, Linux and Windows. Anything outside the workspace needs approval. That matters more when you’re handing the keyboard to a cheap open model you trust less. A desktop app pushes the same loop into Word, Excel, PDFs and browsers.
Install is one curl line, Apache-2.0, connect any model. It speaks Agent Client Protocol, so editors can drive it directly.
Frontier coding agents are getting more expensive. This one’s arguing the gap is a software problem.
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