Start with your project
Open a workspace and describe the task. Keep project instructions and the conversation close to the code.
Your models. Your tools.
One coding harness.
Koder is the AI your developers build with. Plan, code and test software, and build and evaluate agents that deploy to aixplain cloud or your servers. Any model, including local ones, on Desktop or in the CLI.
Choose your downloadFree to install · macOS, Windows, and Linux
GitHubA harness that works where your code lives.
The harness is the working environment around the model: repository context, tools, permissions, and session state. Koder brings those pieces together so you can guide the task and inspect what happens.
Choose how it works
Pick a model and configure tool permissions. Connect the tools your workflow needs through MCP.
Review the result
Follow the session, inspect changes, and run checks. You decide when the work is ready to ship.
Built around your workflow.
Terminal or desktop
A keyboard-first terminal experience, plus a desktop workspace for conversations, files, and change review.
Your choice of models
Use the aixplain Marketplace, connect a supported provider, or work with a local model. Availability and capability depend on your setup.
Context that stays with the task
Return to sessions, work across projects, and delegate focused work to agents without losing the conversation.
Tools you can inspect
See tool activity and configure permissions before an agent acts. Permissions guide tool access; they don’t replace sandboxing on your machine.
Your next project starts here.
Choose the desktop app or install the CLI. The app is free to install; model usage may have a separate cost.
Latest public releaseA few things to know.
How do I deploy agents?
Your developers build with Koder and our Agents SDK, in your own codebase. Koder runs on Desktop or in the CLI, on any model, including local ones that keep your data on your machine. They deploy each agent to aixplain cloud, where it runs 24/7, or to your own servers. Every agent has an ID and an API your teams and customers reach with a secure key, with rate limits, a budget, monitoring and tracing. Agents are versioned, with separate staging and production, and you can roll back to an earlier version. Start in our cloud and move to your servers later: your agents and workspace move too, with no rebuild.
Do I need an aixplain account?
Koder asks you to sign in to aixplain the first time it runs. Signing up is free, with no card needed. Then use aixplain models, connect a supported provider with your own credentials or run a local model.
Does my code leave my machine?
It depends on the model and tools you pick. With a cloud model, the code and context in each request go to that model’s provider. Local models and tools keep your work on your machine. We never sell your data or train on it.
What does Koder cost?
Koder is free to install. Core, at $0 a month, includes access to Omni and Koder. You pay as you go for the aixplain models each run uses, at the provider’s price with no markup, and every run shows its cost. A provider you connect yourself charges under its own pricing. Local models don’t count toward your usage.