The best coding agent for open models
Magnitude is built from the ground up around open models. It matches the performance of Claude Code at 5x lower token prices.
- Easy setup — One API key and you're up and running.
- Reliable — We fix common open model failure modes.
- Best models — We constantly test new model setups.
- Web search — Built-in web search that is fast and reliable.
- Private — Zero data retention on your prompts and code.
- Transparent — API prices with no markup, $5 free credits.
Get started
- Run
npm i -g @magnitudedev/cliin the terminal - Run
magnitudewhich will ask for an API key - Sign up at app.magnitude.dev to get your free API key
If you are on Windows, you will need to use
wsl.
$5 of free credits to start, no card required. API pricing with no markup after that.
Want to chat about your use case for open models? Book a call with our founder
What's under the hood?
- Constrained decoding. Custom GBNF grammar that prevents common open model failure modes like overthinking and malformed tool calls.
- Robust streaming parser. Speculative execution with rollback resolves ambiguous decision points that break naive parsers on open model output.
- Harness reliability. Mid-stream schema validation and structured error feedback ensure the model always gets a corrective signal to work off.
Specialized agents
Magnitude is a curated system of specialized agents, each with its own defined role. These agents are made up of a system prompt, specific context, scoped toolsets, and a dedicated model + reasoning level. Here's the agents we include:
- Leader. Talks to the user and delegates work. Model: GLM 5.1.
- Scout. Fast and efficient exploration. Model: Kimi K2.5.
- Architect. Plans and high-level design thinking. Model: Kimi K2.6.
- Engineer. Concrete planning and implementation. Model: Kimi K2.6.
- Critic. Critical and detail-oriented analysis. Model: Kimi K2.6.
- Scientist. Empirical debugging and information gathering. Model: Kimi K2.6.