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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.

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.