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Dev.to
Dev.to
5/12/2026
I Built a Fully Autonomous Coding Agent for Under $50/Month — Here's the Exact Setup

I Built a Fully Autonomous Coding Agent for Under $50/Month — Here's the Exact Setup

Short summary

Multi-model autonomous coding agent using LangGraph routes tasks to Claude (refactoring), GPT-4o (debugging), and Gemini (docs) for under $50/month. Includes filesystem, terminal, and deployment capabilities with intelligent task routing. Complete implementation with code examples and cost breakdown.

  • Multi-model routing architecture uses Claude for refactoring, GPT-4o for debugging, Gemini for documentation
  • Total cost under $50/month: Claude API $20, GPT-4o $20, Gemini free tier $7
  • Agent has filesystem access, runs tests, deploys code—handles 70% of daily development tasks

Generated with AI, which can make mistakes.

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