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Developer builds sub-$10/month AI coding stack on Linux using open-source tools

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A software developer has shared a cost-efficient AI coding setup built on Linux Mint, using the open-source Hermes Agent TUI from Nous Research alongside the DeepSeek V4 Pro API and a free Gemini API tier. The stack replaces paid tools like GitHub Copilot and Cursor, with the developer reporting monthly API costs of just $5–8 despite coding four to six hours daily. DeepSeek V4 Pro is used as the primary reasoning model at $0.43 per million tokens, roughly 85–90% of Claude's quality at about 15% of the price, while Gemini handles web searches and documentation queries at no cost. Hermes Agent runs entirely in the terminal, offering persistent memory, auto-generated skills, and support for multiple AI providers without locking the user into any single IDE or cloud service. The developer argues the setup delivers competitive coding assistance while avoiding vendor lock-in and keeping monthly costs well below mainstream subscription alternatives.

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