Reasonix

Code & Development

esengine

FreeOpen SourceAPI

About

DeepSeek-native AI coding agent for your terminal. Cache-first architecture with 90%+ prefix cache hit rate. CLI/TUI/Desktop/Web UI/ACP editor.

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Our Verdict

Highly Recommended

A cost-efficient DeepSeek-native coding agent

Reasonix stands out with its cache-first architecture that makes long coding sessions economically viable. With 29K+ GitHub stars in just 3 months, it has quickly become one of the most popular DeepSeek-native coding agents. The MCP first-class support, multiple UI modes, and single Go binary make it a compelling choice for developers who want to minimize API costs while maintaining productivity. The 1,402 open issues reflect its early-stage nature, but the rapid development pace and 98+ contributors suggest a strong trajectory.

Best for

•DeepSeek R1 users who want cost-efficient coding
•Developers needing long-running AI coding sessions
•Teams wanting MCP-integrated agent workflows

Consider alternatives if

•You use non-DeepSeek models (Claude Code, Codex)
•You prefer a fully managed cloud solution

Try Reasonix

Supported Platforms

Web AppWindowsmacOSLinuxAPI

Available platforms include Web App, Windows, macOS, Linux, and API.

Key Features

Cache-first architecture: 90%+ prefix cache hit rate, ~1/5 input token cost

DeepSeek-native, append-only session history aligned with prefix-cache

MCP first-class: stdio, SSE, streamable HTTP

Plan mode with sandbox and permission controls

Subagents: explore, research, review, security-review

CLI/TUI, Desktop app, local Web UI, and ACP editor integration

Single Go binary, no CGO, cross-compiled for all platforms

Skill system with Markdown-based skill scripts

98+ community contributors, MIT license

Pricing

free

Free and open source (MIT)

Use Cases

Daily coding and development tasks

Long-running coding sessions with cost efficiency

Multi-repository project management

AI agent workflow with MCP tool integration

Pros

29K+ GitHub stars, rapidly growing

Cache-first architecture dramatically reduces costs

MCP first-class support for tool integration

Single Go binary, no runtime dependencies

Multiple UI modes: CLI, TUI, desktop, web, editor

DeepSeek-native, optimized for R1 series models

MIT licensed, 98+ community contributors

Cons

DeepSeek-specific, not optimized for other models

1,402 open issues indicate active but early-stage development

Relatively new project (April 2026)

Requires DeepSeek API key for use

Latest Update

2026-08: v1.19.3 released, 29K+ GitHub stars, 98+ contributors

Get Started in 3 Steps

Get started in 5 steps

Install Reasonix

Install globally via npm.

Install

npm i -g reasonix

Navigate to your project

Point Reasonix at your repository. It maps your codebase once and keeps it warm in the prefix cache.

Start

cd your-project && reasonix

Open Web UI or keep in terminal

Use the TUI in terminal, open the local Web UI, or connect via VS Code extension.

Web UI

reasonix serve --auth token

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