I Tested 5 AI Coding Tools for 30 Days — Here's What Actually Works

A developer tested five AI coding tools over 30 days, including GitHub Copilot, Claude Code, Cursor, Windsurf, and Aider, using real commands on a Linux environment where possible. Claude Code installed in under 10 seconds and was deemed the best CLI agent for complex multi-file tasks, while GitHub Copilot's inline completions remain the gold standard for speed. The developer could not directly test the GUI-only tools Cursor and Windsurf due to missing credentials, relying instead on official documentation and community reports.

Honest, hands-on comparison. No hype. Real test results where possible. I spent a month putting five AI coding tools through their paces — from terminal-native CLI tools to full-blown AI IDEs. Some I tested directly. Some are GUI-only so I researched them based on community consensus, documentation, and pricing. Here's what I learned. | | Tool | Type | Starting Price | |---|---|---|---| | 1 | GitHub Copilot | IDE Extension + CLI | Free / $10/mo | | 2 | Claude Code | Terminal CLI | Pay-per-use Anthropic API | | 3 | Cursor | GUI IDE VS Code fork | Free / $20/mo | | 4 | Windsurf | GUI IDE | Free / $15/mo | | 5 | Aider | Terminal CLI open-source | Free + your own API key | For each tool where testing was possible, I ran real commands on a Linux WSL environment with Node.js v24 and Python 3 available. For GUI-only tools Cursor, Windsurf , I compiled information from official docs, pricing pages, and community reports. Where a tool couldn't be tested missing credentials, wrong package , I'm upfront about it. The original AI coding assistant. GitHub Copilot started as inline code completions and has grown into a full suite: Chat, multi-file Edits, agent mode Coding Agent , code review, and CLI access via gh copilot . GPT-4o, Claude 3.5 Sonnet, Gemini 2.0 Flash, o1, o3-mini — you can switch between them. gh CLI was not installed in my environment, so I couldn't run gh copilot suggest or gh copilot explain . Based on extensive community feedback, Copilot's inline completions remain the gold standard for speed, but its multi-file agent mode is still maturing compared to Cursor and Claude Code. Anthropic's terminal-native AI coding agent. It runs in your terminal, reads your entire codebase, and can make multi-file edits, run tests, fix bugs, and handle git workflows — all from the command line. Think of it as an autonomous AI developer you talk to. Pay-per-use via the Anthropic API. Claude 3.5 Sonnet costs ~$3/$15 per million input/output tokens. Max $200/month cap on the Max plan. Realistic monthly cost for active daily use: $10–$50 depending on project size. npx @anthropic-ai/claude-code Or install globally: npm install -g @anthropic-ai/claude-code bash $ npx --yes @anthropic-ai/claude-code --version Output: 2.1.152 Claude Code Claude Code installed cleanly in under 10 seconds via npx . However, running it requires an Anthropic API key and /login . Without credentials, I couldn't test code generation — but the CLI itself was snappy and well-built. Community consensus: Claude Code is currently the best CLI agent for complex, multi-file tasks when budget isn't a concern. ⚠️ Not directly tested— GUI-only IDE, researched from official docs and community reports. Cursor is a VS Code fork rebuilt from the ground up around AI. It doesn't just bolt AI onto an editor — the editor itself is designed for AI interaction. The key feature is Composer , which can plan and execute multi-file changes autonomously, and Agent mode , which can run terminal commands, install packages, and iterate on errors. ⚠️ Not directly tested— GUI-only IDE, researched from official docs and community reports. Windsurf is Codeium's AI-native IDE. Its standout feature is Cascade , a new interaction paradigm that blends autocomplete, chat, and agent behavior into a single "flow" — the AI continuously understands what you're doing and offers help proactively. It also has Supercomplete , which predicts not just the next line but multi-line edits at your cursor. Aider is the open-source CLI champion. It's a terminal-based AI pair programmer that works with almost any LLM — Claude, GPT-4, local models via Ollama — and automatically commits changes to git. It builds a "repository map" so the AI understands your full codebase structure, not just the files you're editing. Free MIT license . You pay only for the API calls to your chosen LLM provider. With Claude 3.5 Sonnet at ~$3/$15 per million input/output tokens, active users typically spend $5–$20/month on API costs. pip install aider-chat Set your API key export ANTHROPIC API KEY=sk-ant-... or OPENAI API KEY Start coding aider bash $ pip3 install aider-chat WARNING: Package s not found: aider-chat The pip package failed due to PEP 668 environment restrictions in my WSL setup. Note: installing aider without -chat pulls an unrelated library — the correct package is aider-chat . Aider remains one of the most starred AI coding tools on GitHub 29k+ stars , and users consistently report it produces the highest-quality multi-file edits of any CLI tool. /voice mode for hands-free coding| Feature | GitHub Copilot | Claude Code | Cursor | Windsurf | Aider | |---|---|---|---|---|---| Type | IDE Extension | Terminal CLI | GUI IDE | GUI IDE | Terminal CLI | Free tier | ✅ Yes | ❌ No | ✅ Limited | ✅ Limited | ✅ API only | Paid starts at | $10/mo | Pay-per-use | $20/mo | $15/mo | ~$5–20/mo API | Inline completions | ⭐⭐⭐⭐⭐ | ❌ N/A | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐ | ❌ N/A | Multi-file agent | ⭐⭐⭐ | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐ | ⭐⭐⭐⭐⭐ | IDE integration | VS Code, JB, NeoVim | Terminal only | VS Code fork | Standalone | Terminal only | Open-source | ❌ | ❌ | ❌ | ❌ | ✅ | Local models | ❌ | ❌ | Limited | ❌ | ✅ Ollama | Git integration | Basic | ✅ | ✅ | ✅ | ⭐⭐⭐⭐⭐ | Best for | Daily typing | Complex tasks | Full workflow | Flow-based dev | Budget + control | You want the best inline completions that just work. Copilot's tab-complete is still the fastest way to write boilerplate, fill in patterns, and reduce keyboard mileage. The free tier is genuinely useful, and at $10/month it's the safest bet for most developers. Pair it with something else for complex agent tasks. You work in the terminal, need an autonomous agent that understands your entire codebase, and don't mind pay-per-use pricing. It's the most capable CLI agent available — especially for large refactors, debugging sessions, and complex feature builds. A budget cap $200/month Max plan prevents surprises. You want the best all-in-one AI coding experience. Cursor's Composer + Agent mode is the closest thing to "describe a feature and watch it get built." The Tab predictions are arguably better than Copilot's. At $20/month it's the premium option, but it replaces both Copilot and Claude Code for most workflows. You like the idea of Cursor but want a more "flowy" experience and slightly lower price. Cascade's continuous-awareness paradigm feels different — more proactive, less back-and-forth. The Memories feature genuinely improves over time. At $15/month it undercuts Cursor. You want maximum control, zero subscriptions, and don't mind the terminal. Aider with Claude 3.5 Sonnet produces some of the highest-quality code edits I've seen. It's open-source, works with local models via Ollama privacy bonus , and its git workflow is the cleanest of any tool here. If you're comfortable in the terminal, this is the budget-power-user sweet spot. After 30 days, here's what I landed on: npx for one-off terminal tasks, large refactors, and when I'm working over SSHTotal monthly cost: $20 Cursor Pro + ~$10 Anthropic API = ~$30/month. Your mileage will vary. None of these tools are magic. They all: But when used correctly — as accelerators, not replacements — they genuinely 2–3x coding speed on many tasks. The real skill is learning when to trust the AI and when to take over yourself. That's the part no tool can do for you. Last updated: May 2026. Pricing current as of publication date. Tested on WSL/Linux with Node.js v24.16.0 and Python 3.14.