- Best overall: Claude. Claude Pro ($20/month) includes Claude Code, and Anthropic’s new Sonnet 5.5 and Opus 5.5 post the strongest coding scores Anthropic has published.
- Best value inside your editor: GitHub Copilot. Pro is $10/month and now lets you use the Claude Code and Codex agents from inside Copilot. There is a free plan too.
- Best if you already pay for ChatGPT: Codex. Plus ($20/month) includes expanded Codex use, now running OpenAI’s GPT-6.1 Sol.
- Cursor changed hands: SpaceX bought it in August, and its new plans run from $8 (Grok models only) to $200 a month.
- Free options exist: GitHub Copilot Free, ChatGPT’s free plan (limited Codex), and local models through Ollama.
“Which AI is best for coding?” now has two parts: which tool you work in (an editor plug-in, an AI editor, a terminal agent or a chat window) and which model does the thinking underneath. This guide answers both for October 2026, using each company’s own pricing pages and published results. If you are new to programming, the short version is at the end.
The best AI coding tools at a glance
| Tool | What it is | Free option | Main paid plan |
|---|---|---|---|
| Claude Code (Anthropic) | Agent that works in your terminal and editor | No (Claude’s free plan does not include it) | Claude Pro, $20/month ($17 yearly) |
| GitHub Copilot | Plug-in for VS Code, JetBrains, Xcode and more, plus cloud agent | Yes, 2,000 completions/month | Pro, $10/month |
| Codex (OpenAI) | Coding agent in ChatGPT, the desktop app and the terminal | Limited, in ChatGPT’s free plan | ChatGPT Plus, $20/month |
| Cursor (SpaceXAI) | AI-first code editor | Yes, limited | Premium, $30/month |
| Gemini and Antigravity (Google) | Chat assistant plus Google’s agent-based development platform | Yes (Gemini) | Google AI Pro, $19.99/month (US) |
| Local models (Ollama, LM Studio) | Open models running on your own computer | Free | None — you need a capable GPU |
The models doing the work
Most tools let you choose the model, and the model matters more than the logo on the app. These are the latest coding results each company has published about its own models — treat them as marketing until independent tests confirm them, and note that each company uses different tests.
| Model | Released | What the maker reports | API price (input / output per 1M tokens) |
|---|---|---|---|
| Claude Sonnet 5.5 | 28 Sep 2026 | Terminal-Bench 4.0: 70.6%; CursorBench 4.0: 55.5% | $2 / $10 |
| Claude Opus 5.5 | 22 Sep 2026 | Terminal-Bench 4.0: 66.4%; CursorBench 4.0: 57.8%; FrontierCode 1.1: 54.4% | $4 / $20 |
| GPT-6.1 Sol | 29 Sep 2026 | Matches GPT-6 Astra on DeepSWE v1.1 at about a fifth of the cost | $2 / $10 |
| Gemini 4 Argon | Announced 30 Sep 2026 | DeepSWE v1.1: 77.9% — not yet publicly available | $2 / $10 introductory |
Sources: Anthropic, OpenAI and Google. All three of the available models cost about the same for developers; compare them on your own code in the Gemini 4 Argon vs GPT-6.1 Sol vs Claude Sonnet 5.5 comparison, and estimate a monthly bill with the AI API cost calculator.
1. Claude and Claude Code — best overall
Claude is the assistant many professional developers reach for first, and Claude Code is its agent: it reads your project, edits files across it, runs commands and tests, and explains what it did. Anthropic’s pricing page lists Claude Code on Pro ($20/month, or $17/month billed yearly) and on the Max plans (from $100/month) for heavy use; the free plan includes chat and running code, but not Claude Code.
The new Sonnet 5.5 is the everyday model: Anthropic reports 70.6% on Terminal-Bench 4.0, up from 10.3% for Sonnet 5, at half the API price of Opus. Opus 5.5 remains the choice for large, messy problems that need careful judgment. Choose Claude if you want the strongest agent for real projects and are comfortable working in a terminal or editor.
2. GitHub Copilot — best value inside your editor
Copilot lives inside the editors most people already use — VS Code, Visual Studio, JetBrains IDEs, Xcode, Neovim and more — and suggests code as you type, answers questions and runs agents. GitHub’s plan page lists:
- Free: 2,000 completions a month, smaller models such as Haiku 4.5 and GPT-5 mini, and Copilot CLI. No credit card needed; verified students get a free Student plan.
- Pro, $10/month: unlimited completions, the cloud agent and code review, model selection, and access to third-party agents — Claude Code and Codex — with $15 of monthly credits.
- Pro+, $39/month: premium models including Opus and four times Pro’s included usage. Max, $100/month for sustained agent work.
Choose Copilot if you want AI inside your existing editor for the lowest price, or want to try several agents under one subscription.
3. Codex — best if you already pay for ChatGPT
OpenAI’s Codex is a coding agent available in ChatGPT, the desktop app and the terminal. According to OpenAI’s pricing page, the free plan includes limited Codex access, Plus ($20/month) expands it, and Pro (from $100/month) offers longer Codex sessions. Its newest model, GPT-6.1 Sol, is available in Codex to paid plans; OpenAI says it matches GPT-6 Astra on its DeepSWE coding test at about a fifth of the price. Choose Codex if you already pay for ChatGPT and want coding help without another subscription. See also our DevDay report.
4. Cursor — the AI editor, now part of SpaceXAI
Cursor is an AI-first code editor built on VS Code, and it changed a lot this year: SpaceX completed its $60 billion purchase of Cursor in August and folded it into its SpaceXAI unit, alongside the Grok models. Cursor’s current pricing page shows plans bundled with X features: Plus at $8/month (Grok models only), Premium at $30/month (latest Grok models, cloud agents and third-party models such as Claude and GPT at API list price, billed separately), and Super ($100) and Ultra ($200) for heavy use. Choose Cursor if you want an editor designed around AI from the ground up — but check what your plan includes, because non-Grok models now cost extra.
5. Gemini and Google Antigravity
Google’s free Gemini app is a capable coding chat assistant, and Google AI Pro ($19.99/month in the US) adds basic usage of Google Antigravity, Google’s agent-based development platform, according to Google’s plan page; AI Ultra raises the limits. Google’s most capable coding model, Gemini 4 Argon, is announced but not yet released to the public. Choose Gemini if you already pay for Google AI or work mainly in Google’s ecosystem.
6. Free and private: run a model on your own computer
If you do not want your code to leave your machine, run an open model locally with Ollama or LM Studio and connect it to your editor. Local models are weaker than the best cloud models on hard tasks, but they are free, private and work offline. Our guide to the best local LLMs for coding covers which ones fit your GPU.
Which AI should you use for coding?
- You are learning to code: start free with ChatGPT or Gemini to explain code, then add GitHub Copilot Free in VS Code. Students should check GitHub’s free Student plan.
- You code every day and want the best results: Claude Pro with Claude Code, or GitHub Copilot Pro+ if you prefer working inside your editor.
- You want the lowest price: GitHub Copilot Pro at $10 a month, which also gives you the Claude Code and Codex agents.
- You already pay for ChatGPT: use Codex before buying anything else.
- Your code must stay private: a local model through Ollama or LM Studio.
Whatever you use, review the AI’s changes before you run or ship them. Coding agents can delete files, install packages and make confident mistakes. Keep your work in Git so you can undo anything. For the wider picture of agent tools, see the best AI coding agents and agentic IDEs.
Frequently asked questions
What is the best AI for coding in 2026?
For most developers, Claude with Claude Code (included in Claude Pro at $20 a month), using Anthropic’s new Sonnet 5.5 and Opus 5.5 models. GitHub Copilot is the best value at $10 a month, and Codex is the natural choice for ChatGPT Plus subscribers.
What is the best free AI for coding?
GitHub Copilot Free (2,000 completions a month in your editor), ChatGPT’s free plan with limited Codex access, and the free Gemini app. For unlimited free use, run an open model locally with Ollama or LM Studio.
Is Claude or ChatGPT better for coding?
Both are strong and cost the same at $20 a month. Many developers prefer Claude and Claude Code for larger projects; OpenAI says its new GPT-6.1 Sol matches its flagship GPT-6 Astra on coding at a fraction of the cost. Try both on your own code.
Is GitHub Copilot worth it?
At $10 a month, Copilot Pro is the cheapest way to get unlimited completions, a cloud agent and code review in your editor, and it now includes access to the Claude Code and Codex agents. For most developers who code regularly, yes.
What happened to Cursor?
SpaceX completed its purchase of Cursor in August 2026 and merged it into its SpaceXAI division with the Grok models. Cursor’s plans now start at $8 a month for Grok models only, with other models such as Claude and GPT billed separately on higher plans.