AI coding assistants can explain code, help you debug and speed up projects — but many CS courses have strict AI rules for graded programming work. This guide compares the main options, their free plans and student offers, and where each falls short.
Check your course policy first. AI rules in CS courses vary a lot. For example, Harvard's CS50 allows its own AI tutor (the CS50 Duck) but prohibits third-party AI tools like ChatGPT and GitHub Copilot that suggest answers or lines of code. Read your syllabus, ask your instructor if it's unclear, and disclose AI use when required. Tools that explain concepts or give hints are usually safer than tools that write the code for you.
Prices and features as of November 2026 — check the official site for current details
Best for: code completion and chat inside VS Code and GitHub
GitHub Copilot is an AI pair programmer that suggests code as you type and answers questions in Copilot Chat inside editors like VS Code, on GitHub.com and in the terminal. Since March 2026, verified students get a free Copilot Student plan through GitHub Education, with unlimited code completions and a monthly allowance of AI credits for chat (automatic model selection only). Anyone can use Copilot Free (up to 2,000 completions a month with limited chat), and Copilot Pro costs $10/month.
Why students use it:
While this is our top recommendation based on accuracy and academic reliability, students should always verify results and use it as a learning aid rather than a replacement for coursework.
Best for: explaining concepts, debugging help and study mode
ChatGPT can explain algorithms and error messages, walk through code line by line, and quiz you with Study mode, which guides you with questions instead of handing over answers. It also includes Codex, OpenAI's coding agent — limited on the Free and Go plans and fully available on Plus. Plans: Free, Go ($8/month in the US), Plus ($20/month). Through October 31, 2026, eligible US college and graduate students could claim four free months of ChatGPT Plus after SheerID verification; that offer has now ended.
Why students use it:
Best for: reading and explaining longer code and project files
Anthropic's Claude is a general AI assistant that's popular for explaining and reviewing code. The free plan includes chat, web search, file creation, code execution and Artifacts. Claude Pro ($17/month billed annually or $20 billed monthly) adds Claude Code, Anthropic's coding agent, which shares your plan's usage limits.
Why students use it:
Best for: learning to code with AI hints instead of answers
Codecademy is an interactive coding course platform with built-in AI features: an AI Learning Assistant for explanations and feedback, AI project hints that don't reveal the full solution, doc tooltips, an interview simulator, and code autocomplete for HTML, CSS and JavaScript. Basic is free; Plus is $14.99/month and Pro $19.99/month billed annually ($29.99 and $39.99 billed monthly). Verified students can get over 35% off a Codecademy Pro student plan.
Why students use it:
Best for: AI-first code editor for bigger personal projects
Cursor is a code editor built around AI, with Tab completions, chat and an Agent that can make multi-file changes. The Free plan includes limited Agent use; paid plans start at $8/month (Plus), and Premium is $30/month. Cursor's student page currently lists no free student plan and suggests watching for campus and online promotions.
Why students use it:
Best for: looking up documentation and technical concepts with sources
Perplexity is an AI answer engine that searches the web and cites its sources, which is handy for checking documentation, comparing libraries or researching a CS topic. The free plan covers basic searches; Pro is $20/month, and verified students can get the discounted Education Pro plan (about $10/month) with Learn Mode and unlimited Pro searches.
Why students use it: