Best for · verified Nov 2, 2026

Best free AI coding agent

You want an agent that writes and edits code without paying. These have real free tiers or are free and open source. You may still pay for model API usage on bring-your-own-key tools.

Short answer: OpenCode. Free to use, with free models included and no account needed.

  1. OpenCode

    Free to use, with free models included and no account needed.

    Free tier: Yes. "100% free to use", including free models usable without an account.
    Paid: None. You pay only if you connect a paid provider.

  2. GitHub Copilot

    Copilot Free gives 2,000 completions a month, and verified students get Copilot Student free.

    Free tier: Yes. Copilot Free (2,000 completions/mo, auto model selection). Copilot Student is free for verified students.
    Paid: Pro $10/mo (1,500 AI credits), Pro+ $39/mo (7,000), Max $100/mo (20,000). Business $19/seat, Enterprise $39/seat.

  3. Devin (Desktop & Cloud)

    The free tier includes unlimited Tab completions and a light agent quota.

    Free tier: Yes. Light agent quota, unlimited inline edits and Tab completions.
    Paid: Pro $20/mo (includes Devin Cloud access), Max $200/mo. Teams: $80/mo plus $40/mo per full dev seat.

  4. Google Antigravity

    $0 individual tier for an agent-first IDE and CLI.

    Free tier: Yes, $0/month individual tier.
    Paid: Team plans start at $30 USD per seat per month. A consumption-based option with a $0 seat fee is also listed.

  5. OpenAI Codex

    Limited Codex access on ChatGPT Free.

    Free tier: Yes, limited Codex access on ChatGPT Free.
    Paid: Included with ChatGPT Go ($8/mo), Plus ($20/mo) and Pro ($100, $200 or $500/mo). Business is $20/user/mo billed annually ($25 monthly).

  6. Cline

    Free open-source extension; you pay only for inference.

    Free tier: Yes. The extension is free for individual developers.
    Paid: Pay only for AI inference, usage-based. No subscription required.

FAQ

What is the best free ai coding agent?

Our top pick is OpenCode: Free to use, with free models included and no account needed.

Why consider GitHub Copilot?

Copilot Free gives 2,000 completions a month, and verified students get Copilot Student free.

Why consider Devin (Desktop & Cloud)?

The free tier includes unlimited Tab completions and a light agent quota.

Why consider Google Antigravity?

$0 individual tier for an agent-first IDE and CLI.