Best Claude Code Alternatives in 2026
The best alternatives to Claude Code, including Codex CLI, Antigravity CLI, OpenCode, GitHub Copilot CLI, Amp, and Cursor CLI, compared by models, pricing, and license, plus how to run several side by side.
Claude Code is Anthropic's coding agent. It has the widest range of parallel modes of any agent, with subagents, /batch runs across worktrees, cloud sessions, and Remote Control, but it needs a paid Claude plan or an API key and runs only Anthropic's models. Other strong agents now exist, and the best one for a task can change from one release to the next. Paradev lets you keep Claude Code and run any of these alternatives beside it, each in its own Git worktree, so you can compare the diffs on your own code.
Our recommendation: keep Claude Code, and use Paradev to try the alternatives side by side on the same task. The list below covers the agents worth trying, from free and open-source options to other labs' agents.
Download Paradev to run two agents on one task, or read Paradev vs Claude Code for how the two fit together. This guide is published by Paradev; recommendations describe workflow fit rather than benchmark results.
The Short Version
| Alternative | Best for | Models | How you pay | License |
|---|---|---|---|---|
| Codex CLI | Open-source agent from a major lab | OpenAI GPT models | ChatGPT plans, including limited use on Free, or API key | Open source (Apache-2.0) |
| Antigravity CLI | Free start with strong models | Gemini, plus Claude and gpt-oss | Free with weekly limits; Google AI Pro and Ultra; API key | Proprietary |
| OpenCode | Open-source agent for any model | Any provider | Free; your own keys, or OpenCode Zen and Go | Open source (MIT) |
| GitHub Copilot CLI | GitHub-centric teams, several vendors' models | Claude, GPT, Gemini, Grok, Kimi | Free tier; Pro $10, Pro+ $39, Max $100/mo | Proprietary |
| Amp | Letting the vendor pick the model | Several, chosen by mode | Free with your own compute and keys; Individual $20/mo | Proprietary |
| Cursor CLI | Cursor users who want a terminal agent | Cursor's model list | Cursor plans, free tier included | Proprietary |
| Paradev | Running Claude Code and these agents side by side | Whatever each agent uses | Free tier; Pro $20, Team $60, Ultra $200 per user/month | Source-available (ELv2) |
Why Look for a Claude Code Alternative?
Claude Code is strong for deep, multi-step work. Common reasons to look further:
- Cost. There is no free tier, and Anthropic warns that parallel runs multiply token use.
- Models. You want GPT, Gemini, open-weight, or local models.
- Open source. You want an agent you can read and change.
- A second opinion. A different agent often solves the task Claude Code is stuck on.
- Vendor risk. You do not want your whole workflow to depend on one lab.
The Best Alternatives
Codex CLI
OpenAI's agent is open source under Apache-2.0 and comes with ChatGPT plans, so one subscription covers the CLI, the IDE extension, the ChatGPT desktop app, cloud tasks, and code review. It has subagents, worktrees, codex exec for CI, an SDK, and a GitHub Action. It is the closest like-for-like alternative to Claude Code.
See Claude Code vs Codex and Paradev vs Codex.
Antigravity CLI
Google's agy shares its agent harness with the Antigravity desktop app, runs async subagents that can each take a worktree, and is free with weekly limits. It includes Gemini, Claude, and gpt-oss models, so it is the cheapest way to keep using Claude models in a different agent.
See Claude Code vs Antigravity CLI and Paradev vs Google Antigravity.
OpenCode
OpenCode is the most popular open-source agent with free choice of provider. It has a terminal UI, a desktop app, an IDE extension, built-in subagents, and a server with an SDK. It is MIT-licensed and free; you pay only for the models.
See Claude Code vs OpenCode and Paradev vs OpenCode.
GitHub Copilot CLI
Copilot's terminal agent offers models from several vendors, including Claude, on one plan, starting with a free tier. Issues, pull requests, and the GitHub MCP server are built in, and /delegate hands work to Copilot's cloud agent.
See Claude Code vs Copilot CLI and Paradev vs GitHub Copilot.
Amp
Amp picks models for you by mode, runs work on "orbs," cloud machines that keep going after you close your laptop, and runners that create Git worktrees. It is free with your own compute and keys, and since October 2026 it can use a Claude Pro or Max plan.
See Claude Code vs Amp and Paradev vs Amp.
Cursor CLI
Cursor's terminal agent shares worktrees, rules, and MCP config with the Cursor editor and its Cloud Agents. Choose it if you already pay for Cursor.
See Claude Code vs Cursor CLI and Paradev vs Cursor.
Paradev (to run them all)
Paradev is not an agent. It is a desktop workspace that runs Claude Code and every agent above, each in its own Git worktree and terminal, on your own subscriptions and keys; Paradev never proxies model calls. Give the same prompt to Claude Code and Codex in two workspaces, review both diffs in the Changes pane, preview the result in the in-app browser, and open a PR from the better one. You can also continue a stuck session with a different agent, schedule agents as automations, and check on them from the iPhone and iPad app.
How To Choose
- For the closest like-for-like agent from another lab, choose Codex CLI.
- For a free start that still includes Claude models, choose Antigravity CLI.
- For open source with any model, choose OpenCode.
- For GitHub-centric teams on one low-cost plan, choose Copilot CLI.
- To let the vendor pick the model, choose Amp.
- To compare any of them with Claude Code on your own repository, use Paradev.
Verdict
There is no single best agent; each one is strongest on its own vendor's models. You do not have to give up Claude Code to try another. Run Claude Code and one alternative on the same task in Paradev, compare the diffs, and keep whichever works best for each kind of task. For the full agent comparison, see Best Coding Agents.
What To Try First
- Keep Claude Code: launch it in a Paradev workspace.
- Add an alternative: start a second workspace from the same branch with Codex or OpenCode.
- Give both the same prompt: each agent works in its own worktree.
- Compare: review both diffs, run your checks, and open a PR from the better one.
Download Paradev, then follow How to Compare Coding Agents Side by Side.
Frequently Asked Questions
What is the best Claude Code alternative?
Codex CLI is the closest like-for-like alternative: an open-source agent from a major lab with subagents, worktrees, and cloud tasks. OpenCode is the best open-source option for any model, and Antigravity CLI is the best free start.
Is there a free Claude Code alternative?
Yes. Antigravity CLI is free with weekly limits, Copilot CLI has a free tier, Codex includes limited use on ChatGPT Free, and OpenCode and Amp are free with your own model keys.
Is there an open-source Claude Code alternative?
Yes. Codex CLI (Apache-2.0) and OpenCode (MIT) are open source. Claude Code is proprietary.
Can I use Claude Code and an alternative together?
Yes. Paradev runs Claude Code and other CLI agents side by side, each in its own Git worktree, so they cannot overwrite each other's files. You pay each provider for its own usage.