Best Free OpenAI Codex CLI Alternatives
30 alternatives to OpenAI Codex CLI with a free plan or free tier, ranked by how closely they match. The percentage is a match score, not a popularity score.
Replacing: OpenAI Codex CLI — OpenAI Codex CLI brings the Codex coding agent to the terminal and to scripts.Input: text, images, code · Output: code
1
AI pair programming in your terminal
Input: text, images, audio, code, web pages · Output: code
Free plan
93%Near drop-in replacement · same core category as OpenAI Codex CLI
00
How the score adds up
- Same core category55/55
- Covers OpenAI Codex CLI's goals25/25
- Feature description similarity13/20
Shared goals 1 of the 1 we tag OpenAI Codex CLI for
Coding
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
2
It can query and edit large codebases, generate new apps from PDFs, images, or sketches using multimodal input, and debug problems when you describe them in plain language.
Input: text, images, documents, code · Output: code
Free plan
100%Near drop-in replacement · same core category as OpenAI Codex CLI
00
How the score adds up
- Same core category55/55
- Covers OpenAI Codex CLI's goals25/25
- Feature description similarity20/20
Shared goals 1 of the 1 we tag OpenAI Codex CLI for
Coding
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
3
Writing code means constantly jumping between your editor and browser tabs stuffed with documentation
Input: text, code · Output: code
Free planFrom $15/mo
90%Near drop-in replacement · same core category as OpenAI Codex CLI
00
How the score adds up
- Same core category55/55
- Covers OpenAI Codex CLI's goals25/25
- Feature description similarity10/20
Shared goals 1 of the 1 we tag OpenAI Codex CLI for
Coding
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
4
opcode is a free, open-source desktop application that gives Anthropic's command-line coding agent a graphical interface.
Input: text, code · Output: code
Free plan
96%Near drop-in replacement · same core category as OpenAI Codex CLI
00
How the score adds up
- Same core category55/55
- Covers OpenAI Codex CLI's goals25/25
- Feature description similarity16/20
Shared goals 1 of the 1 we tag OpenAI Codex CLI for
Coding
Also tagged for
Software Development
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
5
Qwen Code is an open-source AI coding agent that lives in the terminal and also runs in editors, a desktop app, a Web UI and chat apps.
Input: text, code · Output: code
Free planAPITeams
96%Near drop-in replacement · same core category as OpenAI Codex CLI
00
How the score adds up
- Same core category55/55
- Covers OpenAI Codex CLI's goals25/25
- Feature description similarity16/20
Shared goals 1 of the 1 we tag OpenAI Codex CLI for
Coding
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
6
OpenCode is an open-source AI coding agent that helps developers write code in the terminal, an IDE or a desktop app.
Input: text, code · Output: code
Free plan
96%Near drop-in replacement · same core category as OpenAI Codex CLI
00
How the score adds up
- Same core category55/55
- Covers OpenAI Codex CLI's goals25/25
- Feature description similarity16/20
Shared goals 1 of the 1 we tag OpenAI Codex CLI for
Coding
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
7
Your AI pair programmer that actually knows the codebase
Input: text, code · Output: code
Free planFrom $4/mo
88%Strong alternative · same core category as OpenAI Codex CLI
00
How the score adds up
- Same core category55/55
- Covers OpenAI Codex CLI's goals25/25
- Feature description similarity8/20
Shared goals 1 of the 1 we tag OpenAI Codex CLI for
Coding
Also tagged for
Code ReviewAI Agents
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
8
Google Antigravity assumes you already think in agent-driven workflows
Input: text, code · Output: code, apps
Free plan
88%Strong alternative · same core category as OpenAI Codex CLI
00
How the score adds up
- Same core category55/55
- Covers OpenAI Codex CLI's goals25/25
- Feature description similarity8/20
Shared goals 1 of the 1 we tag OpenAI Codex CLI for
Coding
Also tagged for
AI Agents
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
9
Code editor that actually understands your codebase
Input: text, code · Output: code
Free planFrom $20/mo
88%Strong alternative · same core category as OpenAI Codex CLI
00
How the score adds up
- Same core category55/55
- Covers OpenAI Codex CLI's goals25/25
- Feature description similarity8/20
Shared goals 1 of the 1 we tag OpenAI Codex CLI for
Coding
Also tagged for
Code Review
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
10
Verdent AI operates as a multi-agent coding system where several AI assistants work in parallel rather than sequentially
Input: text, code · Output: code, apps
Free planFrom $5/mo
87%Strong alternative · same core category as OpenAI Codex CLI
00
How the score adds up
- Same core category55/55
- Covers OpenAI Codex CLI's goals25/25
- Feature description similarity7/20
Shared goals 1 of the 1 we tag OpenAI Codex CLI for
Coding
Also tagged for
Code Review
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
11
Developers lose 30 seconds each time they switch AI providers or undo a bad code suggestion
Input: text, code · Output: code
Free planFrom $12/mo
90%Near drop-in replacement · same core category as OpenAI Codex CLI
00
How the score adds up
- Same core category55/55
- Covers OpenAI Codex CLI's goals25/25
- Feature description similarity10/20
Shared goals 1 of the 1 we tag OpenAI Codex CLI for
Coding
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
12
86%Strong alternative · same core category as OpenAI Codex CLI
00
How the score adds up
- Same core category55/55
- Covers OpenAI Codex CLI's goals25/25
- Feature description similarity6/20
Shared goals 1 of the 1 we tag OpenAI Codex CLI for
Coding
Also tagged for
Code ReviewAI Agents
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
13
Over a million developers already use Qoder
Input: text, images, code · Output: code
Free planFrom $20/mo
86%Strong alternative · same core category as OpenAI Codex CLI
00
How the score adds up
- Same core category55/55
- Covers OpenAI Codex CLI's goals25/25
- Feature description similarity6/20
Shared goals 1 of the 1 we tag OpenAI Codex CLI for
Coding
Also tagged for
AI Agents
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
14
Windsurf, which now appears on the web as Devin Desktop, is a desktop code editor that doubles as a control room for coding agents.
Input: text, code · Output: code
Free planFrom $20/moAPITeams
88%Strong alternative · same core category as OpenAI Codex CLI
00
How the score adds up
- Same core category55/55
- Covers OpenAI Codex CLI's goals25/25
- Feature description similarity8/20
Shared goals 1 of the 1 we tag OpenAI Codex CLI for
Coding
Also tagged for
AI Agents
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
15
86%Strong alternative · same core category as OpenAI Codex CLI
00
How the score adds up
- Same core category55/55
- Covers OpenAI Codex CLI's goals25/25
- Feature description similarity6/20
Shared goals 1 of the 1 we tag OpenAI Codex CLI for
Coding
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
16
Kilo Cloud Agents lets you code from anywhere—no local environment setup required
Input: text, code · Output: code
Free planFrom $15/mo
86%Strong alternative · same core category as OpenAI Codex CLI
00
How the score adds up
- Same core category55/55
- Covers OpenAI Codex CLI's goals25/25
- Feature description similarity6/20
Shared goals 1 of the 1 we tag OpenAI Codex CLI for
Coding
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
17
Continue is an open-source AI coding agent that was built by a community of developers and has since been acquired by Cursor.
Input: text, code · Output: code
Free plan
86%Strong alternative · same core category as OpenAI Codex CLI
00
How the score adds up
- Same core category55/55
- Covers OpenAI Codex CLI's goals25/25
- Feature description similarity6/20
Shared goals 1 of the 1 we tag OpenAI Codex CLI for
Coding
Also tagged for
Code Review
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
18
You get code generated fast—no need to pick a single AI provider
Input: text, images, audio, code · Output: code
Free plan
88%Strong alternative · same core category as OpenAI Codex CLI
00
How the score adds up
- Same core category55/55
- Covers OpenAI Codex CLI's goals25/25
- Feature description similarity8/20
Shared goals 1 of the 1 we tag OpenAI Codex CLI for
Coding
Also tagged for
AI Agents
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
19
Terminal-first coders get a different kind of AI assistant here
Input: text, code · Output: code
Free plan
92%Near drop-in replacement · same core category as OpenAI Codex CLI
00
How the score adds up
- Same core category55/55
- Covers OpenAI Codex CLI's goals25/25
- Feature description similarity12/20
Shared goals 1 of the 1 we tag OpenAI Codex CLI for
Coding
Also tagged for
AI Agents
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
20
Kilo Code is an open source AI agent Visual Studio (VS) Code extension that focuses on enhancing the efficiency of coding. The tool can generate code, automate tasks, and offer practical suggestions.
Input: text, code · Output: code
Free planFrom $20/mo
88%Strong alternative · same core category as OpenAI Codex CLI
00
How the score adds up
- Same core category55/55
- Covers OpenAI Codex CLI's goals25/25
- Feature description similarity8/20
Shared goals 1 of the 1 we tag OpenAI Codex CLI for
Coding
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
21
AWS coding assistant formerly known as CodeWhisperer
Input: text, code · Output: code
Free planFrom $19/mo
84%Strong alternative · same core category as OpenAI Codex CLI
00
How the score adds up
- Same core category55/55
- Covers OpenAI Codex CLI's goals25/25
- Feature description similarity4/20
Shared goals 1 of the 1 we tag OpenAI Codex CLI for
Coding
Also tagged for
Code Review
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
22
85%Strong alternative · same core category as OpenAI Codex CLI
00
How the score adds up
- Same core category55/55
- Covers OpenAI Codex CLI's goals25/25
- Feature description similarity5/20
Shared goals 1 of the 1 we tag OpenAI Codex CLI for
Coding
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
23
AI coding agent for Jupyter notebooks that generates, executes, and explains data science code from natural language descriptions.
Input: text, data · Output: data, code
Free planFrom $20/mo
85%Strong alternative · same core category as OpenAI Codex CLI
00
How the score adds up
- Same core category55/55
- Covers OpenAI Codex CLI's goals25/25
- Feature description similarity5/20
Shared goals 1 of the 1 we tag OpenAI Codex CLI for
Coding
Also tagged for
Data Analytics
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
24
GoCodeo writes your code and deploys it to Vercel in one motion
Input: text, images, code · Output: code, apps
Free planFrom $9/mo
86%Strong alternative · same core category as OpenAI Codex CLI
00
How the score adds up
- Same core category55/55
- Covers OpenAI Codex CLI's goals25/25
- Feature description similarity6/20
Shared goals 1 of the 1 we tag OpenAI Codex CLI for
Coding
Also tagged for
App BuildingSoftware Testing
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
25
JetBrains AI Assistant brings AI chat, coding agents and code completion directly into JetBrains IDEs.
Input: text, code · Output: code
Free planFrom $8.33/moAPITeams
91%Near drop-in replacement · same core category as OpenAI Codex CLI
00
How the score adds up
- Same core category55/55
- Covers OpenAI Codex CLI's goals25/25
- Feature description similarity11/20
Shared goals 1 of the 1 we tag OpenAI Codex CLI for
Coding
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
26
Visual Studio Code is a free, open source code editor that runs on Windows, macOS and Linux and now includes built-in AI agents.
Input: text, code · Output: code
Free planAPITeams
91%Near drop-in replacement · same core category as OpenAI Codex CLI
00
How the score adds up
- Same core category55/55
- Covers OpenAI Codex CLI's goals25/25
- Feature description similarity11/20
Shared goals 1 of the 1 we tag OpenAI Codex CLI for
Coding
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
27
An AI coding assistant that works while you sleep sounds like science fiction, but Jules runs continuously in the cloud doing exactly that
Input: text, code · Output: code
Free planAPI
84%Strong alternative · same core category as OpenAI Codex CLI
00
How the score adds up
- Same core category55/55
- Covers OpenAI Codex CLI's goals25/25
- Feature description similarity4/20
Shared goals 1 of the 1 we tag OpenAI Codex CLI for
Coding
Also tagged for
AI Agents
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
28
AI that knows your codebase
Input: text, code · Output: code
Free planFrom $16,000/mo
84%Strong alternative · same core category as OpenAI Codex CLI
00
How the score adds up
- Same core category55/55
- Covers OpenAI Codex CLI's goals25/25
- Feature description similarity4/20
Shared goals 1 of the 1 we tag OpenAI Codex CLI for
Coding
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
29
An open-source IDE that puts AI at the center while giving you complete control over how it works
Input: text, code · Output: code
Free plan
85%Strong alternative · same core category as OpenAI Codex CLI
00
How the score adds up
- Same core category55/55
- Covers OpenAI Codex CLI's goals25/25
- Feature description similarity5/20
Shared goals 1 of the 1 we tag OpenAI Codex CLI for
Coding
Also tagged for
Software Development
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
30
84%Strong alternative · same core category as OpenAI Codex CLI
00
How the score adds up
- Same core category55/55
- Covers OpenAI Codex CLI's goals25/25
- Feature description similarity4/20
Shared goals 1 of the 1 we tag OpenAI Codex CLI for
Coding
Goal tags are curated and capped, not a full feature audit — a missing tag is not a missing feature.
Can it really replace OpenAI Codex CLI? Vote on each alternative — no account needed. Votes gently reorder the list; they never change the match score.
Missing an alternative? Suggest it
At a glance: top OpenAI Codex CLI alternatives
| Tool | Match | Input | Output | Pricing | Free plan | Rating | Category |
|---|---|---|---|---|---|---|---|
| Aider | 93% | text, images, audio, code, web pages | code | Free | Yes | — | AI Coding Assistant |
| Gemini CLI | 100% | text, images, documents, code | code | Free | Yes | — | AI Coding Assistant |
| Kimi Code | 90% | text, code | code | From $15/mo | Yes | — | AI Coding Assistant |
| opcode | 96% | text, code | code | Free | Yes | — | AI Coding Assistant |
| Qwen Code | 96% | text, code | code | Free | Yes | — | AI Coding Assistant |
| OpenCode | 96% | text, code | code | Free | Yes | — | AI Coding Assistant |
Frequently asked
What is the best free OpenAI Codex CLI alternative?
Aider (93% match) is the closest free alternative to OpenAI Codex CLI: AI pair programming in your terminal. Gemini CLI (100% match) and Kimi Code (90% match) come next.
How is the match percentage calculated?
It measures how much of OpenAI Codex CLI's job a tool can take over: shared core category, how many of the same use cases it covers and how similar its feature set is. Popularity and ratings never change the percentage; they only break ties in the order. Lists are recomputed nightly and reviewed by editors for the most-visited tools.
How this list is ranked
The match score measures how much of OpenAI Codex CLI's job each tool can take over: shared core category, how many of the same use cases it covers, and how similar its feature set is. Popularity and ratings do not change the score; they only break ties in the order.
Lists are recomputed nightly from the live catalog and reviewed by our editors for the most-visited tools. Sponsored placements are marked and sit outside the ranking.