Google Antigravity vs OpenAI Codex CLI — Which AI Agent Is Better?
An in-depth comparison of Google Antigravity and OpenAI Codex CLI across output quality, autonomy, reliability, speed, value, and ease of use. Vote for your favorite.
An in-depth comparison of Google Antigravity and OpenAI Codex CLI across output quality, autonomy, reliability, speed, value, and ease of use. Vote for your favorite.
Pick a winner in each category — you can change your vote anytime.
AntigravityCodexChoose Google Antigravity if you are developers who want to try the most agentic IDE experience available today. Choose OpenAI Codex CLI if you are chatGPT subscribers who want a capable terminal agent at no extra cost.
Editorially this matchup is a dead heat: each agent leads in 2 of our six categories. On price, Google Antigravity runs free public preview and is proprietary; OpenAI Codex CLI runs included with chatgpt plans / api and is open source.
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Weighing the cost of running it? Compare API plans for Codex
Antigravity is Google's agentic development platform, launched alongside Gemini 3: a VS Code-style IDE where an agent manager dispatches agents that work across the editor, terminal, and a Chrome browser they control — producing verifiable artifacts (plans, screenshots, browser recordings) as they go. The free public preview and Gemini 3 Pro quality made it an instant heavyweight, but it's still early: capacity limits, preview rough edges, and early prompt-injection concerns around the browser-control surface mean production teams should keep a human on the loop.
Codex CLI is OpenAI's open-source coding agent for the terminal. It edits files, runs commands in a sandbox with configurable approval modes, and can hand longer tasks off to Codex cloud to run in the background. Usage is included with ChatGPT Plus/Pro plans, making it the default choice for developers already in the OpenAI ecosystem.
OpenAI Codex CLI runs on Standard Compute
