Codex combines local and cloud development surfaces in the OpenAI ecosystem; Antigravity CLI is Google's current terminal agent and the migration destination for Gemini CLI users.
Codex may fit teams already using ChatGPT workspace access, Codex cloud tasks, or OpenAI-centered code review workflows.
Antigravity CLI may fit teams standardizing on Google's agent platform, Google Cloud access, or a Gemini CLI migration path.
Historical Gemini CLI quotas should not be treated as Antigravity pricing, and Codex plan inclusion should not be treated as unlimited usage.
Workflow guidance is separated from official product facts and should be tested on representative repository work.
| Decision area | Codex | Antigravity CLI |
|---|---|---|
| Product lifecycle | Current OpenAI coding-agent product. | Current Google terminal agent replacing consumer Gemini CLI paths. |
| Terminal workflow | CLI is one of several connected Codex surfaces. | Terminal experience connected to the broader Antigravity agent platform. |
| Background work | Cloud tasks and parallel app workflows are documented. | Concurrent background agent sessions are a documented product focus. |
| Account path | ChatGPT plan and workspace eligibility. | Consumer, business, or Google Cloud access path. |
| Cost model | Plan limits plus token-based credits where eligible. | Account entitlement or Cloud-backed usage; no universal rate is tracked. |
| Migration friction | Higher when moving from Google-specific CLI configuration. | Official migration tooling exists for Gemini CLI users. |
Do not select an agent from subscription price or repository popularity alone.