Compare
Antigravity IDE vs Codex CLI
Side-by-side comparison of Antigravity IDE and Codex CLI for SKILL.md agent skills — install model, shell access, native support, skill count and best use cases.
Comparison
At a glance
| Dimension | Antigravity | Codex |
|---|---|---|
| Vendor | Antigravity | OpenAI |
| Native SKILL.md support | Yes | Yes |
| Verified skills indexed | 35 | 45 |
| Install model | Local folder | Local folder |
| Shell / Bash access | Yes | Yes |
| Tagline | Antigravity IDE ships with the awesome-skills bundle (1,234+ pre-installed) out of the box. | OpenAI's coding agent CLI. Adopted the SKILL.md spec verbatim in Dec 2025. |
Both
14
Skills verified to work on both Antigravity and Codex.
Only Antigravity
21
Indexed for Antigravity IDE but not yet verified on Codex CLI.
Only Codex
31
Indexed for Codex CLI but not yet verified on Antigravity IDE.
Verdict
Which should you pick?
Both support SKILL.md natively, so the choice is about ecosystem fit. Pick Antigravity IDE for Antigravity integrations and the workflows it makes easiest; pick Codex CLI for OpenAI integrations and its specific surface.
Many teams use both — Skills with the SKILL.md spec are portable, and 14 of the skills indexed here are verified on both agents. Browse the per-agent rankings to see which Skills lead on each platform: Skills for Antigravity IDE · Skills for Codex CLI.
FAQ
Common questions
Which is better for SKILL.md skills, Antigravity IDE or Codex CLI?
Both support SKILL.md natively. Antigravity IDE has 35 verified skills indexed here; Codex CLI has 45. 14 skills work on both.
Can I use the same Skill on Antigravity IDE and Codex CLI?
14 of the skills indexed here work on both. The SKILL.md spec is shared, so most skills run cleanly on both — the exceptions are skills that depend on agent-specific tools (Bash, Workflows, MCP patterns).
How do I install a Skill on Antigravity IDE?
1,234+ as of the latest release. The bundle covers document processing, code quality, security, design, marketing, data and more — most users find what they need without installing anything.
How do I install a Skill on Codex CLI?
Drop the Skill folder under `~/.codex/skills/` for user-wide or `.codex/skills/` for project-scoped. Codex loads SKILL.md the same way Claude Code does.
Which agent should I pick for cross-platform skill use?
Both support skills natively. Pick by ecosystem fit: Antigravity IDE for Antigravity customers, Codex CLI for OpenAI customers.
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