Compare
Antigravity IDE vs Claude API
Side-by-side comparison of Antigravity IDE and Claude API for SKILL.md agent skills — install model, shell access, native support, skill count and best use cases.
Comparison
At a glance
| Dimension | Antigravity | Claude API |
|---|---|---|
| Vendor | Antigravity | Anthropic |
| Native SKILL.md support | Yes | Yes |
| Verified skills indexed | 35 | 13 |
| Install model | Local folder | POST /v1/skills |
| Shell / Bash access | Yes | Sandboxed |
| Tagline | Antigravity IDE ships with the awesome-skills bundle (1,234+ pre-installed) out of the box. | Claude API + Skills SDK. Pre-built skill_id values plus custom uploads via /v1/skills. |
Both
3
Skills verified to work on both Antigravity and Claude API.
Only Antigravity
32
Indexed for Antigravity IDE but not yet verified on Claude API.
Only Claude API
10
Indexed for Claude API 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 Claude API for Anthropic integrations and its specific surface.
Many teams use both — Skills with the SKILL.md spec are portable, and 3 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 Claude API.
FAQ
Common questions
Which is better for SKILL.md skills, Antigravity IDE or Claude API?
Both support SKILL.md natively. Antigravity IDE has 35 verified skills indexed here; Claude API has 13. 3 skills work on both.
Can I use the same Skill on Antigravity IDE and Claude API?
3 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 Claude API?
POST your Skill zip to /v1/skills. You receive a skill_id. Reference it in your messages request — the model loads the Skill on demand.
Which agent should I pick for cross-platform skill use?
Both support skills natively. Pick by ecosystem fit: Antigravity IDE for Antigravity customers, Claude API for Anthropic customers.
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