Compare
Gemini CLI vs Claude API
Side-by-side comparison of Gemini CLI 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 | Gemini | Claude API |
|---|---|---|
| Vendor | Anthropic | |
| Native SKILL.md support | Via compatibility layer | Yes |
| Verified skills indexed | 5 | 13 |
| Install model | Local folder | POST /v1/skills |
| Shell / Bash access | Yes | Sandboxed |
| Tagline | Google's coding agent CLI with a SKILL.md compatibility layer. | Claude API + Skills SDK. Pre-built skill_id values plus custom uploads via /v1/skills. |
Both
2
Skills verified to work on both Gemini and Claude API.
Only Gemini
3
Indexed for Gemini CLI but not yet verified on Claude API.
Only Claude API
11
Indexed for Claude API but not yet verified on Gemini CLI.
Verdict
Which should you pick?
Claude API is the deeper SKILL.md target — native support, the broadest verified skill ecosystem, and the closest fit for skill-driven workflows. Gemini CLI works well when you are already invested in the Google ecosystem or need its specific integrations.
Many teams use both — Skills with the SKILL.md spec are portable, and 2 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 Gemini CLI · Skills for Claude API.
FAQ
Common questions
Which is better for SKILL.md skills, Gemini CLI or Claude API?
Claude API has native SKILL.md support; Gemini CLI uses a compatibility layer. Gemini CLI has 5 verified skills indexed here; Claude API has 13. 2 skills work on both.
Can I use the same Skill on Gemini CLI and Claude API?
2 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 Gemini CLI?
Drop the folder under `~/.gemini/skills/` for user-wide or `.gemini/skills/` for project-scoped. The compatibility layer translates SKILL.md frontmatter automatically.
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?
If native SKILL.md support and the broadest skill ecosystem matter most, pick Claude API. Gemini CLI works for teams already invested in that platform.
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