Kiro vs Google Antigravity
Compare the working environment, model access, capabilities and billing before choosing a tool.
Last verified: · How we verify
Kiro
Spec-driven development with requirements, tasks and agents.
Google Antigravity
Google’s agent platform spanning editor, terminal and browser.
| Decision | Kiro2026-09-21 | Google Antigravity2026-09-21 |
|---|---|---|
| Environment | AI-native IDE | AI-native IDE |
| Platforms | macOS, Windows, Linux, Web | macOS, Windows, Linux |
| Good starting point for | Projects where requirements and implementation tasks benefit from a written plan. | Developers exploring parallel agent tasks and browser-assisted development. |
| Pricing model | Subscription + work creditsPaid from $20/moOfficial pricing ↗ | Free tier + Google plan allowancesFree access; see limitsOfficial pricing ↗ |
| Free access | Available; limits apply | Available; limits apply |
| Model access | Hosted models with plan, regional and credit-multiplier restrictions. | Hosted Gemini and Claude models; the pricing page also lists gpt-oss, which is not treated as the GPT family here. |
| Agent workflow | Verified | Verified |
| CLI surface | Verified | Verified |
| MCP | Verified | Not verified |
| Skills | Not verified | Not verified |
| Rules / instructions | Verified | Not verified |
| Hooks | Verified | Not verified |
| Memory | Not verified | Not verified |
| Bring your own key | Not verified | Not verified |
| Local models | Not verified | Not verified |
| Cloud agents | Not verified | Not verified |
| Parallel agents | Not verified | Verified |
| Check before switching | Credits measure work rather than a fixed number of prompts. Model choice changes consumption. | Free access has rate limits. Paid benefits depend on your Google plan and account. |
Compare both tools on the same project
Use the same small repository task in both environments. Note setup time, review steps, the checks the agent ran and the usage charged. Keep the task, acceptance criteria and model choice as comparable as possible.
Choose based on the result and your existing tools. Published feature availability does not establish code quality, reliability or which product is faster on your codebase.