Google AntigravityvsKiro
Generated from the two spec rows. Green marks the better value where a spec has a clear direction. Everything else is just different.
Google Antigravity
Google · AI-native IDE
#68MCP
Panel
6.03 spec wins
- Reliability
- 5.3
- Usefulness
- 6.7
- Cost
- 6.2
- Longevity
- 5.8
“Google's own IDE ships Claude and gpt-oss next to Gemini, the most honest model review Google has ever published.”
Kiro
Amazon Web Services · AI-native IDE
#57MCP
Panel
6.51 spec wins
- Reliability
- 6.3
- Usefulness
- 6.7
- Cost
- 5.7
- Longevity
- 7.3
“Makes you write requirements, design and tasks before any code, so the credit meter starts running before the first line does.”
Spec by spec
| Spec | Google Antigravity | Kiro |
|---|---|---|
| Architecture | ||
| Category | AI-native IDE | AI-native IDE |
| Runs | local | local, cloud, sandbox |
| Platforms | macos, linux, windows | macos, linux, windows, web |
| Context window | not documented | not documented |
| Protocols | ||
| MCP client | Yes | Yes |
| MCP server | No | No |
| Capabilities | ||
| Runs terminal commands | Yes | Yes |
| Multi-file edits | Yes | Yes |
| Git operations | Yes | Yes |
| Browser control | YesA first-party browser subagent drives Chrome from a separate profile with allowlist/denylist controls (https://antigravity.google/docs/ide/browser/); IDE-side only, not in the agy CLI. | YesEvery Kiro Web sandbox ships a headless Chrome with Playwright MCP, the agent-browser CLI and the Chrome DevTools MCP server preinstalled; the local IDE and CLI have no built-in browser tool. |
| Sandboxed execution | YesOS-level isolation rather than containers: "no virtual machines or Docker images to manage" - Linux uses kernel namespaces to isolate the filesystem, hide host processes and cut networking; macOS uses sandbox-exec with Seatbelt (SBPL) profiles. | YesKiro Web runs each task in its own isolated execution environment with configurable access controls. |
| Multi-agent orchestration | Yes | Yes |
| Headless / CI mode | Yes | Yes |
| Models | ||
| Backbone | Gemini 3.1 Pro, Gemini 3.8 Flash, Claude Sonnet 4.6, Claude Opus 4.6, gpt-oss-120b | Claude, GPT, DeepSeek, Qwen, MiniMax, GLM |
| Bring your own model | YesSetting `modelProvider: "gemini"` in ~/.gemini/antigravity-cli/settings.json plus a GEMINI_API_KEY runs the CLI on your own key and billing instead of a signed-in Google account, and a model selector picks between Gemini, Claude and gpt-oss models in the IDE. | NoKiro exposes a picker over its own curated model list plus an Auto router; no custom base URL, Bedrock deployment or self-hosted endpoint is documented. |
| Local models | YesGOOGLE_GEMINI_BASE_URL sends model requests to any Gemini-compatible endpoint, so a self-hosted shim works as a mechanism; no Ollama or LM Studio integration is documented. | NoNo local or OpenAI-compatible endpoint is documented; only Kiro-hosted models are selectable. |
| Cost | ||
| Pricing model | mixed | mixed |
| Starts at | $20/mo | $20/mo |
| Free tier | Yes | Yes |
| Bring your own key | Yes | NoKIRO_API_KEY for headless runs is a Kiro platform token billed against Kiro credits, not your own provider or AWS account key. |
| Openness | ||
| Open source | No | No |
| License | proprietary | proprietary |
| GitHub stars | 2,446 | 4,343 |
Which one would each critic pick
| Critic | Google Antigravity | Kiro | Pick |
|---|---|---|---|
| El Juez | — | — | not enough reviews |
| El Amigo | 7.0 | 7.3 | Kiro — Pick Kiro if you want an agent that makes you write requirements and a design before it touches code, and accept that the bill is a credit meter you cannot route around with your own key. |
| El Crítico | 6.3 | 6.3 | no preference |
| El Profesor | 6.3 | 6.5 | Kiro — Kiro's spec-first pipeline is a principled ordering, requirements before design before tasks before code, but no benchmark and no published evaluation accompanies it. |
| La Inversora | 7.3 | 7.8 | Kiro — Kiro is AWS's entry, and the question is never whether AWS can fund it, only whether AWS keeps caring. |
| La Jefa | 5.3 | 7.0 | Kiro — SSO and centralized billing exist, steering files make rules enforceable, and the meter has an admin-controlled overage switch; approved with conditions. |
| El Hacker | 4.0 | 4.3 | Kiro — Closed source, no key of my own, no local models, and a credit meter; the hooks and steering files are good enough that I resent how little else I can touch. |
Picks are derived from each critic's own scores. Humans vote on matchups on the duels page.