Google Antigravity vs Kiro
Updated Jul 18, 2026 · pricing verified for both tools
Antigravity is free at $0 for individuals while Kiro Pro costs $20/month for 1,000 credits — Kiro wins when you need a written spec before any code exists. Kiro turns a prompt into requirements, an architectural design, and a sequenced task list you approve, and that spec survives as documentation. Antigravity skips the planning step and orchestrates parallel agents at no cost. Kiro's monthly credits do not roll over, with overage at $0.04 each.
- Google Antigravity starts at
- $0
- Kiro starts at
- $20/mo
- Google Antigravity free tier
- Yes
- Kiro free tier
- Yes
Prices verified against the official pricing pages: Google Antigravity on Jul 16, 2026, Kiro on Jul 15, 2026.
Side by side
| Dimension | Google Antigravity | Kiro |
|---|---|---|
| Pricing | ✓ Free at $0 for individuals in preview; paid quota rides on Google AI Pro at $19.99/mo | Free tier; Pro $20/mo, Pro+ $40/mo, Pro Max $100/mo, Power $200/mo |
| Free tier | ✓ $0, metered by a quota refreshing on a rolling five-hour cycle, no credit card | 50 monthly credits with open-weight models plus Claude Sonnet 4.5 |
| Workflow | Prompt to agent — the agent manager plans and executes without a formal spec step | ✓ Spec-driven: requirements, design, and sequenced tasks approved before code is written |
| Cost predictability | Metered quota with no published credit-to-token rate; limits have moved without notice | ✓ Credits priced at $0.04 each with overage caps; monthly credits do not roll over |
| Model selection | ✓ Gemini, Claude Sonnet and Opus, and GPT-OSS-120B in one picker | Open-weight models plus Claude Sonnet on the free tier; premium Claude models on paid plans |
| Platforms | Desktop app, VS Code-based IDE, Go CLI, and SDK | Desktop IDE built on Code OSS, plus CLI and web; imports VS Code settings and Open VSX plugins |
| Parallel agents | Agent manager and Agent Teams run sandboxed agents concurrently | Parallel agents execute sequenced spec tasks concurrently across large codebases |
Pricing, verified
Google Antigravity
FREEMIUM| Plan | Price |
|---|---|
| Individual (Public Preview) | Free |
| Google AI Pro | $19.99/mo |
| Google AI Ultra | From $99.99/mo |
| AI Credits (top-up) | $25 per 2,500 credits |
Kiro
FREEMIUM| Plan | Price |
|---|---|
| Free | Free |
| Pro | $20/mo |
| Pro+ | $40/mo |
| Pro Max | $100/mo |
| Power | $200/mo |
| Teams | $20/user/mo |
When to pick Antigravity
- Cost decides it. Antigravity is $0 for individuals with no credit card, while Kiro’s free tier gives 50 credits a month — enough to evaluate the workflow, not to work in it.
- You want to choose your model per task. Antigravity’s picker spans Gemini, Claude Sonnet and Opus, and GPT-OSS-120B, where Kiro’s free tier pairs open-weight models with Claude Sonnet and reserves premium models for paid plans.
- Your tasks are small or exploratory. Writing and reviewing a formal requirements-and-design document first is real overhead, and Antigravity lets you go straight from prompt to working agent.
When to pick Kiro
- You are delivering something structured. Kiro converts a prompt into requirements, an architectural design, and a sequenced task list you sign off on before agents implement it — and that spec stays as living documentation for the project.
- You need to forecast spend. Kiro publishes credits per tier (1,000 at $20/month up to 10,000 at $200/month) and prices overage at a flat $0.04 per credit with caps, while Antigravity does not publish a credit-to-token conversion rate at all.
- You want a shipping product rather than a preview. Kiro is generally available from AWS with SSO and organizational management on its team plans; Antigravity is still a public preview with no standalone price commitment.
Bottom line
This is Google’s agentic IDE against AWS’s, and they disagree about where the work starts. Antigravity starts at the agent: describe a task, and the agent manager spawns sandboxed workers to do it, free for individuals. Kiro starts at the spec: describe a task, and you get requirements, a design, and an ordered task list to approve before anything is implemented. That upfront step is pure friction on a throwaway script and genuinely valuable on a multi-week feature. Price favours Antigravity at $0 against Kiro’s $20/month Pro tier, but Kiro’s billing is the more legible of the two — flat credits with a published $0.04 overage rate against a preview quota that has been reduced more than once. Choose on workflow, not price: if you would have written the spec anyway, Kiro writes it for you.
Frequently asked questions
Is Google Antigravity better than Kiro?
Antigravity is free at $0 for individuals while Kiro Pro costs $20/month for 1,000 credits — Kiro wins when you need a written spec before any code exists. Kiro turns a prompt into requirements, an architectural design, and a sequenced task list you approve, and that spec survives as documentation. Antigravity skips the planning step and orchestrates parallel agents at no cost. Kiro's monthly credits do not roll over, with overage at $0.04 each. Updated Jul 18, 2026.
Is Google Antigravity cheaper than Kiro?
Yes — Google Antigravity starts at $0 versus $20/mo for Kiro. Prices verified against the official pricing pages: Google Antigravity on Jul 16, 2026, Kiro on Jul 15, 2026.
Do Google Antigravity and Kiro have free tiers?
Yes — both do. Google Antigravity has a free tier (the Individual (Public Preview) plan). Kiro has a free tier (the Free plan).
Can I use Google Antigravity and Kiro on mobile or via an API?
Google Antigravity runs on desktop, the command line and offers an API. Kiro runs on desktop, the command line, the web and does not list an API.