G
GAI coding assistant and agents for editors, terminal, desktop and GitHub
Free, from $10/mo
Kiro vs OpenAI Codex
Pricing, features, platforms and who each one suits — side by side.
K
Choose Kiro if…
- you're in its core audience: software developers, engineering teams
O
Choose OpenAI Codex if…
- you want the lower entry price ($8/mo vs $20/mo)
- you need an API to build on
- you work on iOS, Slack
- you're in its core audience: software developers, engineering teams
Side by side
Feature Kiro OpenAI Codex
Pricing modelFreemiumFreemium
Starting price$20/mo$8/mo
Free plan
Free trial
API
Open source
Security and compliance—SOC 2 Type II, ISO 27001, GDPR, HIPAA
Updates, last 90 days95
Agent mode
CLI / terminal
Cloud agents
AI PR review
MCP support—
PlatformsWebWeb, iOS, API, Slack
CategoryCode AssistantsCode Assistants
CompanyAWSOpenAI OpCo, LLC
Based in—United States
Founded——
Part of——
Key features
K Kiro
- Turns prompts into requirements, designs and task lists
- Parallel agents running locally or in the cloud
- Property-based tests to catch edge cases
- Checks requirements for contradictions and gaps
- Headless CLI for PR reviews in CI/CD
- Agent hooks that run tasks on triggers
- Model choice: Claude, GPT-5.6, open-weight or Auto
- Supports MCP, AGENTS.md and Agent Client Protocol
O OpenAI Codex
- Desktop app for local coding chats
- Command-line interface (CLI)
- IDE extension
- Cloud tasks through Codex on the web
- Automatic GitHub code review
- Slack integration
- SDK for scriptable workflows
- Works with an API key and pay-per-use billing
Plans and prices
From each vendor's site. Prices change — confirm before buying.
Kiro
Kiro Free$0
Kiro Pro$20
Kiro Pro+$40
Kiro Pro Max$100
Kiro Power$200
EnterpriseCustom
OpenAI Codex
Free$0/month
Go$8/month
Plus$20/month
ProFrom $100/month
Business$20/user/month billed annually; $25 billed monthly
Enterprise & EduContact sales
API KeyPay per usage
Strengths and limitations
Kiro
- Free plan with 50 credits per month
- No daily or weekly rate limits on paid plans
- Choice of many models, plus an Auto mode
- IDE supports Open VSX extensions and VS Code settings
- Unused monthly credits do not roll over
- Each team member needs their own subscription
- Use through third-party automation harnesses is not permitted
- Not all premium models are available in all regions
OpenAI Codex
- Free plan includes basic Codex use in the desktop app
- Available in the desktop app, CLI, IDE, web, iOS and SDK
- Enterprise controls such as SCIM, RBAC, EKM and data residency
- API key option for pay-per-use billing
- Free and Go plans have no published usage numbers
- Plus usage limits are given only as estimated ranges
- API key use doesn't include cloud features such as code review or Slack
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Built from each vendor's public website; we haven't tested them hands-on. Editorial policy