Side-by-side comparison · Coding & Dev Tools
Claude Code vs Kiro vs OpenAI Codex
Everything that matters when choosing between them, in one place: our rating, what each can do, what they cost, and the trade-offs.
Comparing 3 tools, the maximum.
At a glance
Pick it if: Anyone building software, from first-timers to senior engineers, who wants an AI that does the work itself.
Pick it if: Developers and technical founders who want a written plan before the AI builds anything, especially teams already on AWS.
Pick it if: ChatGPT subscribers who want a coding agent without paying for a second subscription.
Claude Code scores highest overall, but OpenAI Codex gives you more for your money. Which one is right comes down to what you value most.
Overview
| Attribute | Claude Code | Kiro | OpenAI Codex |
|---|---|---|---|
| In one line | An AI agent that works inside your project: it reads, writes and runs the code for you. | Amazon's AI code editor that writes a plan and requirements before it writes any code. | OpenAI's coding agent. Hand it a task and it works away while you do other things. |
| Pricing model | Paid | Freemium | Freemium |
| Starting price | $20/mo | $20/mo | $8/mo |
| Free plan | No | Yes | Yes |
| Works with Claude Code | Yes | Yes | No |
Rating breakdown
Our scores out of 5. The higher bar in each row is highlighted.
| Attribute | Claude Code | Kiro | OpenAI Codex |
|---|---|---|---|
| Overall rating | 4.4Winner | 3.6 | 4.2 |
| Ease of useHow quickly someone non-technical gets value from it. | 3.5 | 4.0 | 3.5 |
| FeaturesHow completely it covers the job it's built for, and how well the pieces fit together. | 5.0 | 4.5 | 4.5 |
| Output qualityHow good the results are before you fix them. | 5.0 | 3.5 | 4.5 |
| Value for moneyWhat you get for the price, including the free plan. | 4.0 | 3.0 | 4.5 |
| Speed & reliabilityHow fast it is and how often it falls over. | 4.5 | 3.0 | 4.0 |
Feature comparison
A tick means it does this today. A dash means we haven't checked.
| Attribute | Claude Code | Kiro | OpenAI Codex |
|---|---|---|---|
| Access & platform | |||
| Free plan | No | Yes | Yes |
| Mobile app | Yes | Yes | Yes |
| Desktop app | Yes | Yes | Yes |
| Browser extension | No | No | No |
| API access | Yes | No | Yes |
| Teams & business | |||
| Team workspace | Yes | Yes | Yes |
| Enterprise plan or SSO | Yes | Yes | Yes |
| Connects to other apps | Yes | Yes | Yes |
| Open source or self-hosted | No | No | Yes |
| AI abilities | |||
| Works with your files | Yes | Yes | Yes |
| Understands images | Yes | Yes | Yes |
| Makes images | No | No | No |
| Makes video | No | No | No |
| Writes code | Yes | Yes | Yes |
| Runs agents or automations | Yes | Yes | Yes |
| Learns your brand or style | Yes | Yes | Yes |
| Works in many languages | Yes | Yes | Yes |
| Capabilities score | 12/ 17 | 12/ 17 | 14/ 17 |
Pricing
Plans as listed on each vendor's site when we last checked. Confirm before you buy.
| Attribute | Claude Code | Kiro | OpenAI Codex |
|---|---|---|---|
| Plans | ProOur pick $20/mo, or $17/mo billed yearly Trying Claude Code and light daily use. | Free Free Trying spec mode on a small project. | Free Free A quick look at what it can do. |
Team From $20/seat/mo billed yearly, or $25 monthly Businesses with 2 to 150 people who want central billing. | ProOur pick $20/mo Most individuals using it a few days a week. | Go $8/mo Occasional light tasks. | |
Enterprise $20/seat/mo billed yearly, 20-seat minimum Larger companies with compliance needs. | Pro+ $40/mo Regular daily users. | PlusOur pick $20/mo Anyone who already pays for ChatGPT. | |
Max From $100/mo Anyone running Claude Code for hours a day. | Pro Max $100/mo Professionals in Kiro for hours each day. | Pro From $100/mo Developers who hit the Plus limits. | |
API (pay as you go) Usage based Teams who want to pay only for what they use. | Power $200/mo The heaviest users. | Business $20/user/mo billed yearly, or $25 monthly Teams of 2 or more. | |
Enterprise Custom Companies that need SSO and central billing. | Enterprise Custom Large organisations. | ||
| Which plan to pick | Start on Pro. It is enough to build a small site or tool in evenings and weekends. If you hit the limit most days, Max 5x is the next step; it costs five times as much but usually works out cheaper than paying for the API directly. Max also lets you spend up to half your weekly limit on Fable, which Pro only gets through paid credits. | Pro at $20 is the place to start, and you get $20 off your first paid month when you upgrade. Use the Auto model to make credits last, and only move up a tier once you know your monthly usage. | If you already have ChatGPT Plus, you have Codex: just try it. If you are choosing between this and Claude Code with no existing subscription, Plus at $20 and Claude Pro at $20 cost the same, so pick whichever chat assistant you prefer. If you outgrow Plus, Pro starts at $100 and has no five-hour limit for now. The $200 tier gives new subscribers less usage than it used to, and Ultrafast mode is only on the $500 tier. |
Key features
| Attribute | Claude Code | Kiro | OpenAI Codex |
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Pros and cons
| Attribute | Claude Code | Kiro | OpenAI Codex |
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Who each one is for
| Attribute | Claude Code | Kiro | OpenAI Codex |
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Questions people ask
Which is better, Claude Code, Kiro or OpenAI Codex?
Claude Code scores highest overall in our ratings (Claude Code 4.4/5, Kiro 3.6/5 and OpenAI Codex 4.2/5). Claude Code is best for building features end to end and fixing bugs you can't find. Kiro is best for turning a rough idea into requirements and a plan and bigger features you want planned before building. OpenAI Codex is best for background tasks in the cloud and starting a task from your phone.
Which is cheaper, Claude Code, Kiro or OpenAI Codex?
Claude Code: There's no free plan. Paid plans start at $20/mo. Kiro: There's a free plan, and paid plans start at $20/mo. OpenAI Codex: There's a free plan, and paid plans start at $8/mo.
Which is easier to use, Claude Code, Kiro or OpenAI Codex?
Kiro rates highest for ease of use in our scores. Developers and technical founders who want a written plan before the AI builds anything, especially teams already on AWS.
How we compare
Ratings are our own, from using each tool, across ease of use, features, output quality, value for money, speed & reliability.
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