Codex by OpenAI
AI that writes code for you
Kilo Code
OSS AI coding assistant for planning, building & fixing code
Updated February 2026
| Codex by OpenAI | Kilo Code | |
|---|---|---|
| Rating | 5.0★ | 5.0★ |
| Reviews | 20 | 39 |
| Pros | 0 | 16 |
| FactScore™ | 66.1 | 79.3 |
FactScore™ Comparison
FactScore™ weighs both quality (rating) and popularity (reviews) for a fairer ranking than stars alone.
Pros & Cons
Only in Codex by OpenAI — Pros
No unique pros listedBoth tools — Pros
—Only in Kilo Code — Pros
AI assistant Developer experience Customization options Cost-effective High-quality output Easy to use Reliable performance Easy integration Fast performance Workflow automation Context aware Open source Free tier Frequent updates Responsive support Community supportOnly in Codex by OpenAI — Cons
—Both tools — Cons
—Only in Kilo Code — Cons
Cost-effective Easy integrationDetails
| Codex by OpenAI | Kilo Code | |
|---|---|---|
| Categories | AI Coding Agents | AI Coding Agents |
| Platforms | Web | Web |
| Became Popular | August 10, 2021 | March 27, 2025 |
| Website | openai.com | kilo.ai |
Who Should Pick Which?
Choose Codex by OpenAI if...
- No unique pros listed
Choose Kilo Code if...
- AI assistant
- Developer experience
- Customization options
With a FactScore™ of 66.1 vs 79.3, Kilo Code leads in community reception. Codex by OpenAI uniquely offers No unique pros listed, while Kilo Code stands out for AI assistant and Developer experience.
What Users Say
Codex by OpenAI
Even with new models around, Codex remains one of the most reliable AI coding assistants—fast, structured, and still very useful.
Still the fastest way to get a working regex or a complex utility function from a single-line comment.
OpenAI Codex has become an essential part of our development workflow. With our AGENTS.md providing project context, Codex understands our monorepo architecture and coding conventions, autonomously...
Kilo Code
Pro: 1. notification is convenient 2. GLM-4.5 has a cheap subscription as LLM provider for Kilo Code. works well in most case. 3. architecture -> code mode make sense Con: 1. sometimes stuck in ...
Related Comparisons
Frequently Asked Questions
Which is better, Codex by OpenAI or Kilo Code?
Based on FactScore™, Kilo Code leads with a score of 79.3 vs 66.1. Kilo Code has a higher rating of 5.0★ compared to 5.0★.
What are the pros of Codex by OpenAI compared to Kilo Code?
Codex by OpenAI uniquely offers: No unique pros listed.
What are the pros of Kilo Code compared to Codex by OpenAI?
Kilo Code uniquely offers: AI assistant, Developer experience, Customization options, Cost-effective, High-quality output.
Is Codex by OpenAI better rated than Kilo Code?
Codex by OpenAI is rated 5.0★ from 20 reviews. Kilo Code is rated 5.0★ from 39 reviews.
What is the FactScore™ of Codex by OpenAI and Kilo Code?
FactScore™ weighs rating and review volume together. Codex by OpenAI scores 66.1 and Kilo Code scores 79.3.
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