OpenAI Codex
Input—per 1M tokens
Output—per 1M tokens
Context—tokens
WeightsClosed
About
OpenAI Codex is ranked #28 of 101 in AI coding assistants on Inferse, made by OpenAI Codex. It runs on Web, Windows, macOS, Linux. There is no free plan.
Compared on AI coding assistants
- Free plan
- Noopenai.com
- Agent mode
- Yesopenai.com
Facts
- Free plan
- Noopenai.com · 20 Sept 2026
- Chat assistance
- Yesopenai.com · 20 Sept 2026
- Coding agent
- Yesopenai.com · 20 Sept 2026
- Supported IDEs
- Visual Studio Code; Cursor; Windsurf; Visual Studio Code Insiders; Xcode; JetBrains IDEsopenai.com · 20 Sept 2026
- Codebase indexing
- Yesopenai.com · 20 Sept 2026
- Terminal access
- Yesopenai.com · 20 Sept 2026
Company
- Founded
- 2015openai.com · 28 Sept 2026
Best OpenAI Codex alternatives
See all 12
8.8 Devin $20/mo first paid tier Free plan 
8.8 Kilo Code $15/mo first paid tier Free plan 
8.7 CodeGPT $10/mo first paid tier Free plan 
7.7 Snowflake CoCo See plans price on the maker's page Free trial 
7.6 GitHub Copilot $10/mo first paid tier Free plan 
7.4 Gemini Code Assist $22.80/mo first paid tier Free plan 
Where it ranks on Inferse
- Best AI Coding Assistants in 2026#28 of 101
- Best AI Code Generators in 2026#15 of 54
Sources
- openai.com/codex/· checked 20 Sept 2026
- openai.com/business/pricing/· checked 20 Sept 2026