Codex
Codex is included in your ChatGPT Free, Go, Plus, Pro, Business, or Enterprise plan.
Best for trying out ChatGPT
Test Codex Capabilities
Limited access to flagship model GPT-5.6
Limited messages and uploads
Limited and slower image generation
Limited deep research
Limited memory and context
Best for longer conversations
Test Codex Capabilities
More access to our flagship model GPT-5.6
More messages
More uploads
More image creation
Longer memory
Access the latest models
Best for advanced work and productivity
Expanded Codex usage
Build with the Codex app for macOS and Windows
Connect tools like Slack, GitHub, Figma, and more with Plugins
Advanced reasoning models
Expanded messages and uploads
Expanded and faster image creation
Expanded deep research and agent mode
Expanded memory and context
Projects, tasks, and custom GPTs
Early access to new features
Best for research and coding
Maximum Codex tasks
Unlock everything included in ChatGPT Pro
Pro reasoning powered by GPT-6
Unlimited GPT-5.6 and file uploads
Unlimited and faster image creation
Maximum deep research and agent mode
Maximum memory and context
Expanded projects, tasks, and custom GPTs
Research preview of new features
Unlimited subject to abuse guardrails. Learn more
Usage limits
Local messages and cloud chats share your plan’s usage allowance. Weekly limits may also apply.
For Enterprise/Edu users with flexible pricing, there are no fixed rate limits—usage scales with credits.
Enterprise and Edu plans without flexible pricing have the same per-seat usage limits as Plus for most features.
Frequently asked questions
If you are approaching your usage limit, switching to a lower-cost model can help your allowance last longer. GPT-6 Astra usage varies by task; see the usage table for current estimates.