v1.1.11: GPT-5.2-Codex Is Here
Release Date: January 10, 2026
One-Line Summary
This update lets ChatGPT Plus/Pro users directly log in to use GPT-5.2-Codex model, no separate API purchase needed, plus fixes the lag issue after long-term use.
New Feature: GPT-5.2-Codex Support
What's Updated?
OpenAI's latest code model GPT-5.2-Codex is now available in OpenCode.
Most importantly: If you're already a ChatGPT Plus ($20/month) or Pro ($200/month) user, you can directly use your subscription to log in, no need to buy API separately!
What Is GPT-5.2-Codex?
GPT-5.2-Codex is a professional code model released by OpenAI on December 18, 2025, further optimized based on GPT-5.2. It's particularly good at:
- Long-duration code tasks (supports context compaction)
- Large-scale refactoring and code migration
- Understanding designs and screenshots
- Bug discovery and code auditing
When to Use Codex?
| Scenario | Recommended Model |
|---|---|
| Writing complex features, refactoring code | ✅ GPT-5.2-Codex |
| Daily Q&A, writing documentation | GPT-5.2 Instant |
Simply put: Use Codex for coding, use GPT-5.2 Instant for everything else.
How to Use?
👉 Full Tutorial: Connect OpenAI (GPT-5.2 / Codex)
Quick Experience (ChatGPT Plus/Pro users):
- Enter
/connect - Select OpenAI
- Select ChatGPT Plus/Pro login method
- Complete browser authorization
- Enter
/models, selectgpt-5.2-codex - Start coding!
Bug Fix: No More Lag After Long-Term Use
Previous Issue
Some users reported: After OpenCode runs for a few hours, the interface becomes increasingly slow, even freezing.
Current Behavior
This issue has been fixed. You can safely leave OpenCode open without worrying about lag.
Should You Upgrade?
| Situation | Recommendation |
|---|---|
| Have ChatGPT Plus/Pro, want to use Codex | ✅ Must upgrade |
| Previously encountered lag/crash | ✅ Upgrade |
| Everything works fine, no issues | Can wait for next upgrade |
Upgrade Command:
opencode upgradeTechnical Details (Skippable)
Click to expand full changelog
Core
- Add Codex authentication support (ChatGPT Plus/Pro subscription login)
- Ensure GPT-5.2-Codex supports multiple variants
- Adjust Codex style and fix prompt display
- Update OpenAI documentation and authentication methods
- Improve Codex instruction prompts, optimize task planning capability
TUI
- Fix instance destruction issue, prevent memory leaks and dangling references
Community Contributors
- @spoons-and-mirrors: Add URL instruction documentation