ChatGPT merges Codex and adds GPT-5.6 tiers for knowledge work
jxnlco · x · 2026-07-22
ChatGPT is being positioned as an “everything app” for knowledge work as Codex gets merged into it. The post also points builders to the newly released GPT-5.6 variants, ChatGPT Work, and suggested settings/prompting guidance.
The referenced breakdown covers:
- When to use GPT-5.6 Sol, Terra, or Luna
- How to think about model vs. effort vs. speed
- Recommended GPT-5.6 settings and prompting tips
- New features such as ChatGPT Sites, Codex subagents, Appshots, and a built-in browser
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