A: reposting a response from a previous question:
For IDE, T3 is intended for general purpose needs, and T4/T5 is intended for more heavy usage or more serious programming tasks.
The primary differences will be:
- Agent Mode query limits. T3 will have lower limits. Think of it as an software agent equivalent to "Deep Research in Perplexity", where you get limited requests for deep research on a topic. Or something similar to Manus, but for coding.
- Usage with Agent Mode turned OFF will be governed by compute points, per plan tier. This still uses an agent, however, it works faster and less complex scenarios. It still created project files, structure etc.
- Deployment, Image uploads, Downloads, # of projects limit will be higher for T4/T5

Hope this helps! This is not on the AppSumo page because IDE was not released in the earlier flash sale, and we can only list the available features (and not the promised features).