Oolama? That plan is more than generous for $20.
From my experience:
* OpenAI was ~$170 per week in value
* Claude was around $500 per week in value.
* Ollama Cloud is giving me about ~$160 per week in value.
So right now (thing constantly change in the AI world), its not more generous then Claude.
How is that the case? ChatGPT not only gives a lot of Codex/Agentic usage, once you've run out of that you still have a massive quota of Chat usage that's entirely separate. You can still use plug-ins with Github, Google Drive, etc... using the Chat usage as well.