If you are concerned about privacy, or you simply want access to various ai's from one webapp, I suggest using an AI wrapper like ppq.ai or openrouter.ai
Using these, you can use different AI engines for different uses. For example, chatgpt o3 for advanced reasoning or web research, and then deepseek for cheap queries.
-The accounts are anonymous
-You only need to pay once
-You can pay with crypto
Notes:
-PPQ has o3 but without web search
-For openrouter, to use o3 you have to provide your own api key, so it doesn't work for privacy. But there is an alternative that's at least as good in terms of quality of advanced reasoning and deepresearch, which is called Perplexity Sonar Deep Research (just note that it's slow and has iffy uptime, so it may fail searches, and you have to keep retrying)
-Gemini 2.0 and 2.5 have similar quality to chatgpt 4o and o3, but at much lower cost that's similar to deepseek2