I Use ChatGPT Plus on a daily basis extensively . Gemini (unpaid) is something what I use as well, as it gives more detailed answers even with fewer prompts. Also gemini helps if I want to quickly understand one particular concept from a answer provided by gpt

My employer gives us access to ChatGPT, Claude and Deepseek through a self hosted internal platform, and we also have GH Copilot access. We're restricted to these rather than any of the other options for IP reasons.

I find Copilot (at least the version we have) to be almost totally useless beyond autocomplete, but I use the internal platform a lot, particularly for redrafting documents to be more polite (I'm a bit of a grump). I've found that the context I can be bothered to paste into that is good for getting ideas in SW off the ground but I find reliability to be mixed. I tried to implement a modification to some code in Go using concurrency recently (not a topic I'm very familiar with and so would have struggled to do alone) and for e.g. the code it outputted deadlocked and despite a lot of prompting, I couldn't resolve it.