I use a $200/mo OpenAI Codex sub. Throughout the workday I run an average of 2 concurrent agents of GPT 5.5 with high reasoning on fast mode and use less than half of my subscription usage.
For more interactive/active usage you might be better off using the low reasoning level, but I have usually found high to be a good balance of intelligence and generation speed.
For more interactive/active usage you might be better off using the low reasoning level, but I have usually found high to be a good balance of intelligence and generation speed.