When you pick ChatGPT 5 you are actually picking Auto mode, which selects among the various ChatGPT 5 models, some of which are among the best models in the world, some of which are much weaker. If you pay for access, select “GPT-5 Thinking” for almost any problem beyond a simple chat.
The Graduate-Level Google-Proof Q&A test (GPQA) is a series of very hard multiple-choice problems designed to test advanced knowledge. non-experts with access to the internet get 34% right, PhDs with internet access get 74-81% inside their specialty. The cost per million tokens is the cost of using the model. (I gathered this data, so apologies for any errors.)
