Rolling out today for Free/Plus/Pro users, Enterprise gets it next week
All previous models will be discontinued
GPT-5 picks by itself whether to answer fast (like 4o) or think deeply (like o3)
Pricing changes (API)
GPT-5: $1.25 input / $10 output per 1M tokens
That's 25% more expensive than GPT-4o for input, same for output
For programming
Available in Cursor now with free tokens during launch - a good time for A/B testing
74.9% success rate on SWE-bench (vs Claude 4.1 Opus's 72.5%, Gemini 2.5 Pro's 63.2%)
Runs multiple tools at the same time → faster results
Better at cross-file reasoning and long coding tasks
What caught my attention
26% fewer hallucinations compared to GPT-4o
Gmail and Calendar access (Pro tier first) - can't wait to give it a spin!
Much better at following instructions (99% on tests vs ~85% before)
Available in Cursor and OpenAI Playground now. ChatGPT access is rolling out gradually.
I'll be testing it heavily over the next days and will share what I've found later.
What's your experience with GPT-5 so far? Have you noticed the improvements?