OpenAI updated GPT-6 Pro in ChatGPT so several agents can work on different parts of one task at once. You can watch each agent in the conversation and open finished sub-tasks to review the work. OpenAI says responses are faster and tool use is better, without publishing a number for either. It is rolling out to eligible Pro users. A separate update the next day lets Codex subagents reuse context, and keeps cached context alive longer.