According to @OpenAI, GPT-5 introduces four chat personalities—Cynic, Robot, Listener, Nerd—as a text-only research preview accessible via Customize ChatGPT in settings with opt-in and change-anytime controls; source: OpenAI official X post dated Aug 7, 2025. The same post provides no details on multimodal capability, API access, pricing, or enterprise rollout timelines; source: OpenAI official X post dated Aug 7, 2025. The post also does not reference any blockchain integrations or crypto features; source: OpenAI official X post dated Aug 7, 2025.