GPT-5.6 naming mess: Pro is smartest, Ultra weaker on hard tasks?

Opinion: GPT-5.6 Pro (chatbot only) is the smartest; GPT-5.6 Ultra (best in Codex) weaker on hard tasks. For hardest problems: Sol Pro > Fable 5 Ultracode > Sol Ultra. Confusing naming.

• OpenAI
• 模型比较
• GPT-5.6
• 命名