# GPT‑5.1 Two upgraded models from OpenAI’s GPT‑5 family, now available on Replicate: - `gpt-5.1-chat-latest`: Fast, conversational, and responsive. Ideal for everyday use. - `gpt-5.1`: Slower, more thorough, and better at complex reasoning. These are drop-in replacements for GPT‑5 with improvements to instruction following, tone, and performance. --- ## 🧠 Models ### `gpt-5.1-chat-latest` The default option. Prioritizes speed, clarity, and natural conversation. It handles casual questions, creative writing, and multiturn chats well. Compared to `gpt-5`, it follows instructions more accurately, especially in constrained formats like: > “respond in exactly six words” > “answer like a pirate” The tone is warmer by default — less robotic, more human. That doesn’t mean less accurate, just easier to talk to. Also supports adaptive reasoning: the model decides whether to think before answering. For simple queries, it replies quickly. For harder ones, it t
