GPT-5.1 Instant (or GPT-5.1 chat) is a warmer and more conversational version of GPT-5-chat, with improved instruction following and adaptive reasoning for deciding when to think before responding.
import { streamText } from 'ai'
const result = streamText({ model: 'openai/gpt-5.1-instant', prompt: 'What is the history of the San Francisco Mission-style burrito?'})Try out GPT-5.1 Instant by OpenAI. Usage is billed to your team at API rates. Free users get $5 of credits every 30 days, and you are considered a free user if you haven't made a payment.
Azure
Context 128K
Input Tokens
Output Tokens $10.00/M
Cache Read Tokens $0.13/M
GPT-4.1 mini
GPT 4.1 mini provides a balance between intelligence, speed, and cost that makes it an attractive model for many use cases.