OpenAI: GPT-5.1 Chat
openai
GPT-5.1 Chat (AKA Instant is the fast, lightweight member of the 5.1 family, optimized for low-latency chat while retaining strong general intelligence. It uses adaptive reasoning to selectively “think” on...
- Context window
- 128,000 tokens
- Input cost
- $1.25 / 1M
- Output cost
- $10.00 / 1M
- Latency (p50)
- —