openai
OpenAI: GPT-5.1 Chat
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...
Quality Score
90/100
composite of price, context, capability
Input Price
$1.25
per 1M tokens
Output Price
$10.00
per 1M tokens
Context Window
128,000
tokens
- Model ID
- openai/gpt-5.1-chat
- Vendor
- openai
- Tokenizer
- GPT
- Input Modalities
- file, image, text
- Output Modalities
- text
- Max Output
- 16,384 tokens
- Tool Calling
- ✓ supported
- Structured Output
- ✓ supported
- Reasoning Mode
- not supported
- Vision
- ✓ accepts images
- Audio
- no
- Moderated
- yes
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