Description
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 harder queries, improving accuracy on math, coding, and multi-step tasks without slowing down typical conversations. The model is warmer and more conversational by default, with better instruction following and more stable short-form reasoning. GPT-5.1 Chat is designed for high-throughput, interactive workloads where responsiveness and consistency matter more than deep deliberation.
API Usage Examples
OpenAI Compatible Endpoint
Use this endpoint with any OpenAI-compatible library. Model: OpenAI: GPT-5.1 Chat (openai/gpt-5.1-chat)
curl https://api.ridvay.com/v1/chat/completions -H "Content-Type: application/json" -H "Authorization: Bearer YOUR_API_KEY" -d '{
"model": "openai/gpt-5.1-chat",
"messages": [
{
"role": "user",
"content": "Explain the capabilities of the OpenAI: GPT-5.1 Chat model"
}
],
"temperature": 0.7,
"max_tokens": 1024
}'Supported Modalities
- Text
- Images
API Pricing
- Input: 1.25$ / 1M tokens
- Output: 10$ / 1M tokens
Token Limits
- Max Output: 16,384 tokens
- Max Context: 128,000 tokens
Subscription Tiers
- free
- pro
- ultimate