# 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 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.


## Model Information

- **Organization**: [Azure](/llm.txt)
- **Slug**: gpt-5-1-chat
- **Available at Providers**: 15
- **Release Date**: November 13, 2025

## Providers

| Provider | Name | $ Input (per 1M) | $ Output (per 1M) | Free | Link |
|----------|------|-----------------|------------------|------|------|
| [Mammouth AI](/llm/mammouth.txt) | gpt-5.1-chat | 1.25 | 10.00 |  |  |
| [Azure OpenAI](/llm/azure.txt) | GPT-5.1 Chat | 1.25 | 10.00 |  |  |
| [Azure AI Services](/llm/azurecognitiveservices.txt) | GPT-5.1 Chat | 1.25 | 10.00 |  |  |
| [Nano-GPT](/llm/nanogpt.txt) | GPT 5.1 Chat |  |  |  |  |
| [OpenRouter](/llm/openrouter.txt) | GPT-5.1 Chat | 1.25 | 10.00 |  | [View](https://openrouter.ai/openai/gpt-5.1-chat-20251113) |
| [Requesty](/llm/requesty.txt) |  | 1.25 | 10.00 |  |  |
| [ValorGPT](/llm/valorgpt.txt) | GPT-5.1 Chat |  |  |  | [View](https://www.valorgpt.com/models/openai-gpt-5.1-chat) |
| [Yupp](/llm/yupp.txt) | GPT-5.1 Chat (Azure OpenAI) |  |  |  |  |
| [ZenMUX](/llm/zenmux.txt) | OpenAI: GPT-5.1 Chat | 1.25 | 10.00 |  |  |
| [Kilo Code](/llm/kilocode.txt) | OpenAI: GPT-5.1 Chat | 1.25 | 10.00 |  |  |
| [GMI Cloud](/llm/gmi.txt) | GPT-5.1-chat | 1.25 | 10.00 |  |  |
| [Blackbox AI](/llm/blackboxai.txt) | blackboxai/openai/gpt-5.1-chat |  |  |  |  |
| [WaveSpeed AI](/llm/wavespeed.txt) | gpt-5.1-chat | 1.38 | 11.00 |  |  |
| [Airforce API](/llm/airforce.txt) | gpt-5.1-chat |  |  |  |  |
| [Writingmate](/llm/writingmate.txt) | OpenAI: GPT-5.1 Chat |  |  |  | [View](https://writingmate.ai/models/openai/gpt-5.1-chat) |

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