OpenAI: GPT-5.1 Chat

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.

Raw fields snapshot

{
  "id": "openai/gpt-5.1-chat",
  "name": "OpenAI: GPT-5.1 Chat",
  "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.\n",
  "created": 1763060302,
  "canonical_slug": "openai/gpt-5.1-chat-20251113",
  "hugging_face_id": "",
  "source_type": "openrouter_only",
  "context_length": 128000,
  "max_completion_tokens": 16384,
  "is_moderated": true,
  "architecture": {
    "modality": "text+image+file->text",
    "input_modalities": [
      "file",
      "image",
      "text"
    ],
    "output_modalities": [
      "text"
    ],
    "tokenizer": "GPT",
    "instruct_type": null
  },
  "input_modalities": [
    "file",
    "image",
    "text"
  ],
  "output_modalities": [
    "text"
  ],
  "modality": "text+image+file->text",
  "tokenizer": "GPT",
  "instruct_type": null,
  "supported_parameters": [
    "max_tokens",
    "response_format",
    "seed",
    "structured_outputs",
    "tool_choice",
    "tools"
  ],
  "default_parameters": {
    "temperature": null,
    "top_p": null,
    "frequency_penalty": null
  },
  "per_request_limits": null,
  "top_provider": {
    "context_length": 128000,
    "max_completion_tokens": 16384,
    "is_moderated": true
  },
  "pricing": {
    "prompt": "0.00000125",
    "completion": "0.00001",
    "web_search": "0.01",
    "input_cache_read": "0.000000125"
  },
  "PPM": {
    "prompt": 1.25,
    "completion": 10,
    "web_search": 10000,
    "input_cache_read": 0.125
  },
  "openrouter_raw": {
    "id": "openai/gpt-5.1-chat",
    "canonical_slug": "openai/gpt-5.1-chat-20251113",
    "hugging_face_id": "",
    "name": "OpenAI: GPT-5.1 Chat",
    "created": 1763060302,
    "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.\n",
    "context_length": 128000,
    "architecture": {
      "modality": "text+image+file->text",
      "input_modalities": [
        "file",
        "image",
        "text"
      ],
      "output_modalities": [
        "text"
      ],
      "tokenizer": "GPT",
      "instruct_type": null
    },
    "pricing": {
      "prompt": "0.00000125",
      "completion": "0.00001",
      "web_search": "0.01",
      "input_cache_read": "0.000000125"
    },
    "top_provider": {
      "context_length": 128000,
      "max_completion_tokens": 16384,
      "is_moderated": true
    },
    "per_request_limits": null,
    "supported_parameters": [
      "max_tokens",
      "response_format",
      "seed",
      "structured_outputs",
      "tool_choice",
      "tools"
    ],
    "default_parameters": {
      "temperature": null,
      "top_p": null,
      "frequency_penalty": null
    },
    "expiration_date": null
  }
}