OpenAI: GPT-5.2 Pro

openai/gpt-5.2-pro

Created Dec 10, 2025400,000 context

$21/M input tokens$168/M output tokens$10/K web search

GPT-5.2 Pro is OpenAI’s most advanced model, offering major improvements in agentic coding and long context performance over GPT-5 Pro. It is optimized for complex tasks that require step-by-step reasoning, instruction following, and accuracy in high-stakes use cases. It supports test-time routing features and advanced prompt understanding, including user-specified intent like "think hard about this." Improvements include reductions in hallucination, sycophancy, and better performance in coding, writing, and health-related tasks.

Providers for GPT-5.2 Pro

OpenRouter routes requests to the best providers that are able to handle your prompt size and parameters, with fallbacks to maximize uptime.

Performance for GPT-5.2 Pro

Compare different providers across OpenRouter

Apps using GPT-5.2 Pro

Top public apps this week using this model

Recent activity on GPT-5.2 Pro

Total usage per day on OpenRouter

Uptime stats for GPT-5.2 Pro

Uptime stats for GPT-5.2 Pro across all providers

Sample code and API for GPT-5.2 Pro

OpenRouter normalizes requests and responses across providers for you.

OpenRouter supports reasoning-enabled models that can show their step-by-step thinking process. Use the reasoning parameter in your request to enable reasoning, and access the reasoning_details array in the response to see the model's internal reasoning before the final answer. When continuing a conversation, preserve the complete reasoning_details when passing messages back to the model so it can continue reasoning from where it left off. Learn more about reasoning tokens.

In the examples below, the OpenRouter-specific headers are optional. Setting them allows your app to appear on the OpenRouter leaderboards.

Using third-party SDKs

For information about using third-party SDKs and frameworks with OpenRouter, please see our frameworks documentation.

See the Request docs for all possible fields, and Parameters for explanations of specific sampling parameters.

GPT-5.2 Pro - API, Providers, Stats | OpenRouter