# GPT-5.2 Pro

> OpenAI's pro-tier model for professional work, designed to give smarter and more precise responses.

## Key facts

- Model author: OpenAI
- Input: $21.00 per 1M tokens
- Output: $168.00 per 1M tokens
- Context window: 400,000 tokens
- Maximum output: 128,000 tokens
- Input modalities: image, text
- Output modalities: text
- Capabilities: reasoning, tools, vision
- Released: 2025-12-11
- Knowledge cutoff: Aug 31, 2025
- Model IDs: `openai/gpt-5.2-pro`
- Model page: https://www.realrelay.ai/model/openai/gpt-5.2-pro

## Overview

GPT-5.2 Pro is a pro-tier model from OpenAI for professional work, designed to produce smarter and more precise responses. It accepts text and image input and returns text, with reasoning and tool calling. It suits tasks where precision matters most.

It has a 400K-token context window and can generate up to 128,000 output tokens. It accepts text and image input and returns text. Its knowledge cutoff is August 31, 2025, and it was released on December 11, 2025.

## Capabilities

GPT-5.2 Pro supports reasoning, tool calling and image input, and returns text output.

OpenAI documents GPT-5.2 Pro as producing smarter and more precise responses for professional work.

## Pricing

GPT-5.2 Pro costs $21.00 per 1M input tokens and $168.00 per 1M output tokens. GPT-5.2 Pro is available through RealRelay's OpenAI-compatible API.

## Use cases

Use GPT-5.2 Pro for demanding professional analysis such as reviewing long reports, tables and chart screenshots, where image input and reasoning help produce a precise, carefully argued answer.

With tool calling it can also run multi-step research workflows that gather data from external systems before writing up the result. Image input lets charts and scanned pages be part of the analysis.

## Call it

OpenAI-compatible chat completions:

```bash
curl https://www.realrelay.ai/v1/chat/completions \
  -H "Authorization: Bearer $REALRELAY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "openai/gpt-5.2-pro", "messages": [{"role": "user", "content": "Hello"}]}'
```

## FAQ

### What is GPT-5.2 Pro?

GPT-5.2 Pro is a pro-tier model from OpenAI for professional work, designed to produce smarter and more precise responses.

### How much does GPT-5.2 Pro cost?

GPT-5.2 Pro costs $21.00 per 1M input tokens and $168.00 per 1M output tokens.

### What is the context window of GPT-5.2 Pro?

GPT-5.2 Pro has a 400K-token context window and can generate up to 128,000 output tokens.

### What inputs and outputs does GPT-5.2 Pro support?

GPT-5.2 Pro accepts text and image input and returns text.

### Does GPT-5.2 Pro support tool calling?

Yes. GPT-5.2 Pro supports tool calling, along with reasoning and image input.

### When was GPT-5.2 Pro released?

GPT-5.2 Pro was released on December 11, 2025. Its knowledge cutoff is August 31, 2025.

### How do I call GPT-5.2 Pro via the API?

Call GPT-5.2 Pro through RealRelay's OpenAI-compatible API by setting the model name to openai/gpt-5.2-pro.