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openai/gpt-5-2-pro
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GPT-5.2 Pro

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.

12/10/2025
400,000 tokens
Specifications

Modalities

Input
image
text
file
Output
text

Supported Parameters

include_reasoning
max_tokens
reasoning
response_format
seed
structured_outputs
tool_choice
tools

Max Output Tokens

128,000