Question 1

What is GPT-5.2 Pro?

Accepted Answer

GPT-5.2 Pro is a model from OpenAI, released on Dec 11, 2025. GPT-5.2 Pro is OpenAI’s most advanced model, offering major improvements in agentic coding and long context performance over GPT-5 Pro. $21 per million input tokens, $168 per million output tokens. 400,000 token context window, maximum output of 128,000 tokens.

Question 2

How much does GPT-5.2 Pro cost?

Accepted Answer

On the Respan gateway, input starts at $21.00 per 1M tokens on every provider, and output starts at $168.00 per 1M tokens on every provider, after gateway discounts.

Question 3

Which providers serve GPT-5.2 Pro on Respan?

Accepted Answer

3 providers serve GPT-5.2 Pro: OpenAI and OpenRouter.

Question 4

What is GPT-5.2 Pro's context window?

Accepted Answer

GPT-5.2 Pro accepts up to 400K tokens of context on its largest provider route.

Question 5

How do I use GPT-5.2 Pro with the Respan gateway?

Accepted Answer

Point any OpenAI-compatible SDK at https://api.respan.ai/api/ with your Respan API key and set the model to "openai/gpt-5.2-pro-2025-12-11". To set it up with a coding agent, copy the agent setup prompt at the top of this page.

Question 6

How fast is GPT-5.2 Pro?

Accepted Answer

Over the last 30 days of requests through the Respan gateway, the fastest provider was OpenRouter at 2 tokens per second, and the lowest response latency was 5.7 seconds on OpenAI. Speed varies with request size and provider.

Question 7

How does GPT-5.2 Pro score on benchmarks?

Accepted Answer

GPT-5.2 Pro has 13 published benchmark scores, including BrowseComp 77.9%, GPQA Diamond 93.2%, and AIME 2025 (no tools) 100%. Each score links to where it was published; the data is collected by llmmetric.com.

Provider	Context	Input	Output
OpenAI`openai/gpt-5.2-pro`	400K	$21.00/M	$168.00/M
OpenAI`openai/gpt-5.2-pro-2025-12-11`	400K	$21.00/M	$168.00/M
OpenRouter`openrouter/openai/gpt-5.2-pro`	400K	$21.00/M	$168.00/M

GPT-5.2 Pro

Providers

Certified where it counts.

Pricing

Cost by volume

Throughput and latency

Output speed

Response latency

Benchmarks

Agents2

Reasoning6

Math5

Apps

GPT-5.2 Pro FAQ

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