Question 1

What is GPT-5 Pro?

Accepted Answer

GPT-5 Pro is a model from OpenAI, released on Aug 7, 2025. GPT-5 Pro is OpenAI’s most advanced model, offering major improvements in reasoning, code quality, and user experience. $15 per million input tokens, $120 per million output tokens. 400,000 token context window, maximum output of 128,000 tokens.

Question 2

How much does GPT-5 Pro cost?

Accepted Answer

On the Respan gateway, input starts at $15.00 per 1M tokens on every provider, and output starts at $120.00 per 1M tokens on every provider, after gateway discounts.

Question 3

Which providers serve GPT-5 Pro on Respan?

Accepted Answer

4 providers serve GPT-5 Pro: Azure OpenAI, OpenAI, and OpenRouter. Azure OpenAI requires your own provider API key (BYOK).

Question 4

What is GPT-5 Pro's context window?

Accepted Answer

GPT-5 Pro accepts up to 400K tokens of context on its largest provider route.

Question 5

How do I use GPT-5 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-pro". 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 Pro?

Accepted Answer

Over the last 30 days of requests through the Respan gateway, the fastest provider was OpenAI at 4 tokens per second, and the lowest response latency was 12.2 seconds on OpenAI. Speed varies with request size and provider.

Question 7

How does GPT-5 Pro score on benchmarks?

Accepted Answer

GPT-5 Pro has 7 published benchmark scores, including WeirdML 60.4%, GPQA Diamond 88.4%, and FrontierMath Tiers 1-3 v2 55.8%. Each score links to where it was published; the data is collected by llmmetric.com.

Provider	Context	Input	Output
Azure OpenAIBYOK only`azure/gpt-5-pro`	400K	$15.00/M	$120.00/M
OpenAI`openai/gpt-5-pro`	400K	$15.00/M	$120.00/M
OpenAI`openai/gpt-5-pro-2025-10-06`	400K	$15.00/M	$120.00/M
OpenRouter`openrouter/openai/gpt-5-pro`	400K	$15.00/M	$120.00/M

GPT-5 Pro

Providers

Certified where it counts.

Pricing

Cost by volume

Throughput and latency

Output speed

Response latency

Benchmarks

Coding1

Reasoning2

Math4

Apps

GPT-5 Pro FAQ

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