Question 1

What is GPT-5.4 Image 2?

Accepted Answer

GPT-5.4 Image 2 is a model from OpenAI, released on Apr 21, 2026. GPT-5.4 Image 2 combines OpenAI's GPT-5.4 model with state-of-the-art image generation capabilities from GPT Image 2. It enables rich multimodal workflows, allowing users to seamlessly move between reasoning, coding, and...

Question 2

How much does GPT-5.4 Image 2 cost?

Accepted Answer

On the Respan gateway, input starts at $8.00 per 1M tokens on OpenRouter, and output starts at $15.00 per 1M tokens on OpenRouter, after gateway discounts.

Question 3

Which providers serve GPT-5.4 Image 2 on Respan?

Accepted Answer

GPT-5.4 Image 2 is served by OpenRouter.

Question 4

What is GPT-5.4 Image 2's context window?

Accepted Answer

GPT-5.4 Image 2 accepts up to 272K tokens of context.

Question 5

How do I use GPT-5.4 Image 2 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 "gpt-5.4-image-2". 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-5.4 Image 2?

Accepted Answer

Over the last 30 days of requests through the Respan gateway, the fastest provider was OpenRouter at 12 tokens per second, and the lowest response latency was 0.9 seconds on OpenRouter. Speed varies with request size and provider.

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