GPT-5 Image pricing and routing profile
GPT-5 Image from OpenAI lists at $10.00 per million input tokens and $10.00 per million output tokens, with a 400,000-token context window. Prices from OpenRouter's catalogue on 2026-09-28.
Structured outputReasoning controlLog probabilities
Cost per 1,000 requests
| Request shape | List cost |
|---|---|
| Classification or routing (600 tokens in, 10 out) | $6.10 |
| Chat reply (2,000 in, 400 out) | $24.00 |
| Retrieval-augmented answer (8,000 in, 500 out) | $85.00 |
Before prompt caching. Try your own shape in the cost calculator.
Can Gimbix route to it first?
Yes. At least one host return token log probabilities for GPT-5 Image, which is the confidence signal Gimbix uses to let a cheaper model answer first.
Cheaper models that can answer first
Models priced below GPT-5 Image that expose a confidence signal. Whether they answer your traffic as well is what a Gimbix pilot measures.
| Model | Input / output per 1M | Cheaper on a chat reply |
|---|---|---|
| GLM 5.3 Prime | $2.80 / $8.80 | 62% |
| GPT Audio | $2.50 / $10.00 | 63% |
| GPT-4o (2024-11-20) | $2.50 / $10.00 | 63% |
| GPT-4o (2024-08-06) | $2.50 / $10.00 | 63% |
| GPT-4o | $2.50 / $10.00 | 63% |
| Qwen3.8 Max (0902) | $2.00 / $6.00 | 73% |
Questions
How much does GPT-5 Image cost?
GPT-5 Image lists at $10.00 per million input tokens and $10.00 per million output tokens on OpenRouter as of 2026-09-28. A typical chat reply of 2,000 input and 400 output tokens costs about $24.00 per 1,000 requests.
What is the context window of GPT-5 Image?
400,000 tokens.
Can a cheaper model replace GPT-5 Image?
Sometimes. Gimbix proves it on your own traffic before routing: the cheaper model must match GPT-5 Image on one half of your requests and make at most three answers worse on the other.