GPT-5 pricing and routing profile
GPT-5 from OpenAI lists at $1.25 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.
Tool callingStructured outputReasoning control
Cost per 1,000 requests
| Request shape | List cost |
|---|---|
| Classification or routing (600 tokens in, 10 out) | $0.85 |
| Chat reply (2,000 in, 400 out) | $6.50 |
| Retrieval-augmented answer (8,000 in, 500 out) | $15.00 |
Before prompt caching. Try your own shape in the cost calculator.
Can Gimbix route to it first?
Not as a first-answer model through OpenRouter: no host returns token log probabilities for GPT-5. It can still be the model Gimbix falls back to when a cheaper model is unsure.
Cheaper models that can answer first
Models priced below GPT-5 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 |
|---|---|---|
| Qwen3.6 Max Preview | $1.03 / $6.16 | 30% |
| Qwen3 Max Thinking | $0.78 / $3.90 | 52% |
| Qwen3 Max | $0.78 / $3.90 | 52% |
| Grok Build 0.1 | $1.00 / $2.00 | 57% |
| DeepSeek V4 Pro 0423 | $0.955 / $1.91 | 59% |
| Kimi K2.6 | $0.65 / $3.41 | 59% |
Questions
How much does GPT-5 cost?
GPT-5 lists at $1.25 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 $6.50 per 1,000 requests.
What is the context window of GPT-5?
400,000 tokens.
Can a cheaper model replace GPT-5?
Sometimes. Gimbix proves it on your own traffic before routing: the cheaper model must match GPT-5 on one half of your requests and make at most three answers worse on the other.