Article Overview
Title: GPT-5: Key characteristics, pricing and model card
Author: Simon Willison
Abstract: Overview of GPT-5's model variants, performance, pricing, safety systems, and placement in AI ecosystem.
Title: GPT-5: Key characteristics, pricing and model card
Author: Simon Willison
Abstract: Overview of GPT-5's model variants, performance, pricing, safety systems, and placement in AI ecosystem.
| Model | Input Price | Output Price |
|---|---|---|
| GPT-5 | $1.25 / M tokens | $10.00 / M tokens |
| GPT-5 Mini | $0.25 / M tokens | $2.00 / M tokens |
| GPT-5 Nano | $0.05 / M tokens | $0.40 / M tokens |
Regular, Mini, and Nano models with multiple reasoning levels.
Output-focused safety method to reduce harmful completions.
Safe-completions: Output-centric safety training.
Reasoning token: Tokens used internally by the model to plan a response.
Set "reasoning": {"summary": "auto"} in your API request body.
Use reasoning_effort=minimal to prioritize streaming speed.
Replay prior conversation data to reuse cached tokens for cheaper calls.