GPT-5 Nano

GPT-5 Nano is cheaper overall here, and the larger gap appears on output pricing rather than input pricing.

• GPT-5 Nano has the lower visible input price in the current snapshot.
• GPT-5 Nano has the lower visible output price in the current snapshot.
• Cached pricing is limited or incomplete for at least one side.

GPT-5 Nano show additional pricing modes in the current snapshot. Final billing still needs to be checked against the official pricing page and the exact mode you plan to use.