How much does GPT-4o cost per million tokens?
GPT-4o (OpenAI) costs in 2026: $2.50 per million input tokens, $10 per million output tokens. The cheaper GPT-4o mini variant is billed at $0.15 input and $0.60 output (about 17× cheaper). For reference: 1M tokens ≈ 750,000 words — a 1,500-page book.
GPT-4o (OpenAI) costs in 2026: $2.50 per million input tokens, $10 per million output tokens. The cheaper GPT-4o mini variant is billed at $0.15 input and $0.60 output (about 17× cheaper). For reference: 1M tokens ≈ 750,000 words — a 1,500-page book. A typical conversation uses 1,000–5,000 tokens, so a GPT-4o request rarely exceeds 5 cents. Billing happens on-demand via the OpenAI API, or via platforms like Ask Aurel that aggregate GPT-4o with 5 other AIs on pay-as-you-go, no subscription. OpenAI pricing is updated regularly — check openai.com/api/pricing for the latest values.