OpenAI pricing at a glance
| Model | Input $/1M | Output $/1M | Best for |
|---|---|---|---|
| GPT-4o | $2.50 | $10.00 | Established multimodal flagship |
| GPT-5 | $1.25 | $10.00 | Reasoning, 400K context |
| GPT-5.6 Luna | $1.00 | $6.00 | High-volume, low-cost tasks |
| GPT-5.6 Terra | $2.50 | $15.00 | Balanced mid-tier tasks |
| GPT-5.6 Sol | $5.00 | $30.00 | Hardest reasoning tasks |
See OpenAI's official pricing page →
Frequently asked questions
How much does the OpenAI API cost?
GPT-4o is $2.50/$10.00 per million input/output tokens, GPT-5 is about $1.25/$10.00, and the GPT-5.6 family spans $1.00/$6.00 (Luna) to $5.00/$30.00 (Sol). Rates change — verify on OpenAI's pricing page.
Is GPT-5 cheaper than GPT-4o?
GPT-5 is usually cheaper on input tokens despite stronger reasoning and a bigger context window. Your exact savings depend on your input/output ratio — use the calculator above with your real numbers.
Does OpenAI offer batch discounts?
Yes, the Batch API typically cuts prices by around 50% for asynchronous (non-instant) jobs. Toggle "Batch mode" in the calculator to see the effect.
Compare against Claude and Gemini
Want the full picture across providers? Use the universal LLM cost calculator to compare OpenAI against Anthropic's Claude models and Google's Gemini models side by side for the same workload.