OpenAI API
GPT-6 Astra API Pricing 2026 — Cost per 1 Million Tokens
Current GPT-6 Astra API pricing from OpenAI per 1 million tokens, including input, output and cached-token rates when available.
| Model | Rate | Price / 1M tokens |
|---|---|---|
| GPT-6 Astra OpenAI's most capable model for complex reasoning, coding, computer use, research and end-to-end professional work. 1,050,000 context · 128,000 max output · Apr 30, 2026 knowledge cutoff · text/image input · reasoning effort: low, medium, high, xhigh, max. Standard pricing is $10 input, $1 cached input, $12.50 cache write and $50 output per 1M tokens. Requests with more than 272K input tokens are billed at 2x input/cache rates and 1.5x output for the full request. Batch and Flex are 50% of Standard; Fast mode is 2x. Astra is rolling out first to limited organizations, with broader API and paid ChatGPT access over the coming days. | Input — Standard | $10 |
| GPT-6 Astra | Cached input — Standard | $1 |
| GPT-6 Astra | Cache write — Standard | $12.5 |
| GPT-6 Astra | Output — Standard | $50 |
How API token cost is calculated
Multiply the number of tokens by the provider rate, then divide by 1,000,000.
cost = tokens × price per 1M ÷ 1,000,000
Example: 250,000 input tokens at $2 / 1M = $0.50.