Available through the OpenAI API with usage-based token pricing.
Standard API pricing per 1 million tokens:
Input: $5.00
Cached input: $0.50
Output: $30.00
Requests containing more than 272K input tokens are charged at 2× the standard input rate and 1.5× the standard output rate for the full request.
Cache writes are billed at 1.25× the uncached input-token rate.
GPT-5.6 Sol is also available on eligible paid ChatGPT plans. Availability and usage limits vary by plan, workspace settings, region, and product.
Commercial usage is subject to OpenAI’s applicable service terms, usage policies, and API terms.
