#OpenAIGPT5.6

GPT-5.6 family: Consists of three models:
* GPT-5.6 Sol: flagship, most powerful model.
* GPT-5.6 Terra: more balanced/mid-range option.
* GPT-5.6 Luna: speed and low-cost focused option.

* Performance: OpenAI states that GPT-5.6 Sol offers improvements, particularly in software engineering, long-duration agent missions, biology, and cybersecurity studies; and delivers new results in tests such as Terminal-Bench 2.1. (A specific Terminal-Bench result of 91.9% is mentioned in some community posts; it would be more accurate to consider this as an early evaluation result rather than an independently verified overall result.)
* Pricing:
* Sol: $5/million input tokens, $30/million output tokens
* Terra: $2.50/million input, $15/million output
* Luna: $1/million input, $6/million output

* Accessibility: GPT-5.6 is currently not available to general ChatGPT users; It's being offered to select trusted partners via API and Codex as part of a limited preview. OpenAI says it plans to open up wider access in the coming weeks.

So the part about "general users can't use it yet" is true; however, the number "specifically only about 20 partners" is more of a figure reported by news sources than an official statement.

In short: GPT-5.6 = more powerful reasoning + agent capabilities + wider price/performance options; but it's currently in early access.