OpenAI Reduces GPT-5.6 Luna/Terra Prices, Boosts Sol Speed

OpenAI has introduced substantial updates to its GPT-5.6 model series, focusing on enhancing cost-efficiency, capability, and speed for API users. The company has dramatically cut the price of its GPT-5.6 Luna model by 80% and reduced the cost of GPT-5.6 Terra by 20%. These price adjustments mean that usage of these models within platforms like Codex and ChatGPT Work will now be significantly more economical. Furthermore, OpenAI is rolling out a new 'Fast mode' for GPT-5.6 Sol in the API, which promises up to 2.5 times faster processing speeds compared to the standard option, albeit at twice the cost. This faster mode maintains the same intelligence level, catering to applications where speed is paramount. Additionally, the Auto-review feature in the ChatGPT app and Codex CLI is being upgraded from GPT-5.4 to the more cost-effective GPT-5.6 Luna, expected to reduce its operational cost by approximately tenfold, thereby improving the efficiency of agentic workflows. These changes reflect OpenAI's commitment to making advanced AI more accessible and affordable, passing on efficiency gains to its user base.