
Phil B
179 posts



We are committed to pushing the model frontier across cost efficiency, capability, and speed. Starting today, we are reducing prices for GPT-5.6 Luna by 80% and GPT-5.6 Terra by 20% , and offering a faster option for GPT-5.6 Sol in the API. Luna and Terra’s lower prices are reflected in how usage is counted in Codex and ChatGPT Work, so your usage goes further.





Opus 5 is also highly efficient. It outperforms other models for a similar or lower cost per task:



Data centers barely use any water, barely use any land, and they lower electric bills.


ARC Prize 2026: ARC-AGI-3 Milestone Prize #1 Congratulations to the teams who open-sourced the top notebooks on the ARC-AGI-3 public leaderboard: 1. @tufalabs 2. Reki 3. Md Boktiar Mahbub Murad A prize write-up and analysis of the winning solutions will follow.














