https://arstechnica.com/information-technology/2024/02/google-upstages-itself-with-gemini-1-5-ai-launch-one-week-after-ultra-1-0/

One week after its last major AI announcement, Google appears to have upstaged itself. Last Thursday, Google launched Gemini Ultra 1.0, which supposedly represented the best AI language model Google could muster—available as part of the renamed "Gemini" AI assistant (formerly Bard). Today, Google announced Gemini Pro 1.5, which it says "achieves comparable quality to 1.0 Ultra, while using less compute."