Chatbot Arena Rankings Revealed for OpenAI's GPT-5.6 Sol, Terra, and Luna Models

Initial benchmark rankings for OpenAI's GPT-5.6 model family—comprising Sol, Terra, and Luna—have been shared on the Chatbot Arena leaderboards across the Document, Vision, and Text categories. However, the official announcement tweet was cut off, leaving the Text Arena ranking for the budget-friendly Luna model incomplete. These rankings provide the first public, crowd-sourced evaluation of OpenAI's GPT-5.6 family, helping developers assess how the flagship Sol, balanced Terra, and fast Luna models perform against competitors. It highlights the real-world performance trade-offs between OpenAI's newest tiered models across different modalities. In the Document Arena, the mid-tier Terra model surprisingly outperformed the flagship Sol, ranking at #10 compared to Sol's #11, while Luna ranked #18. In the Vision Arena, Sol ranked #14, Terra ranked #25, and Luna ranked #40.