Google Gemini 3.5 Pro Briefly Appears on Arena, Then Removed

Several X users reported that Google's unreleased Gemini 3.5 Pro model briefly appeared on Arena (formerly LMArena). User Harshith shared a screenshot showing the model was removed after about 30 minutes, during which he completed only one SVG test. Arena is a platform where AI models are ranked by real users through blind voting, using Elo scores for text, code, and vision tasks. Google officially launched the Gemini 3.5 series on May 19, 2026, starting with the 3.5 Flash model, and mentioned that 3.5 Pro was already in internal use, planned for release the following month. However, the model has been delayed multiple times, with Google only saying it is testing with partners. This brief appearance might hint that its release is near.