Unreleased OpenAI GPT-6 Sol Appears on LMArena for Limited Testing

OpenAI's unreleased GPT-6 Sol (Medium) briefly appeared on LMArena's Direct Mode, available for a 24-hour test window until September 29.

2026-09-28 ~ 2026-09-28 · 2 related posts

• GPT-6 Sol appears on LMArena: 24-hour Direct Mode window before Battle and Agent Mode — arena · 2026-09-28
• Unreleased OpenAI model GPT-6 Sol goes live on LMArena, free to test for 24 hours — arena · 2026-09-28