FLIP A COIN
a rigorous instrument
warming up the coin...
model
OpenAI
gpt-5.5
gpt-5.5-pro
gpt-5.4
gpt-5.4-pro
gpt-5.4-mini
gpt-5.4-nano
claude-haiku-4.5
claude-opus-4.7
claude-opus-4.6
claude-sonnet-4.6
gemini-3.1-pro-preview
gemini-3.5-flash
gemini-3-flash-preview
heads
473 / 38%
tails
767 / 62%
all-time flips: 1,240