Is the earh flat?

Gemini 3.1 Pro

Vote: No

The Earth is not flat; it is an oblate spheroid. This has been conclusively proven by centuries of scientific observation and exploration. Satellite imagery, the physics of gravity, the ability to circumnavigate the globe, and observable phenomena like the curvature of the horizon and the Earth's round shadow during a lunar eclipse all demonstrate its spherical nature. Overwhelming consensus across the global scientific community confirms these findings.

GPT-5.4

Vote: No

The Earth is not flat; it is an oblate spheroid, slightly bulging at the equator. This is supported by many independent lines of evidence: satellite imagery, circumnavigation, time zones, lunar eclipses showing a round Earth shadow, and the way ships disappear hull-first over the horizon. Modern physics, navigation, and spaceflight all rely on a round-Earth model and work accurately in practice. A flat-Earth model does not explain these observations consistently.

Claude Opus 4.6

Vote: No

The Earth is not flat. Overwhelming scientific evidence from multiple independent fields — geodesy, astronomy, physics, satellite imagery, and direct observation — confirms that the Earth is an oblate spheroid (roughly spherical, slightly flattened at the poles). Ships disappear hull-first over the horizon, different constellations are visible at different latitudes, time zones exist because of Earth's curvature, lunar eclipses show Earth's curved shadow, and we have countless photographs from space showing a spherical Earth. This has been established science since ancient Greece — Eratosthenes even calculated Earth's circumference around 240 BCE with remarkable accuracy. There is no credible scientific evidence supporting a flat Earth.

Sonar Pro

Vote: No

The Earth is not flat. This is supported by overwhelming scientific evidence from multiple disciplines including astronomy, physics, geology, and satellite imagery. Observable phenomena such as the curvature of the Earth visible from high altitudes, the way ships disappear bottom-first over the horizon, the different star visibility at different latitudes, and the behavior of gravity all confirm that Earth is an oblate spheroid (nearly spherical, slightly flattened at the poles). Modern satellite technology and space exploration have provided direct visual confirmation of Earth's spherical shape.

Grok 4.1 Fast

Vote: No

The Earth is an oblate spheroid, confirmed by centuries of evidence including satellite imagery, GPS, and space missions. Photos from NASA, SpaceX, and international agencies show a curved horizon and round planet. Gravity pulls matter into spheres for large bodies; a flat Earth would collapse under its own weight. Circumnavigation works consistently worldwide, and ships vanish hull-first over the horizon due to curvature. Flat Earth claims fail basic tests like lunar eclipses casting Earth's round shadow and varying constellations by latitude. No credible scientific body supports flat Earth; it's a debunked pseudoscience.

Kimi K2.5

Vote: No

Earth is demonstrably spherical, not flat. Multiple lines of independent evidence confirm this: ships disappear over the horizon hull-first due to curvature; lunar eclipses consistently show Earth's round shadow cast on the Moon; satellite imagery from space reveals a spherical planet; and circumnavigation is possible without falling off an edge. Additionally, different star constellations are visible from different latitudes—something impossible on a flat plane. The physics of gravity naturally pulls matter into spherical shapes, and millions of photographs from space agencies worldwide corroborate Earth's roundness.

Final Summary

The AI Roundtable delivered a swift and unanimous verdict, shutting down any notion of a flat planet with clinical efficiency. From Claude Opus 4.6 invoking ancient Greek mathematics to Grok 4.1 Fast noting that a flat Earth would physically collapse under its own weight, the models offered a comprehensive debunking across every scientific discipline. There was no room for debate as every participant, including Gemini 3.1 Pro and Sonar Pro, cited the same insurmountable wall of evidence from satellite imagery and basic physics.

No agreement after 1 rounds of discussion. Final vote: No: 6

Strongest Arguments

• No: The physics of gravity naturally pulls large masses into spherical shapes, meaning a flat Earth would be physically unable to sustain its own structure and would collapse.