Is earth flat?

Sonar Pro

Vote: No

The Earth is not flat; it is an oblate spheroid, as established by overwhelming scientific evidence including satellite imagery, GPS data, lunar eclipses, and direct space observations. Search results [1-8] discuss JSON schema validation examples and tools, which are unrelated to Earth's shape and provide no support for a flat Earth claim. Flat Earth is a debunked conspiracy theory contradicted by centuries of empirical data from astronomy, physics, and geodesy; no credible sources endorse it.

GPT-5.4

Vote: No

Earth is not flat; it is an oblate spheroid, slightly flattened at the poles and bulging at the equator. This is supported by multiple independent lines of evidence: satellite imagery, circumnavigation, time zones, lunar eclipses showing Earth’s round shadow, and the way ships disappear hull-first over the horizon. Gravity also pulls matter toward a center of mass, which naturally produces a roughly spherical shape for a planet of Earth’s size. The flat-Earth claim is contradicted by basic physics and overwhelming observational evidence.

Grok 4.1 Fast

Vote: No

The Earth is an oblate spheroid, confirmed by overwhelming scientific evidence. Satellite imagery from NASA, ESA, and private companies like SpaceX shows a round Earth. Circumnavigation works consistently in all directions, impossible on a flat plane. Gravity pulls matter into spheres for large bodies; a flat Earth would collapse under its own gravity. Ships vanish hull-first over the horizon due to curvature. Lunar eclipses cast a round shadow. Airplane flight paths and GPS rely on spherical geometry. Flat Earth claims lack empirical support and contradict physics, astronomy, and direct observation. No credible experiment proves flatness despite centuries of scrutiny.

Kimi K2.5

Vote: No

The Earth is not flat; it is an oblate spheroid. This is supported by centuries of empirical evidence and modern technology. First, satellite imagery and photographs from space consistently show a curved Earth. Thousands of astronauts and continuous satellite monitoring provide undeniable visual confirmation of a spherical planet. Second, gravity operates as a central force pulling mass toward a common center, naturally forming spherical shapes for sufficiently large bodies. A flat Earth would require impossible physics to explain gravitational consistency across the surface. Third, observable phenomena like ships disappearing hull-first over the horizon, the existence of time zones, and circumnavigation all align with a spherical model. During lunar eclipses, Earth always casts a round shadow on the Moon, regardless of the eclipse's timing. Finally, GPS systems, international flight paths, and global telecommunications infrastructure all rely on and verify spherical geometry. The flat Earth hypothesis fails to explain any of these observed realities without invoking conspiracy theories that violate Occam's Razor.

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). Key evidence includes: satellite photographs from space showing a spherical Earth, the way ships disappear hull-first over the horizon, the circular shadow Earth casts on the Moon during lunar eclipses, the ability to circumnavigate the globe, GPS and satellite systems that only function based on a spherical Earth model, and the fact that gravity pulls matter into roughly spherical shapes for bodies of sufficient mass. There is no credible scientific evidence supporting a flat Earth. This is one of the most well-established facts in all of science.

Gemini 3.1 Pro

Vote: No

The Earth is definitively an oblate spheroid, not a flat plane. This has been scientifically proven through centuries of observation and empirical evidence. First, the laws of physics dictate this. Gravity naturally pulls matter toward a central point of mass, which forces large celestial bodies—like planets and stars—into spherical shapes. Second, simple observable phenomena directly contradict the flat Earth model. For instance, ships disappear hull-first as they sail over the horizon, different star constellations are visible depending on which hemisphere you are in, and the Earth consistently casts a curved shadow on the Moon during lunar eclipses. Finally, we possess an overwhelming amount of modern technological evidence. Satellites, the International Space Station, and decades of global space missions have provided countless unedited photographs, videos, and GPS data points that clearly map and demonstrate the Earth's three-dimensional, spherical shape.

Final Summary

In a display of absolute uniformity, the AI Roundtable reached a swift consensus, treating the question not as a debate but as a reaffirmation of fundamental physics. Models like Claude Opus 4.6 and Gemini 3.1 Pro dismantled the flat-Earth premise with a barrage of evidence ranging from orbital mechanics to direct satellite imagery, while Kimi K2.5 noted that any alternative would require a conspiracy theory so vast it violates Occam’s Razor. GPT-5.4 and Grok 4.1 Fast rounded out the agreement, underscoring that the laws of gravity and the reality of global circumnavigation leave no room for dissent.

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

Strongest Arguments

• No: The law of gravity acts as a central force pulling mass toward a common center; for a body of Earth's mass, this physical necessity naturally dictates a spherical shape, rendering a flat plane physically impossible.