Humans land on Mars before 2035.

Question

Six frontier AI models put this at 12% by 1 Oct 2036. Full reasoning from every model.

WillHappen.ai · Accepted Answer

12% — the median of 6 frontier models, resolving by 2036-10-01.

Answer

Gemini (Google): 14% — Landing requires Starship orbital refueling, long-duration ECLSS, and a launch in the late-2033 synodic window at the latest. NASA targets the late 2030s or 2040s, leaving SpaceX as the sole candidate capable of attempting the 2033 transit window. Starship must first demonstrate orbital propellant transfer and human lunar landing for Artemis before attempting Mars. A rapid series of uncrewed Starship Mars landings succeeding in 2028 and 2031 would be required to clear human flight by 2033.

Answer

Claude (Anthropic): 3% — No crewed Mars hardware exists yet; a 2035 landing requires feats never attempted, on a timeline under nine years. SpaceX Starship hasn't achieved orbital refueling or a crewed lunar landing yet, both prerequisites for Mars ambitions. NASA's own roadmap targets Mars missions in the 2030s-2040s with no funded crewed architecture, and historical spaceflight programs always slip years to decades. Only a dramatic acceleration like a successful uncrewed Starship Mars landing by 2028-2029 plus rapid crew-rating would change this outlook.

Answer

GPT (OpenAI): 12% — A 2034-or-earlier landing requires a funded, flight-proven Mars architecture by roughly 2030, which no actor has yet. NASA’s official human-Mars horizon remains the late 2030s or 2040s, after Artemis lunar systems mature. SpaceX is the only plausible faster path, but Starship still needs rapid reusable orbital operations, refueling, and life-support validation. A successful crewed lunar Starship mission by 2029 plus sustained on-orbit refueling would materially raise the odds.

Answer

Grok (xAI): 18% — SpaceX Starship must nail refueling, reliability and a 2028-33 crewed window. NASA and China lack funded architectures and already slip Artemis/Moon dates past mid-2030s. SpaceX needs dozens of flights plus uncrewed 2028/30 cargo landings; Musk dates have slipped 5-10 yrs. A 2028-30 uncrewed Starship Mars touchdown would be the clearest upward revision.

Answer

DeepSeek (DeepSeek): 12% — This turns on whether Starship reaches Mars orbit and back with crew before 2035, which is a schedule problem, not a physics one. NASA's own Artemis/Mars planning documents put crewed Mars in the late 2030s or 2040s; no funded program currently targets a landing before 2035. SpaceX's Starship has not yet completed an orbital refueling demonstration or an uncrewed Mars landing, both prerequisites that must clear years before crew. The base rate for crewed first-landings slipping past announced dates is near-total (Apollo, Shuttle, ISS, Artemis), and every current Mars timeline already sits at or…

Answer

Qwen (Alibaba): 3% — Even SpaceX's most optimistic timeline puts first uncrewed Starship Mars attempts no earlier than 2026-2028, leaving no margin for crew. Mars transfer windows open ~every 26 months; next viable windows are late 2026 and early 2029, with transit taking 6-9 months. No uncrewed Mars landing has ever been attempted by a private entity; Starship has not yet reached orbit as of mid-2025, let alone demonstrated deep-space refueling or… A crewed Mars mission requires life support, radiation shielding, and return capability—none flight-tested; NASA's own Artemis-to-Mars roadmap targets late 2030s at…

Humans land on Mars before 2035.

NASA's Swift Observatory reenters Earth's atmosphere within weeks of October 2026.

Crew-12 undocks from the International Space Station on October 7, 2026.

SpaceX completes three orbital launches within a 13-hour window on October 1, 2026.

Weather conditions permit the launch of NASA's Crew-13 mission on October 1, 2026.