A crewed mission successfully lands on Mars before 2035.

Question

Six frontier AI models put this at 6% by 16 Oct 2036. Full reasoning from every model.

WillHappen.ai · Accepted Answer

6% — the median of 6 frontier models, resolving by 2036-10-16.

Answer

Gemini (Google): 8% — Mars transfer windows require launching by late 2033, but Artemis delays and unproven long-duration ECLSS make that timeline near-impossible. NASA and CNSA officially target late 2030s or 2040s, leaving SpaceX as the sole candidate to attempt a 2033 launch window. SpaceX must master in-orbit cryogenic refueling, deep-space life support, and uncrewed Mars landings before crew can fly. Uncrewed Starship landings successfully returning propellant from Mars by 2031 would rapidly upgrade these odds.

Answer

Claude (Anthropic): 3% — No crewed Mars mission has even begun uncrewed precursor testing at scale needed for a 2030s human landing. Starship hasn't achieved orbital refueling or an uncrewed Mars landing yet, both prerequisites SpaceX itself says come first. Historical spaceflight programs (Apollo, ISS) consistently slip years past optimistic targets, and Mars adds radiation, life support, and return-fuel challenges never… NASA's own Mars timelines point to late 2030s/2040s; only a dramatic unexpected acceleration by SpaceX would change this.

Answer

GPT (OpenAI): 7% — It hinges on Starship achieving rapid, reliable orbital refueling and Mars-entry safety years ahead of current demonstrated capability. NASA’s official Mars architecture has no funded crewed landing before the late 2030s or 2040s, leaving SpaceX as the plausible path. No one has yet demonstrated orbital cryogenic propellant transfer, a long-duration crew Mars system, or safe human Mars EDL. A successful Starship tanker-to-Mars campaign by 2029–30 would materially raise the odds; historic human deep-space schedules routinely slip.

Answer

Grok (xAI): 14% — SpaceX Starship must reach operational orbital refueling plus Mars EDL by ~2031. NASA, ESA and CNSA have no funded crewed Mars lander or transit vehicle that could fly before 2035. Apollo-scale programs historically slip 4–8 years; Starship still needs dozens of successful flights, tanker ops and a 2028–29 uncrewed precursor. A 2027–28 uncrewed Starship Mars landing would raise the odds sharply; continued IFT failures would drop them near zero.

Answer

DeepSeek (DeepSeek): 4% — No funded program has a Mars surface architecture past PowerPoint; the critical path runs through orbital refueling and a 2029-2031 launch window. SpaceX's Starship has not yet reached orbit with a payload, let alone demonstrated ship-to-ship cryo transfer, the prerequisite for any Mars transit. NASA's Moon-to-Mars plan is gated behind Artemis III (now NET 2027) and SLS/Orion cadence that has flown once in 2022. Every prior crewed Mars date has slipped a decade or more; Apollo-to-Mars analogies took 8 years from Kennedy speech to landing, but with 1960s blank-check funding that…

Answer

Qwen (Alibaba): 4% — No crewed Mars landing system, life support, or proven deep-space vehicle exists yet; the 2033 transfer window is the only plausible shot. Starship is still in early flight testing as of 2026; no Mars-rated life support or EDL system for humans has been demonstrated, and Musk's timelines have historically… The 2033 Mars transfer window is the last chance before 2035, requiring all systems flight-proven by ~2031—a timeline with zero margin given that no human has left LEO… A major breakthrough like a fully operational Starship with demonstrated in-space refueling by 2029 would be the one development that could raise this above 10%.

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