Crewed lunar landing mission Artemis III lands humans on the Moon before 2029.

Question

Six frontier AI models put this at 27% by 3 Nov 2029. Full reasoning from every model.

WillHappen.ai · Accepted Answer

27% — the median of 6 frontier models, resolving by 2029-11-03.

Answer

Gemini (Google): 27% — Starship HLS orbital refueling and Axiom suit readiness face too many critical-path bottlenecks to make 2028. SpaceX must complete dozens of tanker flights and an uncrewed lunar test before human landing, which rarely scales that fast. Major NASA exploration programs have historically slipped at least two to four years past their mid-stage baseline targets. Demonstrating rapid Starship orbital propellant transfer by late 2027 would sharply increase the odds of a 2028 landing.

Answer

Claude (Anthropic): 12% — Hinges on Starship HLS readiness and uncrewed demo success, both years behind schedule as of late 2026. NASA has repeatedly slipped Artemis III, now officially targeting mid-2027 but SpaceX's HLS still needs orbital refueling demos and uncrewed lunar landing first. Historical pattern shows every Artemis date has slipped 1-3 years from prior projections, and no uncrewed HLS lunar landing has occurred as of late 2026. A successful uncrewed HLS demo and rapid refueling cadence through 2027-2028 would be the main thing that could flip this toward yes.

Answer

GPT (OpenAI): 27% — A 2028 landing depends on Starship HLS reaching proven orbital refueling and landing readiness far faster than its current record. NASA must complete Artemis II, certify Orion/SLS, Starship HLS, suits, and lunar operations in roughly two years after 2026. Artemis III has already slipped from 2025 to at least mid-2027, while HLS needs multiple successful tanker and demo milestones. A flown uncrewed HLS landing and a reliable propellant-transfer campaign by 2027 would materially raise the odds.

Answer

Grok (xAI): 32% — HLS readiness plus Artemis II success in time for a 2027-28 landing window. NASA must fly Artemis II (crewed Orion flyby) first; as of Nov 2026 it has not, so III cannot launch before late 2027 at earliest. SpaceX still needs uncrewed HLS landing plus multiple tanker flights; Starship cadence and refueling remain unproven at scale. Post-Apollo NASA crewed programs routinely slip 18-36 months past announced dates; current hardware gaps put this case below that already-low base rate.

Answer

DeepSeek (DeepSeek): 22% — Whether Starship HLS completes uncrewed lunar demo and orbital refueling in time to support a crewed landing by end of 2028. Artemis III depends on SpaceX's Starship HLS, which has not yet flown a crewed or lunar-landing mission; orbital refueling remains unproven. NASA's own OIG and GAO have repeatedly pushed Artemis III to 2027-2028, and schedule slips have averaged roughly one year per year of development. The 2029 deadline gives ~2 years of slack, but a single failed uncrewed demo or refueling test would likely push the landing past the window.

Answer

Qwen (Alibaba): 37% — Starship HLS orbital refueling demo and Axiom suit certification are the binding constraints on a pre-2029 landing. SpaceX must demonstrate autonomous orbital refueling of Starship HLS, a capability never flown, before any crewed lunar descent attempt. NASA's own OIG and GAO reports through 2025 flagged Artemis III schedule risk at 2+ years beyond official targets; the program has slipped from 2025 to 2026 to 2027+… Axiom Space suits and Orion-HLS integration testing add 12-18 months of sequential work after HLS is flight-ready, compressing the window to early-to-mid 2028 at best.

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