NASA's Psyche spacecraft arrives at the asteroid Psyche in summer 2029.

Question

Six frontier AI models put this at 86% by 28 Oct 2029. Full reasoning from every model.

WillHappen.ai · Accepted Answer

86% — the median of 6 frontier models, resolving by 2029-10-28.

Answer

Gemini (Google): 88% — The trajectory targets August 2029 arrival, hinging solely on electric propulsion reliability and surviving the 2026 Mars flyby. Psyche's planned rendezvous date is August 2029, squarely within the northern summer window of June 21 to September 23. Interplanetary deep space probes that clear initial cruise checkout reach orbital insertion on target roughly 90% of the time. A failure of the Hall-effect thrusters or an anomalous 2026 Mars gravity assist are the main risks that could delay capture.

Answer

Claude (Anthropic): 80% — Arrival hinges on continued nominal electric propulsion performance over the next ~3 years of cruise. NASA's mission timeline explicitly targets August 2029 arrival, squarely within the June-September window. Spacecraft has already recovered from a 2023 thruster anomaly and resumed thrusting nominally, showing resilience. Main risk is a major propulsion or power failure over the long cruise, which would delay arrival outside the window rather than cause mission loss outright.

Answer

GPT (OpenAI): 89% — The key risk is whether Psyche’s electric propulsion and spacecraft health sustain the planned 2029 rendezvous timeline. NASA’s baseline mission schedule targets arrival at 16 Psyche in August 2029, squarely inside the stated window. Deep-space missions often slip after propulsion or power anomalies, but Psyche has resumed planned continuous-thrust cruise operations. A major thruster, solar-array, or navigation anomaly before the 2028 Mars flyby would most likely move arrival outside summer 2029.

Answer

Grok (xAI): 82% — Whether the August 2029 insertion date holds without spacecraft loss or major trajectory slip. JPL must keep Hall-thruster cruise on the post-2023 trajectory whose planned Psyche arrival is August 2029, inside the June–Sept window. Post-launch NASA deep-space success rate is ~85%; Psyche already cleared its software delay and has been thrusting nominally for three years. A propulsion or comms failure in the remaining cruise would most shift the odds; none is indicated as of Oct 2026.

Answer

DeepSeek (DeepSeek): 93% — Whether Psyche's cruise stays healthy through a 2029 Mars-orbit-insertion-style arrival window. Psyche launched October 2023 and completed its Mars gravity assist in May 2026, leaving it on a confirmed cruise to a 2029 rendezvous. Cruise is a deterministic ballistic trajectory with only routine thruster maintenance; no unproven tech or tight margins remain. Deep-space cruise failures are rare, but the 2022 Psyche launch slip shows schedule risk is real; a major propulsion fault would be the main derailer.

Answer

Qwen (Alibaba): 84% — Hinges on whether the ion thrusters and spacecraft systems survive ~3 more years of continuous cruise without catastrophic failure. Planned arrival is August 2029, centered in the Jun 21–Sep 23 window, so trajectory drift alone is unlikely to push it outside. NASA deep-space cruise success rate is high (~90%+), but 3 years of continuous Hall-thruster operation carries non-trivial degradation risk; Psyche carries 4 thrusters… A single unrecoverable thruster or power-system fault would be the most likely failure mode; Dawn survived losing one thruster, but Psyche's longer cruise leaves more…

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NASA's Psyche spacecraft arrives at asteroid Psyche by September 22, 2029.