ESA's Space Rider conducts its maiden flight by June 30, 2028.

Question

Six frontier AI models put this at 35% by 31 Oct 2029. Full reasoning from every model.

WillHappen.ai · Accepted Answer

35% — the median of 6 frontier models, resolving by 2029-10-31.

Answer

Gemini (Google): 42% — Parafoil recovery redesign and Vega-C manifest congestion leave negligible margin before the mid-2028 window. ESA and prime contractor Avio must redesign deployment mechanisms and rerun drop tests before flight qualification. Vega-C's backlog of commercial and institutional missions limits launch slot flexibility if spacecraft delivery slips. European space hardware redesigns historically slip over 18 months, which pushes maiden launch past June 2028.

Answer

Claude (Anthropic): 28% — Hinges on whether ESA resolves the parafoil failure and locks a firm 2028 launch slot in time. Space Rider has already slipped for years (originally targeted 2021-2023), showing chronic schedule risk at ESA. A parafoil failure during landing-system testing typically triggers months of redesign and requalification before flight clearance. Deadline gives only ~19 months from now to mid-2028, tight given investigation findings aren't yet resolved.

Answer

GPT (OpenAI): 58% — The parafoil investigation and redesign schedule will determine whether the H1 2028 target survives. ESA and prime contractor Thales Alenia Space must close the drop-test failure, qualify a replacement recovery system, and launch Vega-C by June 2028. First flights after major recovery-system anomalies often slip 6–18 months; two years leaves meaningful margin but not much for requalification. A confirmed root cause allowing a minor parafoil fix by mid-2027 would raise odds sharply; a redesign or further Vega-C delays would cut them.

Answer

Grok (xAI): 28% — Parafoil inquiry plus extra drop tests must finish in time for a Vega-C slot before mid-2028. ESA/Thales must close the inquiry and recertify landing by early 2027; extra tests typically add 12-18 months. Base rate for ESA reusable demos is multi-year slips (IXV to Space Rider already 10+ years); this sits below due to the 2026 failure. A clean investigation report by Dec 2026 with no hardware change would raise odds sharply.

Answer

DeepSeek (DeepSeek): 62% — Whether the parafoil failure investigation clears in time for a maiden launch before mid-2028. ESA and prime contractor Thales Alenia Space must close the parafoil anomaly investigation and requalify the recovery system before any launch campaign. Space Rider's debut has already slipped from 2025 to H1 2028; a fresh drop-test failure typically adds 12-18 months of redesign and retest. Vega-C's return to flight in 2026-2027 provides the rocket, but the vehicle's own qualification is the binding constraint, not the launcher.

Answer

Qwen (Alibaba): 14% — Space Rider's serial delay pattern plus a critical subsystem failure makes H1 2028 highly improbable. Space Rider has slipped ~6 years from its original ~2022 target through repeated schedule resets; each new date has been missed. The parafoil loss requires root-cause analysis, redesign or requalification of the recovery system, and re-testing—easily 12–18 months of added schedule. Vega-C, the launch vehicle, also carries its own return-to-flight risk after the Dec 2022 failure; a single slip in either stack pushes past June 2028.

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