assistant: This is a high-stakes query, so let me ask one clarifying question before I lock in a pick: **Have you raced in a carbon-plated super-shoe before, or will this be your first?** That matters because some of these racers reward aggressive cadence and firm feel (which can be a shock if you're used to daily trainers), while others are more forgiving at marathon pace. That said, here's what I'm seeing in your profile: sub-3 is 6:52/mi pace, you're a midfoot striker at a solid weekly volume, and at 65kg you're in the sweet spot for these shoes weight-wise. All six of these are current carbon racers, so the question is really which one matches your foot strike and race-day feel preference. **Quick context while you think:** The Deviate Nitro Elite v4 and Vanish Carbon v2 are the standouts here. The Deviate rewards cadence and firm response (EDDBUD calls it "more traditional carbon plate racer"), while the Vanish is zero-drop with a wider forefoot — a different geometry entirely. The HOKA Cielo X1 v3 is maximal stack (48/41mm) and well-regarded but narrow in the toe box. The others (Metaspeed Sky Tokyo, Hyperwarp Elite, SC Elite v5) are solid but the data on them is thinner. Once you tell me whether you've worn a super-shoe before, I'll narrow it down to 2–3 picks calibrated to your midfoot strike and sub-3 target.

assistant: **Alphafly 3 for your sub-3 marathon.** The Vaporfly 4 has shifted into the half-marathon-and-below racing pond — it's lighter and snappier, but Doctors of Running flagged fit issues (snugger toe box, potential heel slippage) and reduced outsole rubber that hurts durability over 26.2 miles. For a sub-3 attempt, you need a shoe that rewards your midfoot strike without punishing form drift late in the race. The Alphafly 3 is built for marathon distance. EDDBUB calls it "a more fitting shoe all around" with a softer, more cushioned feel that begs you to land on the heel — which works well for midfoot strikers because it gives you a stable platform without forcing you into an unnatural pattern. Ben Is Running notes it felt "effortless at marathon pace" during a 15 × 1K workout, and the shoe gets better with use, making it durable enough for long Sunday runs and race day. At 40/32mm stack (vs. Vaporfly's 36/30mm), you get more cushion and forgiveness when fatigue sets in around mile 20. The trade-off: Vaporfly is 31g lighter (167g vs. 198g) and has that old-school racing feel that rewards aggression. If you're a confident, hard-charging runner who thrives on direct ground feel and wants to attack the race from mile 1, Vaporfly could work — but the fit warnings and durability caveat make it riskier for a sub-3 attempt where consistency matters more than raw speed. **One follow-up:** How do you typically feel in the final 5–10K of a long run? Do you want maximum cushion and forgiveness, or do you prefer a firmer, more responsive platform even when tired?