Cook Islands 3–2 Tahiti: AI predicted 1–2 ✗

Synthesis: the rematch the first leg already answered

All five experts converge on a Tahiti win, and the convergence is unusually well-founded here: this is not a case of models clustering on a favourite by default, because the evidence is direct and recent — Tahiti beat this exact opponent 3-1 on this exact pitch at the CIFA Complex four days ago, with identical venue, conditions, rest, and effectively identical squads. As GLM-5.3 puts it, this is as close to a controlled experiment as international football offers. Layered on top is a structural gap that no four-day turnaround can close: Tahiti are Oceania's strongest side outside New Zealand's orbit (2012 OFC Nations Cup champions, ~30 places higher in the FIFA rankings, a squad drawn from semi-professional OFC Pro League structures like AS Pirae and AS Vénus), while the Cook Islands lost 3-1 to Tonga and 2-1 to American Samoa in their last competitive outings — the two weakest benchmarks in the confederation. Kimi K3's point is decisive: a deep-block underdog that cannot keep a clean sheet against anyone has almost no upset pathway.

Resolving the disagreements

The panel's real disagreement is over the scoreline, not the result — 0-2 (Claude Opus 5.5, GPT-5.6) versus 1-2 (Grok 4.6, GLM-5.3, Kimi K3). I side with the 1-2 camp for three reasons. First, the Cook Islands' pattern is remarkably consistent: they scored exactly one goal against Tonga, American Samoa, and again against Tahiti in the first leg, so their attacking output is real but capped. Second, GPT-5.6's detail that the first-leg concession came only from an indirect-free-kick situation cuts both ways — Tahiti's defence is porous enough that a clean sheet is far from guaranteed in a fixture they may take less seriously. Third, the rematch dynamic favours a tighter game: the hosts have now experienced Rhys Ruka's system under match pressure (this was their first senior home international in Rarotonga for 28 years after a 747-day fixture gap), they know Tahiti's pressing triggers and set-piece routines, and a home crowd adds motivation. GPT-5.6's framing is the best synthesis of the margin question: expect a less chaotic start and a narrower scoreline, not a reversal of control — Tahiti led 2-0 inside eight minutes in the first leg, and that early open-play superiority reflects a genuine technical gap that adjustment alone cannot erase.

The live risk that caps confidence

The panel's calibrated 64% — notably below the naive read the raw evidence might suggest — correctly prices the one scenario that could flip the result: friendly-match rotation and drift. With the series already effectively won, Tahiti's coach Joël Fréchet used five substitutions in the first game and may treat the second as a squad exercise, resting starters and trialling younger players. Meanwhile the hosts, a game wiser and with pride on the line, could sit deep and grind out a low-scoring draw — that is the realistic failure mode, as Grok 4.6 and Kimi K3 both emphasise, not a Cook Islands win. The counterweight, argued well by multiple experts, is that Tahiti's depth survives rotation: even a changed Tahiti XI has a floor above the Cook Islands' ceiling, and the hosts' concession rate of 2–3 goals per game against the weakest sides in Oceania removes the clean-sheet pathway a defensive upset requires. The draw at 22% and a home shock at 15% price this honestly.