Houthi forces enter the city of Aden.

Question

Six frontier AI models put this at 8% by 1 Feb 2027. Full reasoning from every model.

WillHappen.ai · Accepted Answer

8% — the median of 6 frontier models, resolving by 2027-02-01.

Answer

Gemini (Google): 8% — Aden is heavily fortified by Southern Transitional Council forces and backed by UAE/Saudi airpower that Houthis cannot break quickly. Breaching 80 km of hostile, mountainous southern terrain defended by entrenched STC brigades requires months of major offensive warfare. A full-scale push south would trigger direct Saudi and Emirati airstrikes, repeating the decisive 2015 coalition intervention that ousted them. A total collapse of STC cohesion or a formal US-Saudi complete disengagement from southern defense would spike odds toward 40%.

Answer

Claude (Anthropic): 7% — Hinges on whether Houthi forces can break through Saudi/Yemeni government and coalition-backed defensive lines around Aden before Feb 2027. Aden has been held by internationally recognized government/STC forces since 2015 with coalition air support as a hard deterrent. Houthis have been stalled near Marib/al-Dhale fronts for years; 80km proximity reflects static frontlines, not momentum toward Aden. A sudden collapse of government forces or coalition withdrawal would be the main trigger, but no signs of that are currently visible.

Answer

GPT (OpenAI): 7% — This turns on whether the Houthis can breach southern defensive lines and sustain a major coastal offensive before February. Aden is held by UAE-backed southern forces and Yemeni government units, which have repeatedly repelled Houthi drives since 2015. Comparable Houthi advances toward Aden have stalled short of the city; taking it would require supply, air-defense, and local-force breakthroughs. A collapse of STC/government cohesion or a major reduction in Saudi/UAE support would sharply raise the odds.

Answer

Grok (xAI): 18% — Houthis punching 80 km through STC/gov lines into Aden before 1 Feb. Houthis must take Lahij then Aden city limits in ~90 days against entrenched southern forces. Post-2015 they have never broken into the south; coalition air power and STC cohesion have held. A sudden STC fracture or complete Saudi/UAE withdrawal would be the only rapid game-changer.

Answer

DeepSeek (DeepSeek): 8% — This turns on whether the Houthis can break the Taiz-Lahj front and reach Aden before February 2027. The Houthis have not held Aden since 2015, when a Saudi-led coalition expelled them after the Battle of Aden. Any new push would require breaking the front lines around Taiz and Lahj, where anti-Houthi forces have held for a decade. The most likely trigger would be a sudden collapse of the internationally recognized government or a major Saudi withdrawal.

Answer

Qwen (Alibaba): 37% — Turns on whether STC defensive lines around Aden hold without active Saudi air support. 80 km is close but Aden's defenders (STC) have fortified positions; the 2015 Houthi push into Aden was reversed by coalition airpower. Saudi-Houthi rapprochement since 2023 reduces likelihood of decisive coalition air intervention that previously stopped Houthi advances. A collapse of STC cohesion or a negotiated surrender of outer defenses would be the development most likely to push this over 50%.

Houthi forces enter the city of Aden.

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