Southeast Asia faces binary choice as US and China weaponise AI blocs

The United States State Department has prepared a draft letter warning 35 countries that joining competing artificial intelligence initiatives while participating in the American-led Pax Silica framework may jeopardise their access to advanced AI infrastructure and supply chains. The letter, which stops short of naming China, states that membership in the U.S. initiative requires a dedicated commitment rather than simultaneous participation elsewhere.

The warning arrives as China formalises its own AI bloc through the World Artificial Intelligence Cooperation Organisation (WAICO), launched in Shanghai in July 2026 with 29 founding members, including several Southeast Asian states. The draft signals that Washington now views technological non-alignment as incompatible with access to its AI supply chain, a position that has no clear precedent in the region’s diplomatic history.

Washington made a version of this offer to allies during the Cold War — security guarantees in exchange for keeping adversary technology out of critical infrastructure. The bargain held for decades because the technology was largely military and the bloc lines were clear. The draft letter now circulating through the State Department transposes that logic onto artificial intelligence supply chains, and the countries being asked to choose are not treaty allies but Southeast Asian states that have built their postwar prosperity on refusing to choose at all.

The letter warns 35 governments that participation in Pax Silica — the U.S. initiative for secure AI supply chains covering semiconductors, critical minerals, and model technologies — requires a dedicated commitment rather than simultaneous participation in competing initiatives. It does not name China. It does not need to. The World Artificial Intelligence Cooperation Organisation, established in Shanghai on July 16, 2026, already counts 29 countries as founding members, including Indonesia, Malaysia, Cambodia, Laos, and Myanmar. The U.S. is telling those countries, and any others considering joining, that the era of hedging on critical technology is over.

The demand is not subtle. The mechanism is not yet clear. But the meaning is: non-alignment, the organising principle of Southeast Asian statecraft for half a century, has reached its limit in AI.

The line Washington is drawing, and the one Beijing already crossed

Pax Silica, launched by the State Department in December 2025, is described in official material as a flagship effort to build secure, innovation-driven supply chains from critical minerals and energy inputs through advanced manufacturing and semiconductors to AI infrastructure and logistics. By mid-2026, the AI Opportunity Statement — a non-binding political instrument that commits signatories to aligning their AI supply chains with the United States and Pax Silica economies — listed 34 countries and the European Union as signatories, including Singapore, the Philippines, Japan, Australia, South Korea, Qatar, the United Arab Emirates, and other partners.

The draft letter now circulating among those signatories, according to reports, warns that the commitment required is exclusive. Ryan Fedasiuk, a fellow at the American Enterprise Institute, puts the logic bluntly. “[Third countries] cannot be in China’s AI orbit while also advancing…a shared non-Chinese AI stack,” he said. The architecture Washington envisions is a full-stack AI supply chain independent of China, and the letter signals that dual membership will be treated as incompatible with that goal.

China’s counter-architecture took institutional form in Shanghai on July 16, 2026, when 29 countries signed the founding agreement for WAICO. The organisation promotes open-weight AI models and capacity-building for developing countries, with pledges of training and application centres. Mohammed Soliman, a senior fellow at the Middle East Institute, describes the two blocs as rival geo-technological architectures — Pax Silica exclusive, supply-chain-centred, and built around trusted security allies; WAICO China-led, open-membership, oriented toward the Global South, and focused on AI norms and governance.

The membership overlap is already visible in Kazakhstan, which appears on both the Pax Silica signatory list and the WAICO founding agreement. It is the only known country to hold dual membership, and it is being watched closely. The pressure points across Southeast Asia are distributed differently.

The competing pressures and leverage points are easier to see than describe.

For a procurement manager at a mid-sized Western semiconductor firm, a supplier in Malaysia joining WAICO is not a geopolitical abstraction. It is a compliance questionnaire that suddenly has no clear answer. Tuhu Nugraha, a researcher on Southeast Asian digital policy, argues that countries like Indonesia and Malaysia are pursuing layered alignment across multiple frameworks, turning fragmented AI strategies into a potential geopolitical asset — if backed by regional rules and interoperability.

The draft letter does not spell out the enforcement mechanism. Without one, the threat is a signal, not yet a policy. But the signal is aimed at governments that have spent decades treating diplomatic ambiguity as a strategic resource.

The architecture that leaves no room for ambiguity

Washington’s leverage flows through non-binding but politically weighty instruments like the AI Opportunity Statement, reinforced by Pax Silica’s project pipelines and export-control coordination. These give the U.S. bureaucracy authority to condition investment, technology sharing, and participation in AI-linked initiatives on partners’ alignment choices. The draft letter is the moment that authority is being made explicit.

ASEAN, by contrast, operates through consensus-based economic mechanisms. The Digital Economy Framework Agreement (DEFA), endorsed by leaders in September 2023 and targeted for signature at the November 2026 ASEAN Summit, is expected to provide binding regional rules on data flows, digital trade facilitation, and emerging issues such as AI. Once signed, it would give ASEAN a collective floor for negotiating with both Pax Silica and WAICO. But the agreement does not directly dictate security alignment, and the membership patterns are already diverging.

Indonesia, Malaysia, Cambodia, Laos, and Myanmar have signed up as WAICO founding members. Singapore and the Philippines are tied into Pax Silica. Thailand and Vietnam currently stand outside both initiatives, and can leverage that distance in tariff and security talks. These asymmetries make a fragmented ASEAN response likely, with some states deepening U.S. ties while others test how far dual or China-leaning participation can go without triggering penalties.

The U.S. policy is now codified through Pax Silica and the AI Opportunity Statement, which together present an economic-security coalition that implicitly discourages participation in competing frameworks. European Union institutions have joined as signatories, signalling alignment with its supply-chain and governance aims. The Chinese Embassy in Washington has publicly opposed efforts to politicise trade and technology, arguing that exclusionary AI coalitions would stifle global advances and insisting that China’s initiatives seek cooperative governance. The two positions leave no middle ground.

The draft letter is Washington’s attempt to close that ground before it becomes institutionalised. The next ASEAN summit will show whether the region has a collective answer, or whether the answer is already being written in separate capitals.

Beyond the headline

The bigger picture

What is emerging is not simply a U.S.–China tug-of-war over chips, but a contest to export entire institutional blueprints for how AI economies should work. Pax Silica and WAICO each bundle standards, financing channels, and governance expectations. Southeast Asian states are discovering that once these architectures are embedded in ports, data centres, and cloud contracts, the practical room for non-alignment shrinks, even if formal neutrality is maintained.

The power behind it

Control over this contest sits less with foreign ministries than with the agencies that manage export controls, digital standards, and economic security portfolios. In Washington, technocrats defining what counts as a trusted AI supply chain shape which partners are acceptable. In Beijing, planners deciding where WAICO training centres and model access are granted determine who can realistically stay outside a Chinese AI orbit, regardless of diplomatic rhetoric.

The timing

The U.S. ultimatum draft surfaces just as WAICO crystallises into a formal organisation and ASEAN moves DEFA toward signature. That sequencing matters: once WAICO memberships and DEFA rules are locked in, attempts to force binary choices will collide with existing commitments. The letter is therefore not only about current alignments; it is an effort to influence institutional paths before they become difficult to unwind over the next two to three years.

What the end of AI non-alignment means for you

With the U.S. draft letter drawing a line and Southeast Asian governments choosing sides, Western businesses, investors, and citizens with exposure to the region face a set of decisions that did not exist a year ago.

• Western semiconductor procurement manager

  You need to map your Southeast Asian suppliers’ alignment status immediately. A supplier in a WAICO member state may face U.S. export-control friction or compliance complications as Pax Silica’s project pipelines tighten. Start with the State Department’s AI Opportunity Statement page to identify which countries are currently aligned with the U.S. vision, and cross-reference with WAICO’s declared membership. The gap between the two lists is where your compliance risk lives.

• US-based investor with APAC emerging market exposure

  Reassess your portfolio’s country-level exposure against this emerging alignment map. Pax Silica-aligned markets like Singapore and the Philippines may see increased U.S. investment and technology access, while WAICO members like Indonesia and Malaysia could face conditional access to advanced semiconductors and AI-linked projects. Monitor ASEAN economic ministries’ communications on DEFA in the lead-up to the November 2026 summit; a strong agreement could cushion some of the binary pressure, but a weak one will leave each market to negotiate alone.

• European tour operator with Southeast Asia packages

  The fracturing of ASEAN’s common front may not immediately affect travel logistics, but a deterioration in regional stability — or the imposition of technology-related sanctions on specific countries — could shift travel advisories and visa policies. Watch for any U.S. or EU export-control actions that target specific Southeast Asian states, as these often precede broader diplomatic friction that can affect tourism sentiment and operational safety perceptions.

• Western parent of a university student in Southeast Asia

  Your child’s host country’s alignment choice could affect the academic environment, particularly if the campus relies on international research collaborations or access to Western AI tools. Check your home country’s travel advisories for any technology-related warnings, and monitor whether the host government’s alignment triggers restrictions on academic exchanges or digital infrastructure. The November 2026 ASEAN summit will be a telling indicator of whether regional stability holds or individual countries drift further into bloc-specific dependencies.

Explainer

Pax Silica

A U.S. State Department-led initiative launched in December 2025 to build secure, innovation-driven AI supply chains spanning critical minerals, semiconductors, and model technologies. It functions as an economic security coalition that ties participation to alignment with U.S. supply-chain and governance expectations. The initiative’s name evokes the Pax Romana, casting silicon as the strategic resource underpinning a new technological order.

WAICO

The World Artificial Intelligence Cooperation Organisation, established in Shanghai on July 16, 2026, with 29 founding members, primarily from the Global South. It promotes China’s open-weight AI models and provides a governance platform for capacity-building, training, and application centres. WAICO represents China’s institutional response to U.S.-led AI coalitions, bundling standards and financing with diplomatic outreach.

DEFA

The ASEAN Digital Economy Framework Agreement, a binding regional treaty being negotiated by ASEAN member states to govern data flows, digital trade facilitation, and emerging issues such as AI. Endorsed by ASEAN leaders in September 2023, it is expected to be signed at the November 2026 ASEAN Summit. If concluded with robust provisions, DEFA could give ASEAN a collective negotiating tool against bilateral AI-bloc pressure.

AI Opportunity Statement

A non-binding political instrument published by the U.S. State Department in August 2026 that commits signatory governments to a pro-growth, pro-innovation regulatory environment and to aligning their AI supply chains with the United States and Pax Silica economies. It does not create treaty obligations but establishes a shared vision and common purpose, while implicitly discouraging participation in competing frameworks.