The .si rush is not yet a case for changing your address

All six answers report 44,000 .si registrations in September, compared with fewer than 2,000 in August, including 11,000 on September 30. Those figures come through the supplied answers and comparison. The underlying source pack is not available separately here, so their agreement is not independent verification.

The models agree that the totals cannot establish how many working businesses use .si or how customers understand it. They also describe missing comparison figures for .ai and .com. Even a claim about overtaking those suffixes in registrations therefore remains unsupported.

For lasting brand adoption, GPT-6 Astra chooses active, customer-facing businesses using a suffix as their main address. That measure connects the question to actual use rather than purchases alone. Customer recognition remains a separate question.

The answers explain why investors and businesses can create the same registration surge. A name bought for resale and one bought for a service both enter the total. Astra adds that operating businesses may buy defensive names without using them. Live sites, renewals and registrant interviews could help separate these cases, but none alone proves motive.

For an existing business, most answers favor retaining the main address while trying or holding .si. Their reasoning is that this could explore attention without immediately changing the address customers already know. Grok explicitly warns that even a campaign goes beyond evidence of buyer demand.

Claude draws the boundary earlier. Without comparative customer research or switching-cost information, it will not choose between keeping, switching or campaigning. Its later suggestion to register one defensive domain and monitor activity is a limited monitoring step, not an endorsement of a brand strategy.

This difference matters because the hypothetical business is not described. Preserving customer familiarity assumes there is familiarity to preserve. Treating a campaign as less disruptive assumes costs and staff work that the material does not measure. The majority recommendation is a cautious judgment under uncertainty, not evidence that .si will deliver results.

Without existing customers, the continuity concern is smaller, but recommendations diverge. Grok would still avoid .si as the main address. Astra would compare .ai, .si and .com for customer understanding and intended action before choosing. DeepSeek would allow a .si main address if the brand is explicitly tied to super intelligence.

Mistral calls .com safest, but its claims about recognition are not backed by comparative customer research in the supplied material. DeepSeek’s conditional support likewise assumes that the branding connection can justify the attention benefit. Claude considers the choice unanswerable from this evidence.

The shared branding concern is conditional too. If customers read SI as super intelligence, the models suggest they might expect capabilities beyond those a service provides. That could attract interest while making accurate explanation harder. None reports research showing that customers actually read the initials this way.

The most decision-focused tests compare a limited .si campaign with a similar campaign using the existing address. Astra proposes tracking qualified enquiries, purchases, repeat use, misunderstandings and staff time. These measures address the business choice more directly than registration totals alone.

The distinction is between initial visits and continued, accurately understood demand. A broader change would become more defensible if customer gains persisted and outweighed migration and support work. For worldwide claims, the answers also call for customer and business views beyond the reported setting, including different languages and regions.

The material does not establish either lasting success or a subsequent collapse. Nor does it measure how much of the surge came from speculation or political attention. Those gaps should remain open questions, rather than being filled by a confident explanation.