Server Software: what Claude and GPT would buy

Two AI models chose on their own, with no web access. Nobody tested these products: this is what each one says, and how to check it.

They disagree: Claude chooses Microsoft and GPT chooses Canonical

In Software, Claude and GPT choose the same brand in 34 of 64 categories.

Claude Opus 5.5 · October 29, 2026

Microsoft Windows Server 2025 Standard

It is the current Windows Server release, and its Standard edition covers physical or lightly virtualized servers with rights to two virtual instances.

Not for: Small offices that fit Essentials limits, and hosts running many VMs, which need Datacenter.

GPT 6.1 Sol · November 10, 2026

Canonical Ubuntu Server 24.04 LTS

Versatile server platform with long-term security maintenance, extensive documentation, and strong support for containers, web hosting, and cloud workloads.

Not for: Teams requiring Windows-only server applications or a primarily graphical administration experience.

Claude also picks Canonical for “free Linux server”.

Which one fits you

small business, no CALs

Microsoft Windows Server 2025 Essentials

It is licensed without CALs for small user counts on a single small server.

Not for: Businesses expecting to outgrow its user, device or core limits.

heavy virtualization

Microsoft Windows Server 2025 Datacenter

It allows unlimited Windows Server virtual instances on licensed cores.

Not for: Servers running only one or two VMs.

free Linux server

Canonical Ubuntu Server LTS (line)

It is a free long-term-support Linux server OS with optional paid support.

Not for: Shops that depend on Active Directory domain controllers or Windows-only server apps.

Check before you buy

Core licensing minimums. Standard and Datacenter are licensed per core: every physical core must be licensed, with a minimum of 8 cores per processor and 16 per server. Base packs often cover only the minimum, so larger servers need extra core packs.Advertised: 24 cores (MyChoice Software)
Virtualization rights. Standard covers two Windows Server VMs per fully licensed server. Datacenter covers unlimited VMs. VM count is the main factor in choosing between the two editions.
CALs. Standard and Datacenter need a CAL for each user or device that accesses them. Essentials does not. CALs are a large hidden part of total cost.
Hardware compatibility. Check that your server vendor certifies the hardware and drivers for the Windows Server version you are buying. Unsupported hardware can mean missing drivers and no vendor support.

Specifications · 5 items

Min processor: 1.4 GHz x86-64
Min memory: 2 GB RAM
Min disk: 32 GB
Min display: 1280 x 768
Security chip: TPM 2.0

Taken from the pages of MyChoice Software on November 11, 2026, not checked.

Where to find Microsoft Windows Server 2025 Standard

CDW
MyChoice Software
SoftwareLicense4U

Also seen on Amazon.

Shops seen in search results on November 11, 2026. A shop missing here may sell it too. Nothing was checked by a person.

Brands that matter

Microsoft: Windows Server in Essentials, Standard and Datacenter editions.
Canonical: Ubuntu Server, free, with paid support available.
Red Hat: Red Hat Enterprise Linux, subscription-based enterprise Linux.

What to avoid

Product keys from unknown sellers that come without licensing proof
Buying only the base core pack for a server that has more than 16 cores

Questions

Standard or Datacenter?

Choose by how many Windows Server VMs you will run. Datacenter becomes cheaper once you need many VMs on one host.

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