Fedora 45 vs CentOS Stream 10: Versions, Lifecycle and CPU

Fedora 45 and CentOS Stream 10 share an ancestry, since CentOS Stream 10 was branched from Fedora, and they look alike at a shell prompt. They solve opposite problems, though. Fedora ships the newest stable toolchain and lives for about 13 months. CentOS Stream 10 freezes on the RHEL 10 base and runs until May 2030. Pick the wrong one and you will either fight old packages until 2030 or upgrade a server every year.

This comparison puts measured numbers behind that choice: package versions, repository size, lifecycle, the dnf differences that break scripts, and a CPU requirement that stops CentOS Stream 10 from booting at all on older hardware. We ran both in October 2026 on identical 2 vCPU, 4 GB Proxmox VMs built from each project’s official cloud image and fully updated.

Compare the two at a glance

The package versions come from dnf repoquery against each distribution’s stable repositories the same evening, so they show what a fresh install gets today rather than what each project announced at launch. The filesystem, CPU level and support rows come from findmnt, the RPM build flags and each project’s published end-of-life date.

Three things surprise people. Rust, Node.js and Podman are effectively level, because RHEL rebases fast-moving developer tools during a release while it keeps glibc, systemd and the kernel frozen. And both distributions ship newer databases, runtimes and compilers as parallel, versioned packages next to the defaults. On CentOS Stream that closes much of the gap: gcc-toolset-16 carries the same GCC 16.2.1 as Fedora, and postgresql18-server 18.4 was actually newer than Fedora’s PostgreSQL that evening. Fedora has its own set too, such as nodejs24, nodejs26 and postgresql17-server. On top of that, the package count is not close: Fedora’s default repositories hold more than ten times what CentOS Stream ships before you add EPEL.

Pick by lifecycle, not by version numbers

The version gap matters less than how long each install stays supported. Fedora 45’s /etc/os-release carries SUPPORT_END=2027-11-24. A new Fedora lands every six months, so you’ll need a release upgrade about once a year to stay patched. CentOS Stream 10 follows the RHEL 10 full support phase and ends on 2030-05-31, according to the CentOS download page.

CentOS Stream is not a rolling release, despite what older comparisons say. It tracks the next RHEL 10 minor release, so packages move forward in steps a few months ahead of RHEL. The kernel, glibc, systemd and the default database and language streams stay on the same major versions for the life of Stream 10, while newer versions arrive as extra packages beside them. Fedora moves the whole stack every release. Moving from 44 to 45 is a supported in-place upgrade, covered in our Fedora 44 to 45 upgrade guide, but it is still a change you schedule and test.

That makes the decision simple for most servers. Answer two questions first:

• Will anyone upgrade this machine within a year? If not, skip Fedora.
• Do you need Python 3.15 or kernel 7.x features now? If so, skip CentOS Stream 10.

If both answers point the same way, you’re done. If they clash, the lifecycle usually wins, because AppStream’s parallel packages and EPEL can add newer software to CentOS Stream but nothing makes a Fedora release live longer.

Check your CPU before installing CentOS Stream 10

CentOS Stream 10 is compiled for the x86-64-v3 level, which needs AVX2 and the other Haswell-era instructions, while Fedora 45 still targets the plain x86-64 baseline. The build flags show it. With redhat-rpm-config installed, rpm -E '%{optflags}' printed -march=x86-64-v3 on CentOS Stream 10 and -march=x86-64 on Fedora 45.

To see what happens on an older CPU, we switched the CentOS Stream 10 VM to Proxmox’s x86-64-v2-AES CPU model and booted it. The kernel came up. Then the first userspace program died the moment /init started, and the box panicked. This is the serial console from that boot.

[    0.021527] Warning: Deprecated Hardware is detected: x86_64-v2:GenuineIntel:QEMU Virtual CPU version 2.5+ will not be maintained in a future major release and may be disabled
...
[    2.921023] Run /init as init process
Fatal glibc error: CPU does not su[p p o r t2 .x98262-36144-]v Kernel panic - not syncing: Attempted to kill init! exitcode=0x00007f00

The garbled middle is two messages printed over each other: glibc’s “Fatal glibc error: CPU does not support x86-64-v3” and the kernel’s panic line. The same CPU model ran Fedora 45 without complaint, and its loader reported x86-64-v2 (supported, searched) as the highest level the CPU offered.

Check a machine before you plan on CentOS Stream 10. On a system with glibc 2.33 or newer, the glibc loader lists the levels the CPU supports:

/lib64/ld-linux-x86-64.so.2 --help | grep -E 'x86-64-v[234]'

You need x86-64-v3 (supported, searched) in the output. Older systems such as RHEL 8 or Ubuntu 20.04 print nothing there, so check for AVX2, the usual marker of a v3-capable CPU, with grep -o -w -m1 avx2 /proc/cpuinfo. Intel Core CPUs from Haswell onwards and AMD from Excavator onwards generally qualify, and our Skylake i7-6700 host did, but many later Pentium, Celeron and Atom parts lack AVX2. For virtual machines the host CPU is not enough on its own. The VM’s CPU model has to expose AVX2 too. Proxmox’s default CPU type for new VMs is x86-64-v2-AES, the exact model that produced the panic above, so set host or x86-64-v3 before the first boot.

Expect a much smaller repository on CentOS Stream

Out of the box CentOS Stream 10 listed 5,759 package names across BaseOS, AppStream and extras, against 67,229 in Fedora 45’s repositories. Everyday tools are missing: htop, btop, fastfetch and the KDE Plasma workspace all returned nothing from dnf repoquery until we added EPEL.

EPEL needs the CRB repository enabled first, which makes it a two-command job. Our EPEL on RHEL 10 and CentOS Stream 10 guide covers the RHEL side, where CRB is enabled through subscription-manager instead.

sudo dnf config-manager --set-enabled crb
sudo dnf -y install epel-release

With CRB and EPEL on, the count rose to 33,533 and all four of those tools appeared, Plasma included. That is still half of Fedora. EPEL packages are maintained by volunteers on their own schedule, so check that the tools you depend on are actually there before you commit to CentOS Stream.

Python shows the same split. CentOS Stream 10 defaults to Python 3.12 and offers python3.14 as a parallel package. Fedora 45 defaults to 3.15 and carries 3.6 and 3.9 through 3.14 alongside it. That is handy when you test a library against several versions on one box.

Use the right dnf syntax on each

Fedora switched to dnf5 in release 41, while CentOS Stream 10 kept dnf 4, and the two disagree on common commands. Adding a repository is the one that breaks copied scripts. We ran both forms against Docker’s CentOS repo file on each VM and recorded the exit codes.

So a provisioning script that has to handle both needs a branch on dnf --version or on /etc/os-release. The dnf5 config-manager guide and the dnf5 cheat sheet list the other commands whose syntax changed.

Compare the fresh install footprint

Both cloud images boot to a small, server-shaped system with SELinux enforcing and no firewalld installed, so neither is fully locked down until you add a firewall. After a reboot on the same VM size, this is what each one used.

Idle memory is a wash. Don’t read much into the disk figure either: the CentOS VM still held two kernels after its update, and the two filesystems report usage differently, so treat it as a detail rather than a reason to pick one. The filesystem is a real difference, though: Fedora’s Btrfs root gives you snapshots and compression, while CentOS follows RHEL on XFS, which has no snapshot support of its own.

For the desktop side of Fedora, the Fedora 45 vs Ubuntu 26.04 comparison covers GNOME, Flatpak and hardware support, and the Fedora 45 install guide walks through the Server and Workstation installers.

Pick the one that fits the job

Run Fedora 45 on workstations, development boxes and short-lived servers you’re happy to upgrade every year, where the newer default compiler, Python and kernel pay off. Run CentOS Stream 10 on servers that should sit untouched until 2030 and on anything that has to behave like RHEL 10, as long as the CPU passes the x86-64-v3 check and EPEL covers the packages you need. If you need RHEL 10 compatibility on older hardware, neither of these fits: AlmaLinux publishes an x86_64_v2 build of its RHEL 10 rebuild for exactly that case, which this comparison didn’t test.