The primary official information about the 2026b release concerns its release schedule and operating system requirements.

• Release Timeline: According to the official platform support roadmap, Thermo-Calc 2026b is scheduled for release in June 2026 . This follows the pattern of two major releases per year (an 'a' release and a 'b' release) .

• End of Support for Windows 10: The most significant confirmed change is that support for Windows 10 will end beginning with the 2026b release . This aligns with the end of official Microsoft support for Windows 10, which occurred in October 2025 . Users on Windows 10 are advised to migrate to a newer operating system, such as Windows 11.

• Linux and macOS Support: The release is also scheduled to be tested on various Linux distributions (like Red Hat Enterprise Linux, openSUSE, and Ubuntu) and newer macOS versions . It's important to note that future support for some very recent operating systems (like RHEL 10 or Ubuntu 26.04) was marked as a target but not yet confirmed at the time of the roadmap's publication .