Sep 17, 2025 Model
Introducing List 1.0 Ultra Coder
Where the Ultra Coder line began
List 1.0 Ultra Coder was our first model tuned end to end for code: completion, explanation, and bug fixing across the most-used languages.
It set the template every later Ultra Coder follows.
Tuned for code
Training weighted real repositories, issues, and fixes — so answers look like senior-developer output, not textbook snippets.
Explains as well as writes
Every suggestion can unpack its reasoning in plain language, which made it a favorite for onboarding and code review.
Legacy and support
Superseded by 2.0 and 3.0 for new projects, 1.0 remains available for pinned production workloads.