kat dev

You give Kat Dev a software requirement, a bug or a coding task, and the models answer with code written the way an AI engineer would approach it.

Kat Dev is a family of open source large language models for software engineering, developed by Kuaishou's Kwaipilot team.

It works as an AI code generator and code assistant that you can build into your own developer workflow.

The models come in high-parameter sizes, 32B or 72B, and are trained specifically for coding rather than general chat.

Training included extensive reinforcement learning and multi-stage agentic work covering tool use, multi-turn dialogue and coding knowledge.

The team reports strong results on benchmarks such as SWE-Bench, which tests whether a model can resolve real software issues.

The size is the catch.

Models at 32B and 72B parameters need serious hardware if you plan to run them yourself, so Kat Dev suits teams comfortable with model deployment more than casual users who want a plugin.