
Phoenix — LLM Post-Training at HTX
Shipped12.7% domain gain · 10,000+ personnel · ~20% workflow improvement
Fine-tuned a large language model for legal work at Singapore's Home Team Science and Technology Agency. The models went into AI tooling deployed to over 10,000 public-safety personnel, improving tested workflows by around 20%.
Investigated catastrophic forgetting across LoRA, CPT, and full-parameter SFT, lifting legal-domain performance 12.7% while holding general-capability loss under 3%. Trained across 8× H100s with FSDP2, sequence packing, and fused kernels.


