Posts by Chaojun Hou
Introducing Instella-MoE: A State-of-the-Art Fully Open Mixture-of-Experts Language Model
- 24 July 2026
AMD is excited to introduce Instella-MoE, a state-of-the-art fully open Mixture-of-Experts (MoE) language model with 16 billion total parameters and 2.8 billion active parameters. Trained from scratch on AMD Instinct™ MI300X and MI325X GPUs with the AMD ROCm™ software stack, Instella-MoE combines a sparsely activated MoE design with architectural innovations such as Gated Multi-head Latent Attention (Gated MLA) and FarSkip-Collective connectivity. Instella-MoE delivers competitive performance across a broad suite of benchmarks against both dense and MoE baselines (as shown in Figure 1) including models with comparable or larger active parameter counts, establishing it as one of the strongest fully open language models at its scale.
Primus-Pipeline: A More Flexible and Scalable Pipeline Parallelism Implementation
- 23 February 2026
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Resilient Large-Scale Training: Integrating TorchFT with TorchTitan on AMD GPUs
- 08 February 2026
Training large AI models on AMD GPUs demands unwavering stability and robust fault-tolerance capabilities at cluster scale. Yet today’s ROCm-based multi-node GPU deployments often rely on brittle checkpoint-and-restart mechanisms to recover from failures. This approach wastes precious compute cycles and slows down training as model sizes and cluster scales grow. To address these challenges, we integrated PyTorch’s native fault-tolerance framework—TorchFT—with the TorchTitan training framework on AMD’s Primus-SaFE Kubernetes platform, achieving resilient, checkpoint-less training at hundred-GPU scale. This blog builds upon our previous work on the Primus ecosystem—for background on the platform architecture, see our earlier posts on Primus-SaFE, the Primus training framework, and training large models with Primus.
MoE Training Best Practices on AMD GPUs
- 16 December 2025
This blog covers best practices for training Mixture-of-Experts (MoE) models on AMD Instinct™ MI300/MI355-series[a] GPUs with the ROCm ecosystem. Whether you’re new to MoE distributed architectures or optimizing trillion-parameter models, this guide will help you identify bottlenecks and maximize efficiency on AMD hardware.
Stability at Scale: AMD’s Full‑Stack Platform for Large‑Model Training
- 04 November 2025
Training large AI models on AMD GPUs demands unwavering stability and robust debugging capabilities at cluster scale. Yet today’s ROCm-based multi-node GPU deployments often rely on brittle scripts and disjointed tools to launch distributed jobs, monitor performance, and recover from failures. This patchwork approach makes troubleshooting difficult and undermines cluster-wide reliability as model sizes and run times grow.