nakosung (Nako Sung)

Working on AI techs for business as Head of Hyperscale AI in NAVER, Clova AI. Before joining the AI industry, there were many game dev projects I enjoyed. The latest project was Unreal.js.

Turbo Pascal was my first favorite language, but I moved on Turbo C++(MSVC), Python, Lua, Javascript and back to Python for ML.

Current Topics

1. HyperCLOVA X Seed Open-sourcing
   • Our organization recently released new updates to our sovereign foundation model, HyperCLOVA X, including enhanced reasoning capabilities and native support for vision understanding and speech generation.
   • Most importantly, we are open-sourcing a family of compact yet powerful model variants to support the sovereignty movement and accelerate AI transformation for businesses of all sizes in Korea.
   • Stay tuned for a new technical report outlining the architecture, training methodology, multimodal capabilities, and more.
     • News: https://lnkd.in/giaX-Vcq
     • Blog: https://lnkd.in/ggiJYZpQ
     • HF: https://lnkd.in/g_D3S9b7 (Checkpoints coming soon; final touches underway!)
2. HyperCLOVA X THINK Technical Report
   • We recently introduced HyperCLOVA X THINK, the first reasoning-focused large language model in the HyperCLOVA X family.
   • It is pre-trained on roughly 6 trillion high-quality Korean and English tokens, augmented with targeted synthetic Korean data.
   • The model is implemented as a compute-memory-balanced Peri-LN Transformer scaled with μP, pre-trained through a three-stage curriculum that expands the context window to 128K tokens, and post-trained via supervised fine-tuning with Reinforcement Learning from Verifiable Rewards.
   • It delivers competitive performance on Korea-focused benchmarks while preserving robust bilingual consistency and translation quality. A vision-augmented variant matches or exceeds GPT-4.1 on the KCSAT STEM benchmark with substantially lower training compute.
   • We also presented a pruning and distillation technique that will soon be applied to HyperCLOVA X THINK for an open-source and business-friendly foundation model.
     • arXiv: https://arxiv.org/abs/2506.22403

Previous Topics

1. Hyper-scale AI HyperCLOVA
2. Conversational Agents (Chat, Phone, ...)
3. Recommendation Engines (e-Commerce, app, ...)
4. Business Optimization (AI Speaker, e-Commerce, ...)
5. Korean Wordle
6. Financial AI
7. Machine Learning Platform (NSML)
8. Reinforcement Learning (Mini League-of-Legend Multi agent GTC Korea 2015)
9. Auto ML (NSML, Mini LOL)
10. Many game titles (including AVA, Metro Conflict, ...)

Very old topics

1. Game Engines (styx, 2000)
2. Distributed Systems (XIMP, 2000)
3. Robotics (Dual-eyed self driving system, 1995)
4. Chatbot (Sun host, 1992)
5. B.B.S. (Sun host, 1992)