400+ LLM agents living in a 2004-era MMO server, all local on Qwen3-4B

I wanted a fun way to visualize and stress-test a multi-agent ecosystem, so I pointed it at my favorite MMO (a vanilla-era private server emulator). Live view: https://design.kristiantalley.com/projects/agent-mmorpg Every online character is an agent with its own backstory, goals, and memory. Each one perceives the world, reasons, and issues in-game actions. Click any blip to see what it's thinking and where it's going in real time. Stack: Qwen3-4B (Q4_K_M, 4k context) runs the main agent loop, and Qwen3.8-27B (abliterated, Q4_K_M) handles richer one-on-one interactions. Everything is served through Ollama (llama.cpp) on 2x RTX 3090, with q8_0 KV cache, flash attention, and MTP speculative decoding on the 27B. ~2.5s avg per call. When the queue backs up, low-priority reflections get shed so chat stays responsive. More details on the "how this works" page. I'm curious whether people think 4B holds up for believable behavior, and how you'd handle memory at this scale. submitted by /u/kristiantalley679 [link] [comments]

Source: r/ollama | 2026-09-29