Tencent's HY3 Quietly Runs Agent Workflows for 495 Consecutive Steps

A largely overlooked Chinese model release claims to sustain agentic workflows across hundreds of steps — the metric that actually matters for real automation.

Tencent quietly released an AI model capable of running agent workflows for up to 495 consecutive steps, according to @JulianGoldieSEO, who called HY3 'one of the most overlooked AI releases of 2026.' The number worth focusing on is the step count. Most agents degrade within a few dozen steps — losing context, drifting from the original goal, or compounding small errors into task-ending failures. Sustaining coherent execution across nearly 500 steps, if it holds up, is a meaningful engineering claim.

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