# Hy3 preview is Tencent's first model after a full infrastructure rebuild.

*genai · news · 2026-04-23 · Decrypt*

## Key points

- Tencent's Hy3 preview model uses 295B parameters with 21B active via Mixture-of-Experts architecture.
- Hy3 preview achieved 74.4% on SWE-bench Verified, a 40% jump over Hy2's 53.0%.
- Hy3 supports 256,000 token context length, enough to process a full-length novel per prompt.
- Training began in January 2026, open-sourced under three months after a major infrastructure rebuild.
- Tencent Cloud offers Hy3 API access at $0.18 per million input tokens and $0.59 per million output tokens.

**Companies:** Tencent
**Countries:** China

[Read the full story on Decrypt](https://decrypt.co/365297/tencent-hy3-preview-open-source-moe-model)

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