Hunyuan 3 (Tencent Hy3) vs Codex (OpenAI)
Which one should you pick? Here's the full breakdown.
Hunyuan 3 (Tencent Hy3)
Tencent's Hy3 Preview launched 2026-04-23 -- 295B total / 21B active MoE, 256K context, open-sourced on HuggingFace under tencent/Hy3-preview. Cheapest frontier-class API at ~1.2 RMB per million input tokens. Integrated into Yuanbao, WeChat, QQ
Codex (OpenAI)
OpenAI's cloud-based coding agent -- runs parallel tasks, proposes PRs, and lives inside ChatGPT
Powered by GPT-5.2-Codex (default 2026-04-23) / GPT-5.5 / GPT-5.4
| Category | Hunyuan 3 (Tencent Hy3) | Codex (OpenAI) |
|---|---|---|
| Ease of Use | 7.0 | 8.0 |
| Output Quality | 8.0 | 8.0 |
| Value | 9.5 | 8.0 |
| Features | 8.0 | 9.0 |
| Overall | 8.1 | 8.3 |
Pricing Comparison
| Feature | Hunyuan 3 (Tencent Hy3) | Codex (OpenAI) |
|---|---|---|
| Free Tier | Yes | Yes |
| Starting Price | $0 | $0 |
Benchmark Head-to-Head
GPT-5.2-Codex (launched 2026-04-23 -- SOTA on SWE-Bench Pro and Terminal-Bench 2.0; first-party scores below pending detailed third-party verification) benchmarks — Hunyuan 3 (Tencent Hy3) has no published benchmarks
| Benchmark | Description | Score |
|---|---|---|
| SWE-bench | Real GitHub issue fixing | 72% |
| HumanEval | Python code generation | 95% |
Which Should You Pick?
Pick Hunyuan 3 (Tencent Hy3) if...
- ✓Better value for money (9.5/10)
Chinese-market builders, multilingual products that need strong CN performance, and cost-sensitive developers who want frontier-class quality at sub-DeepSeek pricing. Also anyone watching the open-weights field who wants Tencent's distribution-backed entry on the bench.
Visit Hunyuan 3 (Tencent Hy3)Pick Codex (OpenAI) if...
- ✓Easier to use (8 vs 7)
- ✓More features (9 vs 8)
Developers already paying for ChatGPT Plus who want a coding agent at no extra cost. Especially good for parallel task execution -- assign multiple bug fixes or feature branches and let Codex work them simultaneously.
Visit Codex (OpenAI)Our Verdict
Hunyuan 3 (Tencent Hy3) and Codex (OpenAI) are extremely close overall. Your choice comes down to specific needs -- Hunyuan 3 (Tencent Hy3) is better for chinese-market builders, multilingual products that need strong cn performance, and cost-sensitive developers who want frontier-class quality at sub-deepseek pricing, while Codex (OpenAI) works best for developers already paying for chatgpt plus who want a coding agent at no extra cost.