GPT-5.5 Pro vs Hunyuan Pro
How do these models stack up? Below is an expert side-by-side comparison of specifications, context window capacity, live pricing per million tokens, and standardized benchmark scores for GPT-5.5 Pro and Hunyuan Pro.
GPT-5.5 Pro
GPT-5.5 Pro is OpenAI’s high-capability model optimized for deep reasoning and accuracy on complex, high-stakes workloads. It features a 1M+ token context window (922K input, 128K output) with support for...
Hunyuan Pro
Hunyuan Pro (混元 Pro) is Tencent's flagship large language model developed by Tencent AI Lab, designed to power AI features across Tencent's vast ecosystem including WeChat, QQ, and enterprise cloud services. It achieves top-tier performance on Chinese-language benchmarks and strong multilingual capabilities, with native support for text, image, and video understanding. Hunyuan Pro is deployed at massive scale across Tencent's advertising, content recommendation, and customer service systems, processing billions of inference requests daily.
Technical Specifications
| Specification | GPT-5.5 Pro | Hunyuan Pro |
|---|---|---|
| Provider | OpenAI | Tencent |
| Context Window | 1,050,000 tokens | 256,000 tokens |
| Agent Suitability | 98/100 | 85/100 |
| Time to First Token (TTFT) | 450 ms | 320 ms |
| Deployment Model | managed api | managed api |
| Production Stability | beta | stable |
| API Available | Yes | Yes |
| Released Date | 2026-04-24 | 2025-11-01 |
API Pricing Comparison
Input Price per Million Tokens
GPT-5.5 Pro
$30.00
Hunyuan Pro
$0.60
Output Price per Million Tokens
GPT-5.5 Pro
$180.00
Hunyuan Pro
$1.20
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Benchmark Performance Metrics
Scores show the raw performance percentages verified across key evaluation suites. Higher bars indicate superior accuracy and capability in that domain.
GPT-5.5 Pro Quirks & Gotchas
- ▸Best-in-class instruction following for complex agentic chains
- ▸Premium pricing — use GPT-5 for cost-sensitive workloads
Hunyuan Pro Quirks & Gotchas
- ▸Massive daily inference volume — battle-tested at WeChat scale
- ▸API available through Tencent Cloud — requires Chinese enterprise account