Gemini 3.1 Flash 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 Gemini 3.1 Flash and Hunyuan Pro.
Gemini 3.1 Flash
Gemini 3.1 Flash is Google's high-speed, cost-efficient multimodal model in the 3.1 generation, purpose-built for high-volume content synthesis, classification, and intelligent routing at scale. Featuring a 1-million-token context window, it can process large batches of documents, customer data, or multimedia content in a single inference pass, dramatically reducing pipeline complexity. At just $0.25/MTok for input, it is one of the most affordable routes to Google-caliber multimodal AI, making it an ideal backbone for production pipelines, data enrichment workflows, and high-frequency API integrations.
Hunyuan Pro
Hunyuan Pro (ๆททๅ 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 | Gemini 3.1 Flash | Hunyuan Pro |
|---|---|---|
| Provider | Tencent | |
| Context Window | 1,000,000 tokens | 256,000 tokens |
| Agent Suitability | 86/100 | 85/100 |
| Time to First Token (TTFT) | 150 ms | 320 ms |
| Deployment Model | managed api | managed api |
| Production Stability | stable | stable |
| API Available | Yes | Yes |
| Released Date | 2026-04-20 | 2025-11-01 |
API Pricing Comparison
Input Price per Million Tokens
Gemini 3.1 Flash
$0.25
Hunyuan Pro
$0.60
Output Price per Million Tokens
Gemini 3.1 Flash
$1.50
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.
Gemini 3.1 Flash Quirks & Gotchas
- โธMost cost-effective Google model โ ideal for high-volume pipelines
- โธContext caching available via Vertex AI for repeated document processing
Hunyuan Pro Quirks & Gotchas
- โธMassive daily inference volume โ battle-tested at WeChat scale
- โธAPI available through Tencent Cloud โ requires Chinese enterprise account