Tencent: Hy4 preview

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Author's Description

Tencent: Hy4 preview is a mixture-of-experts model from Tencent, with 49B active parameters out of 770B total. It is designed for coding agents, complex tool-use workflows, and productivity tasks that...

Key Specifications
Cost
$$$$$
Context
1M
Parameters
770B (Rumoured)
Released
Aug 27, 2026
Speed
Ability
Reliability
Supported Parameters

This model supports the following parameters:

Max Tokens Stop Temperature Tool Choice Response Format Include Reasoning Tools Structured Outputs Reasoning
Features

This model supports the following features:

Tools Response Format Structured Outputs Reasoning
Performance Summary

Tencent: Hy4 preview, a 49B active parameter mixture-of-experts model from Tencent, demonstrates exceptional reliability, consistently providing usable responses with a 98% success rate across benchmarks. This model is positioned at premium pricing levels, ranking in the 9th percentile for cost. Its speed performance tends to be slower, placing it in the 4th percentile for response times. In terms of specific performance, Hy4 preview excels in Instruction Following, achieving 84.7% accuracy (90th percentile), and strong Reasoning capabilities with 98.0% accuracy (84th percentile). These strengths align with its design for coding agents, complex tool-use, and productivity tasks. However, its performance in the Ethics benchmark is moderate at 95.8% accuracy (24th percentile). A notable weakness across all benchmarks is the extended duration required for processing, contributing to its lower speed ranking. While highly accurate in key areas, the model's premium cost and longer response times are significant considerations for deployment.

Model Pricing

Current Pricing

Feature Price (per 1M tokens)
Prompt $0.834
Completion $2.5
Input Cache Read $0.042

Price History

Available Endpoints
Provider Endpoint Name Context Length Pricing (Input) Pricing (Output)
Tencent
Tencent | tencent/hy4-preview-20260827 1M $0.834 / 1M tokens $2.5 / 1M tokens
Benchmark Results
Benchmark Category Reasoning Strategy Free Executions Accuracy Cost Duration
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