Tencent Hy4 is a proprietary reasoning model released in November 2026. It accepts text and images, produces text, and has a context window of one million tokens - enough for roughly 1,573 pages of standard text. On the Artificial Analysis Intelligence Index, which combines nine evaluations of skills such as coding, tool use, knowledge work, scientific research, and reasoning, Hy4 scores 35 and ranks 40th of 69 models. That is below the comparison group’s median score of 37. The results indicate modest overall capability relative to similarly priced models, though the score aggregates varied tasks and may not reflect performance in every use case.
Hy4’s main advantage is its low token pricing: $0.83 per million input tokens and $2.50 per million output tokens, compared with medians of $2 and $10 respectively for its comparison group. It also offers a 95% cache discount. However, its cost and speed per benchmark task are not reported, and no publicly available API is listed, limiting independent verification and practical access. The model used 160 million output tokens across the Intelligence Index evaluations, versus a median of 72.6 million, making it unusually verbose. Overall, Hy4 trades lower benchmark performance and high token use for competitive usage prices, with a very long context window and multimodal input support.
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