Hy4
A large language model in Tencent's Hunyuan series and the first model in the Hy series to support vision. It provides reasoning, tool calling, structured output and Computer Use capabilities, with a context window of up to 1 million tokens.
Timeline (last 90 days)
Hy4 received specialized training for software such as Blender and CAD.
Hy4 still lags behind closed-source flagship models such as GPT 6.1 and Claude Opus 5.5.
Officials say Hy4 surpasses models such as DeepSeek, V4.1, and Flash in tests including code editing and automation.
The Hy3 series has fewer than 300B parameters, and Hy4 was upgraded from Hy3 to 770B.
Tencent officially released the open-source large model Hy4, with 770B parameters.
Kimi K3.1 and Tencent's Hy4 are two newly released open-source models, both of which have had capabilities related to cybersecurity, reverse engineering, and vulnerability patching stripped from the models.
The current observations about Kimi K3.1 and Tencent Hy4 stripping security capabilities mainly come from a single community source (Reddit) and have not yet been officially confirmed.
The Hacker News entry about Hy4 has 16 points and 1 comment.
Hacker News community participants rated Hy4 as "one of the leading open-source models."
Hy4 is the first model in the Hy series to support vision capabilities.
23 more timeline events
All Facts (20)
Hy4's activated parameters account for approximately 6.4% of its total parameter count.
60%UnverifiedHy4 supports a context window of up to 1 million (1M) tokens.
60%UnverifiedHy4 still lags behind closed-source flagship models such as GPT 6.1 and Claude Opus 5.5.
50%UnverifiedThe Hy3 series has fewer than 300B parameters, and Hy4 was upgraded from Hy3 to 770B.
50%UnverifiedHy4 received specialized training for software such as Blender and CAD.
50%UnverifiedOfficials say Hy4 surpasses models such as DeepSeek, V4.1, and Flash in tests including code editing and automation.
50%UnverifiedThe current observations about Kimi K3.1 and Tencent Hy4 stripping security capabilities mainly come from a single community source (Reddit) and have not yet been officially confirmed.
50%UnverifiedKimi K3.1 and Tencent's Hy4 are two newly released open-source models, both of which have had capabilities related to cybersecurity, reverse engineering, and vulnerability patching stripped from the models.
50%UnverifiedThe Hacker News entry about Hy4 has 16 points and 1 comment.
50%UnverifiedHacker News community participants rated Hy4 as "one of the leading open-source models."
50%UnverifiedA 1-million-token context window allows an entire codebase or multiple long documents to be placed in context at once, reducing reliance on chunked retrieval pipelines.
50%UnverifiedHy4 is the first model in the Hy series to support vision capabilities.
50%UnverifiedHy4's context window reaches 1 million tokens.
50%UnverifiedHy4 has full capabilities in reasoning, tool calling and structured output.
50%UnverifiedHy4 supports computer use, and also supports command-line and graphical interface modes.
50%UnverifiedCompared with Hy4 Preview, Hy4 has improved in three areas: instruction following, long-context performance, and stability in long-running tasks and deep research scenarios.
50%UnverifiedTo upgrade from Hy4 Preview to Hy4, you only need to switch the model name to tencent/hy4.
50%UnverifiedHy4 offers a 50% discount on AI Gateway, with a deadline of December 31, 2026.
50%UnverifiedHy4 adopts a DeepSeek-style sparse attention mechanism.
50%UnverifiedHy4 is designed to handle three types of scenarios: programming development, game development, and complex document analysis.
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