Is Hy3 available on FastMetal?

Not at the moment. GLM 5.3 Flash, from the same lab, is available on the FastMetal API today.

What is the context window of Hy3?

262,144 tokens, shared between the prompt and the response.

#60 on the public arena's Overall board (ELO 1,455). Ranks move as the leaderboard is updated.

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tencent/hy3

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Hy3

Hy3 is a 295B-parameter Mixture-of-Experts model from Tencent (21B active, 192 experts with top-8 routing) built for reasoning, agentic workflows, and real-world production use. It supports a configurable reasoning effort:...

7/6/2026

262,144 tokens

#31 Text (Chinese)

Specifications

Modalities

Input

text

Output

text

Supported Parameters

frequency_penalty

include_reasoning

logit_bias

max_completion_tokens

max_tokens

min_p

presence_penalty

reasoning

reasoning_effort

repetition_penalty

response_format

seed

stop

structured_outputs

temperature

tool_choice

tools

top_k

top_p

Max Output Tokens

262,144

Reasoning Configuration

Default: Thinking on (effort: high)
Selectable effort levels: high
low
none
Turning thinking off: Possible (reasoning.enabled: false)

How to control thinking, and what it costs

Frequently asked questions

Is Hy3 available on FastMetal?: Not at the moment. GLM 5.3 Flash, from the same lab, is available on the FastMetal API today.
What is the context window of Hy3?: 262,144 tokens, shared between the prompt and the response.
How does Hy3 rank?: #60 on the public arena's Overall board (ELO 1,455). Ranks move as the leaderboard is updated.