Hy4 preview is a large language model from Tencent Hunyuan, released on August 28, 2026. It accepts text input.

When was Hy4 preview released?

Tencent Hunyuan released Hy4 preview on August 28, 2026.

How much does Hy4 preview cost?

Hy4 preview costs $0.834 per 1M input tokens and $2.501 per 1M output tokens through the Tencent Hunyuan API. Cached input costs $0.042 per 1M tokens. Prices are from Tencent Hunyuan's official pricing as of October 5, 2026.

What is Hy4 preview's context window?

Hy4 preview has a 1M-token context window and can generate up to 64K output tokens.

How does Hy4 preview score on benchmarks?

Hy4 preview has 18 cited benchmark scores, including Terminal-Bench 4.0 (Vals AI) 8.1%, LMArena Agent (LMArena) 0.0395 and LMArena WebDev (LMArena) 1633.2 Elo. Each score links to its source.

Hy4 preview

Tencent Hunyuan·Pending·Released 2026-08-28text

Context1,000k

Max output64k

Input / 1M$0.834 ↗

Output / 1M$2.501 ↗

Cached in$0.042

Benchmarks18

Benchmarks

Cited public sources · rank is exact-benchmark, apples-to-apples

Terminal-Bench 4.0 (Vals AI)

#31/408.1% ↗

LMArena Agent (LMArena)

#18/480.0395 ↗

LMArena WebDev (LMArena)

#14/941633.2 ↗

Agents' Last Exam (ALE-CLI)

#4/422.8% ↗

CyberGym

#2/378.4% ↗

DeepSWE

#1/364.3% ↗

GPQA Diamond

#16/8392.3% ↗

HLE (no tools, text-only)

43.4% ↗

HLE (with tools, text-only)

#1/355.4% ↗

MathArena Apex 2025

74.2% ↗

MCP-Atlas (public)

83.7% ↗

NL2Repo-Bench

#1/458.9% ↗

OfficeQA Pro

#1/466.2% ↗

SWE-bench Multilingual

#2/1582.9% ↗

SWE-bench Pro

#1/965.7% ↗

Terminal-Bench 2.1

#9/2485.4% ↗

Toolathlon-Verified

#3/474.1% ↗

WideSearch

#1/583.9% ↗

Compare

vs Gemini 4 Argon vs GPT-6.1 Sol vs Claude Sonnet 5.5 vs Muse Spark 1.3 vs GPT-6 Sol vs GPT-6 Luna vs Claude Opus 5.5 vs GPT-6 Astra

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Hy4 preview FAQ

What is Hy4 preview?: Hy4 preview is a large language model from Tencent Hunyuan, released on August 28, 2026. It accepts text input.
When was Hy4 preview released?: Tencent Hunyuan released Hy4 preview on August 28, 2026.
How much does Hy4 preview cost?: Hy4 preview costs $0.834 per 1M input tokens and $2.501 per 1M output tokens through the Tencent Hunyuan API. Cached input costs $0.042 per 1M tokens. Prices are from Tencent Hunyuan's official pricing as of October 5, 2026.
What is Hy4 preview's context window?: Hy4 preview has a 1M-token context window and can generate up to 64K output tokens.
How does Hy4 preview score on benchmarks?: Hy4 preview has 18 cited benchmark scores, including Terminal-Bench 4.0 (Vals AI) 8.1%, LMArena Agent (LMArena) 0.0395 and LMArena WebDev (LMArena) 1633.2 Elo. Each score links to its source.

Access Hy4 preview and every other model through one endpoint with automatic failover: Respan gateway.