The AI arena is free today

Open Superagent

DeepSeek-V2.5 vs Hy4 preview

Hy4 preview leads the LLM Stats Score 51.5 to 8.4.

DeepSeek · Tencent · Updated for 2026

Which is better?

Hy4 preview leads the overall LLM Stats Score 51.5 to 8.4, ranking #10 overall.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose DeepSeek-V2.5

  • you want predictable pricing at $0.14/M input and $0.28/M output

Choose Hy4 preview

  • overall performance matters — it scores 51.5 and ranks #10 on LLM Stats
  • your work emphasizes reasoning and coding — it leads those capability indexes
  • you want the most recent training data — it shipped Aug 2026

At a glance

The differences that matter most.

DeepSeek-V2.5
DeepSeek
Hy4 preview
Tencent
Core performance indexes
LLM Stats Score
8.4
#265
51.5
#10
Reasoning
8.5
#259
51.2
#8
Coding
6.5
#178
40.9
#10
Cost, coverage & limits
Benchmark wins
—
—
Input price
$0.14 / M
— / M
Output price
$0.28 / M
— / M
Context window
8,192
—

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
DeepSeek-V2.5
Hy4 preview
Math
14.4#210
40.3#12
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

15 reported for DeepSeek-V2.5 · 32 for Hy4 preview

No common benchmarks found

DeepSeek-V2.5 and Hy4 previewdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

Model Size

Parameter count comparison

534.0B diff

Hy4 preview has 534.0B more parameters than DeepSeek-V2.5, making it 226.3% larger.

DeepSeek
DeepSeek-V2.5
236.0Bparameters
Tencent
Hy4 preview
770.0Bparameters
236.0B
DeepSeek-V2.5
770.0B
Hy4 preview

Context Window

Maximum input and output token capacity

Only DeepSeek-V2.5 specifies input context (8,192 tokens). Only DeepSeek-V2.5 specifies output context (8,192 tokens).

DeepSeek
DeepSeek-V2.5
Input8,192 tokens
Output8,192 tokens
Tencent
Hy4 preview
Input- tokens
Output- tokens
Mon Aug 31 2026 • llm-stats.com

License

Usage and distribution terms

DeepSeek-V2.5 is licensed under deepseek, while Hy4 preview uses Apache 2.0.

License differences may affect how you can use these models in commercial or open-source projects.

DeepSeek-V2.5

deepseek

Open weights

Hy4 preview

Apache 2.0

Open weights

Release Timeline

When each model was launched

DeepSeek-V2.5 was released on 2024-05-08, while Hy4 preview was released on 2026-08-28.

Hy4 preview is 28 months newer than DeepSeek-V2.5.

DeepSeek-V2.5

May 8, 2024

2.3 years ago

Hy4 preview

Aug 28, 2026

2 days ago

2.3yr newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against DeepSeek-V2.5 and Hy4 preview side-by-side, then vote on the output you prefer.

DeepSeek-V2.5
✓ Preferred
Hy4 preview
Open in Playground

FAQ

Common questions about DeepSeek-V2.5 vs Hy4 preview.

Which is better, DeepSeek-V2.5 or Hy4 preview?

Hy4 preview leads the LLM Stats Score 51.5 to 8.4. DeepSeek-V2.5 is made by DeepSeek and Hy4 preview is made by Tencent. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does DeepSeek-V2.5 compare to Hy4 preview in benchmarks?

DeepSeek-V2.5 scores GSM8k: 95.1%, MT-Bench: 90.2%, HumanEval: 89.0%, BBH: 84.3%, AlignBench: 80.4%. Hy4 preview scores GPQA: 92.3%, Terminal-Bench 2.1: 85.4%, WideSearch: 83.9%, MCP Atlas: 83.7%, SWE-bench Multilingual: 82.9%.

What are the context window sizes for DeepSeek-V2.5 and Hy4 preview?

DeepSeek-V2.5 supports 8K tokens and Hy4 preview supports an unknown number of tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between DeepSeek-V2.5 and Hy4 preview?

Key differences include LLM Stats Score (8.4 vs 51.5), licensing (deepseek vs Apache 2.0). See the full comparison above for benchmark-by-benchmark results.

Who makes DeepSeek-V2.5 and Hy4 preview?

DeepSeek-V2.5 is developed by DeepSeek and Hy4 preview is developed by Tencent.

Related comparisons