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Hy4 preview vs Laguna S 2.1

Hy4 preview leads the LLM Stats Score 51.0 to 40.9.

Tencent · Poolside · Updated for 2026

Which is better?

Hy4 preview leads the overall LLM Stats Score 51.0 to 40.9, ranking #14 overall.

In the 4 individual benchmarks reported for both models, Hy4 preview wins 4; this is a narrower head-to-head signal than the composite indexes.

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

Choose Hy4 preview

  • overall performance matters — it scores 51.0 and ranks #14 on LLM Stats
  • your work emphasizes reasoning and agents — it leads those capability indexes
  • you value its reported benchmark strengths — it wins 4 of 4 exact shared results
  • you want the most recent training data — it shipped Aug 2026

Choose Laguna S 2.1

  • you want predictable pricing at $0.10/M input and $0.20/M output

At a glance

The differences that matter most.

Hy4 preview
Tencent
Laguna S 2.1
Poolside
Core performance indexes
LLM Stats Score
51.0
#14
40.9
#53
Reasoning
50.8
#10
40.4
#53
Coding
39.7
#14
31.0
#45
Agents
36.7
#16
24.6
#50
Cost, coverage & limits
Benchmark wins
4 of 4
0 of 4
Input price
— / M
$0.10 / M
Output price
— / M
$0.20 / M
Context window
—
1,048,576

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Hy4 preview
Laguna S 2.1
Tool use
30.9#14
17.4#73
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

32 reported for Hy4 preview · 6 for Laguna S 2.1

4 shared

Hy4 preview outperforms in 4 benchmarks (SWE-bench Multilingual, SWE-Bench Pro, Terminal-Bench 2.1, Toolathlon), while Laguna S 2.1 is better at 0 benchmarks.

Hy4 preview significantly outperforms across most benchmarks.

Sun Sep 20 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Model Size

Parameter count comparison

652.0B diff

Hy4 preview has 652.0B more parameters than Laguna S 2.1, making it 552.5% larger.

Tencent
Hy4 preview
770.0Bparameters
Poolside
Laguna S 2.1
118.0Bparameters
770.0B
Hy4 preview
118.0B
Laguna S 2.1

Context Window

Maximum input and output token capacity

Only Laguna S 2.1 specifies input context (1,048,576 tokens).

Tencent
Hy4 preview
Input- tokens
Output- tokens
Poolside
Laguna S 2.1
Input1,048,576 tokens
Output- tokens
Sun Sep 20 2026 • llm-stats.com

License

Usage and distribution terms

Hy4 preview is licensed under Apache 2.0, while Laguna S 2.1 uses OpenMDW License v1.1.

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

Hy4 preview

Apache 2.0

Open weights

Laguna S 2.1

OpenMDW License v1.1

Open weights

Release Timeline

When each model was launched

Hy4 preview was released on 2026-08-28, while Laguna S 2.1 was released on 2026-07-21.

Hy4 preview is 1 month newer than Laguna S 2.1.

Hy4 preview

Aug 28, 2026

3 weeks ago

1mo newer
Laguna S 2.1

Jul 21, 2026

2 months ago

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 Hy4 preview and Laguna S 2.1 side-by-side, then vote on the output you prefer.

Hy4 preview
✓ Preferred
Laguna S 2.1
Open in Playground

FAQ

Common questions about Hy4 preview vs Laguna S 2.1.

Which is better, Hy4 preview or Laguna S 2.1?

Hy4 preview leads the LLM Stats Score 51.0 to 40.9. Hy4 preview is made by Tencent and Laguna S 2.1 is made by Poolside. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Hy4 preview compare to Laguna S 2.1 in benchmarks?

Hy4 preview scores GPQA: 92.3%, Terminal-Bench 2.1: 85.4%, WideSearch: 83.9%, MCP Atlas: 83.7%, SWE-bench Multilingual: 82.9%. Laguna S 2.1 scores SWE-bench Multilingual: 78.5%, Terminal-Bench 2.1: 70.2%, SWE-Bench Pro: 59.4%, Toolathlon: 49.7%, SWE Atlas - Codebase QnA: 46.2%.

What are the context window sizes for Hy4 preview and Laguna S 2.1?

Hy4 preview supports an unknown number of tokens and Laguna S 2.1 supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Hy4 preview and Laguna S 2.1?

Key differences include LLM Stats Score (51.0 vs 40.9), licensing (Apache 2.0 vs OpenMDW License v1.1). See the full comparison above for benchmark-by-benchmark results.

Who makes Hy4 preview and Laguna S 2.1?

Hy4 preview is developed by Tencent and Laguna S 2.1 is developed by Poolside.

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