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Hy4 preview vs LongCat-Flash-Thinking-2601

Hy4 preview leads the LLM Stats Score 51.1 to 35.7.

Tencent · Meituan · Updated for 2026

Which is better?

Hy4 preview leads the overall LLM Stats Score 51.1 to 35.7, ranking #14 overall.

In the 1 individual benchmarks reported for both models, Hy4 preview wins 1; 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 51.1 and ranks #14 on LLM Stats
  • your work emphasizes reasoning and coding — it leads those capability indexes
  • you value its reported benchmark strengths — it wins 1 of 1 exact shared results
  • you want the most recent training data — it shipped Aug 2026

Choose LongCat-Flash-Thinking-2601

  • you want predictable pricing at $0.30/M input and $1.20/M output

At a glance

The differences that matter most.

Hy4 preview
Tencent
LongCat-Flash-Thinking-2601
Meituan
Core performance indexes
LLM Stats Score
51.1
#14
35.7
#78
Reasoning
50.7
#11
35.9
#73
Coding
39.8
#12
19.2
#101
Agents
36.3
#14
9.9
#112
Cost, coverage & limits
Benchmark wins
1 of 1
0 of 1
Input price
— / M
$0.30 / M
Output price
— / M
$1.20 / M
Context window
—
128,000

Capability indexes

Additional strengths measured across groups of related public benchmarks

2 shared
Index
Hy4 preview
LongCat-Flash-Thinking-2601
Math
39.4#17
30.8#70
Tool use
31.1#10
26.2#29
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

32 reported for Hy4 preview · 11 for LongCat-Flash-Thinking-2601

1 shared

Hy4 preview outperforms in 1 benchmarks (GPQA), while LongCat-Flash-Thinking-2601 is better at 0 benchmarks.

Hy4 preview significantly outperforms across most benchmarks.

Fri Sep 04 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Model Size

Parameter count comparison

210.0B diff

Hy4 preview has 210.0B more parameters than LongCat-Flash-Thinking-2601, making it 37.5% larger.

Tencent
Hy4 preview
770.0Bparameters
Meituan
LongCat-Flash-Thinking-2601
560.0Bparameters
770.0B
Hy4 preview
560.0B
LongCat-Flash-Thinking-2601

Context Window

Maximum input and output token capacity

Only LongCat-Flash-Thinking-2601 specifies input context (128,000 tokens). Only LongCat-Flash-Thinking-2601 specifies output context (128,000 tokens).

Tencent
Hy4 preview
Input- tokens
Output- tokens
Meituan
LongCat-Flash-Thinking-2601
Input128,000 tokens
Output128,000 tokens
Fri Sep 04 2026 • llm-stats.com

License

Usage and distribution terms

Hy4 preview is licensed under Apache 2.0, while LongCat-Flash-Thinking-2601 uses MIT.

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

Hy4 preview

Apache 2.0

Open weights

LongCat-Flash-Thinking-2601

MIT

Open weights

Release Timeline

When each model was launched

Hy4 preview was released on 2026-08-28, while LongCat-Flash-Thinking-2601 was released on 2026-01-14.

Hy4 preview is 8 months newer than LongCat-Flash-Thinking-2601.

Hy4 preview

Aug 28, 2026

1 weeks ago

7mo newer
LongCat-Flash-Thinking-2601

Jan 14, 2026

7 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 LongCat-Flash-Thinking-2601 side-by-side, then vote on the output you prefer.

Hy4 preview
✓ Preferred
LongCat-Flash-Thinking-2601
Open in Playground

FAQ

Common questions about Hy4 preview vs LongCat-Flash-Thinking-2601.

Which is better, Hy4 preview or LongCat-Flash-Thinking-2601?

Hy4 preview leads the LLM Stats Score 51.1 to 35.7. Hy4 preview is made by Tencent and LongCat-Flash-Thinking-2601 is made by Meituan. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Hy4 preview compare to LongCat-Flash-Thinking-2601 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%. LongCat-Flash-Thinking-2601 scores AIME 2025: 99.6%, Tau2 Telecom: 99.3%, Tau2 Retail: 88.6%, LiveCodeBench: 82.8%, GPQA: 80.5%.

What are the context window sizes for Hy4 preview and LongCat-Flash-Thinking-2601?

Hy4 preview supports an unknown number of tokens and LongCat-Flash-Thinking-2601 supports 128K 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 LongCat-Flash-Thinking-2601?

Key differences include LLM Stats Score (51.1 vs 35.7), licensing (Apache 2.0 vs MIT). See the full comparison above for benchmark-by-benchmark results.

Who makes Hy4 preview and LongCat-Flash-Thinking-2601?

Hy4 preview is developed by Tencent and LongCat-Flash-Thinking-2601 is developed by Meituan.

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