Model Comparison

Hy3 vs LongCat-Flash-ChatWhich is better in 2026?

Hy3 significantly outperforms across most benchmarks.

Verdict: Hy3 vs LongCat-Flash-Chat — which is better?

Hy3 (by Tencent) and LongCat-Flash-Chat (by Meituan) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

Hy3 outperforms in 2 benchmarks (GPQA, SWE-Bench Verified), while LongCat-Flash-Chat is better at 0 benchmarks. Hy3 significantly outperforms across most benchmarks.

Choose Hy3 if…

  • you want the strongest raw capability — it leads on 2 of 2 shared benchmarks
  • you want the most recent training data — it shipped Jul 2026

Choose LongCat-Flash-Chat if…

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

Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

Hy3 outperforms in 2 benchmarks (GPQA, SWE-Bench Verified), while LongCat-Flash-Chat is better at 0 benchmarks.

Hy3 significantly outperforms across most benchmarks.

Tue Jul 21 2026 • llm-stats.com

Arena Performance

Human preference votes

Model Size

Parameter count comparison

265.0B diff

LongCat-Flash-Chat has 265.0B more parameters than Hy3, making it 89.8% larger.

Tencent
Hy3
295.0Bparameters
Meituan
LongCat-Flash-Chat
560.0Bparameters
295.0B
Hy3
560.0B
LongCat-Flash-Chat

Context Window

Maximum input and output token capacity

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

Tencent
Hy3
Input- tokens
Output- tokens
Meituan
LongCat-Flash-Chat
Input128,000 tokens
Output128,000 tokens
Tue Jul 21 2026 • llm-stats.com

License

Usage and distribution terms

Hy3 is licensed under Apache 2.0, while LongCat-Flash-Chat uses MIT.

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

Hy3

Apache 2.0

Open weights

LongCat-Flash-Chat

MIT

Open weights

Release Timeline

When each model was launched

Hy3 was released on 2026-07-06, while LongCat-Flash-Chat was released on 2025-08-29.

Hy3 is 10 months newer than LongCat-Flash-Chat.

Hy3

Jul 6, 2026

2 weeks ago

10mo newer
LongCat-Flash-Chat

Aug 29, 2025

10 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→

Key Takeaways

Tencent
Higher GPQA score (90.4% vs 73.2%)
Higher SWE-Bench Verified score (78.0% vs 60.4%)
Meituan
Larger context window (128,000 tokens)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Hy3 and LongCat-Flash-Chat side-by-side, then vote on the output you prefer.

Hy3
✓ Preferred
LongCat-Flash-Chat
Open in Playground
AI Model Comparison Table
Feature
Tencent
Hy3
Meituan
LongCat-Flash-Chat

FAQ

Common questions about Hy3 vs LongCat-Flash-Chat.

Which is better, Hy3 or LongCat-Flash-Chat?

Hy3 significantly outperforms across most benchmarks. Hy3 is made by Tencent and LongCat-Flash-Chat is made by Meituan. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Hy3 compare to LongCat-Flash-Chat in benchmarks?

Hy3 scores DeepSearchQA: 91.0%, GPQA: 90.4%, IMO-AnswerBench: 90.0%, BrowseComp: 84.2%, MCP Atlas: 79.1%. LongCat-Flash-Chat scores MATH-500: 96.4%, MMLU: 89.7%, IFEval: 89.6%, ZebraLogic: 89.3%, HumanEval: 88.4%.

What are the context window sizes for Hy3 and LongCat-Flash-Chat?

Hy3 supports an unknown number of tokens and LongCat-Flash-Chat 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 Hy3 and LongCat-Flash-Chat?

Key differences include licensing (Apache 2.0 vs MIT). See the full comparison above for benchmark-by-benchmark results.

Who makes Hy3 and LongCat-Flash-Chat?

Hy3 is developed by Tencent and LongCat-Flash-Chat is developed by Meituan.