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Atria Dawn Preview vs LongCat-Flash-Chat

Atria Dawn Preview leads the LLM Stats Score 52.3 to 19.8.

Shanghai AI Laboratory · Meituan · Updated for 2026

Which is better?

Atria Dawn Preview leads the overall LLM Stats Score 52.3 to 19.8, ranking #10 overall.

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

Choose Atria Dawn Preview

  • overall performance matters — it scores 52.3 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 Sep 2026

Choose LongCat-Flash-Chat

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

At a glance

The differences that matter most.

Atria Dawn Preview
Shanghai AI Laboratory
LongCat-Flash-Chat
Meituan
Core performance indexes
LLM Stats Score
52.3
#10
19.8
#198
Reasoning
50.5
#12
19.8
#194
Coding
36.2
#22
12.4
#145
Agents
38.8
#10
9.1
#127
Cost, coverage & limits
Benchmark wins
—
—
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

1 shared
Index
Atria Dawn Preview
LongCat-Flash-Chat
Tool use
31.1#12
8.7#136
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

12 reported for Atria Dawn Preview · 16 for LongCat-Flash-Chat

No common benchmarks found

Atria Dawn Preview and LongCat-Flash-Chatdon'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

184.0B diff

Atria Dawn Preview has 184.0B more parameters than LongCat-Flash-Chat, making it 32.9% larger.

Shanghai AI Laboratory
Atria Dawn Preview
744.0Bparameters
Meituan
LongCat-Flash-Chat
560.0Bparameters
744.0B
Atria Dawn Preview
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).

Shanghai AI Laboratory
Atria Dawn Preview
Input- tokens
Output- tokens
Meituan
LongCat-Flash-Chat
Input128,000 tokens
Output128,000 tokens
Sun Sep 20 2026 • llm-stats.com

License

Usage and distribution terms

Both models are licensed under MIT.

Both models share the same licensing terms, providing consistent usage rights.

Atria Dawn Preview

MIT

Open weights

LongCat-Flash-Chat

MIT

Open weights

Release Timeline

When each model was launched

Atria Dawn Preview was released on 2026-09-11, while LongCat-Flash-Chat was released on 2025-08-29.

Atria Dawn Preview is 13 months newer than LongCat-Flash-Chat.

Atria Dawn Preview

Sep 11, 2026

1 weeks ago

1.0yr newer
LongCat-Flash-Chat

Aug 29, 2025

1.1 years 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 Atria Dawn Preview and LongCat-Flash-Chat side-by-side, then vote on the output you prefer.

Atria Dawn Preview
✓ Preferred
LongCat-Flash-Chat
Open in Playground

FAQ

Common questions about Atria Dawn Preview vs LongCat-Flash-Chat.

Which is better, Atria Dawn Preview or LongCat-Flash-Chat?

Atria Dawn Preview leads the LLM Stats Score 52.3 to 19.8. Atria Dawn Preview is made by Shanghai AI Laboratory and LongCat-Flash-Chat is made by Meituan. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Atria Dawn Preview compare to LongCat-Flash-Chat in benchmarks?

Atria Dawn Preview scores DeepSearchQA: 96.0%, BrowseComp: 92.5%, CyberGym: 86.5%, MLE-Bench Lite: 86.2%, WideSearch: 81.9%. 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 Atria Dawn Preview and LongCat-Flash-Chat?

Atria Dawn Preview 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 Atria Dawn Preview and LongCat-Flash-Chat?

Key differences include LLM Stats Score (52.3 vs 19.8). See the full comparison above for benchmark-by-benchmark results.

Who makes Atria Dawn Preview and LongCat-Flash-Chat?

Atria Dawn Preview is developed by Shanghai AI Laboratory and LongCat-Flash-Chat is developed by Meituan.

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