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Atria Dawn Preview vs LongCat-Flash-Thinking-2601

Atria Dawn Preview leads the LLM Stats Score 52.3 to 35.3.

Shanghai AI Laboratory · Meituan · Updated for 2026

Which is better?

Atria Dawn Preview leads the overall LLM Stats Score 52.3 to 35.3, ranking #10 overall.

In the 1 individual benchmarks reported for both models, Atria Dawn 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 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 value its reported benchmark strengths — it wins 1 of 1 exact shared results
  • you want the most recent training data — it shipped Sep 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.

Atria Dawn Preview
Shanghai AI Laboratory
LongCat-Flash-Thinking-2601
Meituan
Core performance indexes
LLM Stats Score
52.3
#10
35.3
#86
Reasoning
50.5
#12
35.5
#81
Coding
36.2
#22
18.8
#109
Agents
38.8
#10
9.6
#121
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
Atria Dawn Preview
LongCat-Flash-Thinking-2601
Tool use
31.1#12
24.5#37
Research
36.1#1
13.1#47
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

12 reported for Atria Dawn Preview · 11 for LongCat-Flash-Thinking-2601

1 shared

Atria Dawn Preview outperforms in 1 benchmarks (BrowseComp), while LongCat-Flash-Thinking-2601 is better at 0 benchmarks.

Atria Dawn 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

184.0B diff

Atria Dawn Preview has 184.0B more parameters than LongCat-Flash-Thinking-2601, making it 32.9% larger.

Shanghai AI Laboratory
Atria Dawn Preview
744.0Bparameters
Meituan
LongCat-Flash-Thinking-2601
560.0Bparameters
744.0B
Atria Dawn 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).

Shanghai AI Laboratory
Atria Dawn Preview
Input- tokens
Output- tokens
Meituan
LongCat-Flash-Thinking-2601
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-Thinking-2601

MIT

Open weights

Release Timeline

When each model was launched

Atria Dawn Preview was released on 2026-09-11, while LongCat-Flash-Thinking-2601 was released on 2026-01-14.

Atria Dawn Preview is 8 months newer than LongCat-Flash-Thinking-2601.

Atria Dawn Preview

Sep 11, 2026

1 weeks ago

8mo newer
LongCat-Flash-Thinking-2601

Jan 14, 2026

8 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 Atria Dawn Preview and LongCat-Flash-Thinking-2601 side-by-side, then vote on the output you prefer.

Atria Dawn Preview
✓ Preferred
LongCat-Flash-Thinking-2601
Open in Playground

FAQ

Common questions about Atria Dawn Preview vs LongCat-Flash-Thinking-2601.

Which is better, Atria Dawn Preview or LongCat-Flash-Thinking-2601?

Atria Dawn Preview leads the LLM Stats Score 52.3 to 35.3. Atria Dawn Preview is made by Shanghai AI Laboratory 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 Atria Dawn Preview compare to LongCat-Flash-Thinking-2601 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-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 Atria Dawn Preview and LongCat-Flash-Thinking-2601?

Atria Dawn 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 Atria Dawn Preview and LongCat-Flash-Thinking-2601?

Key differences include LLM Stats Score (52.3 vs 35.3). See the full comparison above for benchmark-by-benchmark results.

Who makes Atria Dawn Preview and LongCat-Flash-Thinking-2601?

Atria Dawn Preview is developed by Shanghai AI Laboratory and LongCat-Flash-Thinking-2601 is developed by Meituan.

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