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Atria Dawn Preview vs Claude Haiku 5.5

Atria Dawn Preview and Claude Haiku 5.5 are closely matched at 50.8 and 50.3 on the LLM Stats Score.

Shanghai AI Laboratory · Anthropic · Updated for 2026

Which is better?

Atria Dawn Preview and Claude Haiku 5.5 are closely matched on the overall LLM Stats Score at 50.8 and 50.3.

In the 1 individual benchmarks reported for both models, Claude Haiku 5.5 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

  • you need open weights you can self-host or fine-tune

Choose Claude Haiku 5.5

  • you value its reported benchmark strengths — it wins 1 of 1 exact shared results
  • you want the most recent training data — it shipped Oct 2026

At a glance

The differences that matter most.

Atria Dawn Preview
Shanghai AI Laboratory
Claude Haiku 5.5
Anthropic
Core performance indexes
LLM Stats Score
50.8
#16
50.3
#18
Reasoning
49.5
#16
47.4
#26
Coding
34.3
#37
40.7
#12
Agents
36.9
#15
33.7
#27
Cost, coverage & limits
Benchmark wins
0 of 1
1 of 1
Input price
— / M
$0.10 / M
Output price
— / M
$0.50 / M
Context window
—
1,000,000

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Atria Dawn Preview
Claude Haiku 5.5
Tool use
28.1#20
20.8#57
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

12 reported for Atria Dawn Preview · 36 for Claude Haiku 5.5

1 shared

Atria Dawn Preview outperforms in 0 benchmarks, while Claude Haiku 5.5 is better at 1 benchmark (SWE-Bench Pro).

Claude Haiku 5.5 significantly outperforms across most benchmarks.

Wed Oct 07 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

Only Claude Haiku 5.5 specifies input context (1,000,000 tokens). Only Claude Haiku 5.5 specifies output context (128,000 tokens).

Shanghai AI Laboratory
Atria Dawn Preview
Input- tokens
Output- tokens
Anthropic
Claude Haiku 5.5
Input1,000,000 tokens
Output128,000 tokens
Wed Oct 07 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Claude Haiku 5.5 supports multimodal inputs, whereas Atria Dawn Preview does not.

Claude Haiku 5.5 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Atria Dawn Preview

Text
Images
Audio
Video

Claude Haiku 5.5

Text
Images
Audio
Video

License

Usage and distribution terms

Atria Dawn Preview is licensed under MIT, while Claude Haiku 5.5 uses a proprietary license.

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

Atria Dawn Preview

MIT

Open weights

Claude Haiku 5.5

Proprietary

Closed source

Release Timeline

When each model was launched

Atria Dawn Preview was released on 2026-09-11, while Claude Haiku 5.5 was released on 2026-10-07.

Claude Haiku 5.5 is 1 month newer than Atria Dawn Preview.

Atria Dawn Preview

Sep 11, 2026

3 weeks ago

Claude Haiku 5.5

Oct 7, 2026

0 days ago

3w newer

Knowledge Cutoff

When training data ends

Claude Haiku 5.5 has a documented knowledge cutoff of 2026-06-01, while Atria Dawn Preview's cutoff date is not specified.

We can confirm Claude Haiku 5.5's training data extends to 2026-06-01, but cannot make a direct comparison without Atria Dawn Preview's cutoff date.

Atria Dawn Preview

—

Claude Haiku 5.5

Jun 2026

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Atria Dawn Preview and Claude Haiku 5.5 side-by-side, then vote on the output you prefer.

Atria Dawn Preview
✓ Preferred
Claude Haiku 5.5
Open in Playground

FAQ

Common questions about Atria Dawn Preview vs Claude Haiku 5.5.

Which is better, Atria Dawn Preview or Claude Haiku 5.5?

Atria Dawn Preview and Claude Haiku 5.5 are closely matched on the LLM Stats Score at 50.8 and 50.3. Atria Dawn Preview is made by Shanghai AI Laboratory and Claude Haiku 5.5 is made by Anthropic. 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 Claude Haiku 5.5 in benchmarks?

Atria Dawn Preview scores DeepSearchQA: 96.0%, BrowseComp: 92.5%, CyberGym: 86.5%, MLE-Bench Lite: 86.2%, WideSearch: 81.9%. Claude Haiku 5.5 scores Global-MMLU: 87.8%, MILU: 87.6%, BenchCAD (with Python tool): 87.0%, Chartography: 86.2%, SWE-bench Multilingual: 83.7%.

What are the context window sizes for Atria Dawn Preview and Claude Haiku 5.5?

Atria Dawn Preview supports an unknown number of tokens and Claude Haiku 5.5 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 Atria Dawn Preview and Claude Haiku 5.5?

Key differences include LLM Stats Score (50.8 vs 50.3), multimodal support (no vs yes), licensing (MIT vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes Atria Dawn Preview and Claude Haiku 5.5?

Atria Dawn Preview is developed by Shanghai AI Laboratory and Claude Haiku 5.5 is developed by Anthropic.

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