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Atria Dawn Preview vs Jamba 1.5 Large

Atria Dawn Preview leads the LLM Stats Score 52.3 to 0.9.

Shanghai AI Laboratory · AI21 Labs · Updated for 2026

Which is better?

Atria Dawn Preview leads the overall LLM Stats Score 52.3 to 0.9, 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 — it leads those capability indexes
  • you want the most recent training data — it shipped Sep 2026

Choose Jamba 1.5 Large

  • you want predictable pricing at $2.00/M input and $8.00/M output

At a glance

The differences that matter most.

Atria Dawn Preview
Shanghai AI Laboratory
Jamba 1.5 Large
AI21 Labs
Core performance indexes
LLM Stats Score
52.3
#10
0.9
#322
Reasoning
50.5
#12
1.0
#314
Cost, coverage & limits
Benchmark wins
—
—
Input price
— / M
$2.00 / M
Output price
— / M
$8.00 / M
Context window
—
256,000

Individual benchmarks

12 reported for Atria Dawn Preview · 8 for Jamba 1.5 Large

No common benchmarks found

Atria Dawn Preview and Jamba 1.5 Largedon'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

346.0B diff

Atria Dawn Preview has 346.0B more parameters than Jamba 1.5 Large, making it 86.9% larger.

Shanghai AI Laboratory
Atria Dawn Preview
744.0Bparameters
AI21 Labs
Jamba 1.5 Large
398.0Bparameters
744.0B
Atria Dawn Preview
398.0B
Jamba 1.5 Large

Context Window

Maximum input and output token capacity

Only Jamba 1.5 Large specifies input context (256,000 tokens). Only Jamba 1.5 Large specifies output context (256,000 tokens).

Shanghai AI Laboratory
Atria Dawn Preview
Input- tokens
Output- tokens
AI21 Labs
Jamba 1.5 Large
Input256,000 tokens
Output256,000 tokens
Wed Sep 16 2026 • llm-stats.com

License

Usage and distribution terms

Atria Dawn Preview is licensed under MIT, while Jamba 1.5 Large uses Jamba Open Model License.

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

Atria Dawn Preview

MIT

Open weights

Jamba 1.5 Large

Jamba Open Model License

Open weights

Release Timeline

When each model was launched

Atria Dawn Preview was released on 2026-09-11, while Jamba 1.5 Large was released on 2024-08-22.

Atria Dawn Preview is 25 months newer than Jamba 1.5 Large.

Atria Dawn Preview

Sep 11, 2026

5 days ago

2.1yr newer
Jamba 1.5 Large

Aug 22, 2024

2.1 years ago

Knowledge Cutoff

When training data ends

Jamba 1.5 Large has a documented knowledge cutoff of 2024-03-05, while Atria Dawn Preview's cutoff date is not specified.

We can confirm Jamba 1.5 Large's training data extends to 2024-03-05, but cannot make a direct comparison without Atria Dawn Preview's cutoff date.

Atria Dawn Preview

—

Jamba 1.5 Large

Mar 2024

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Atria Dawn Preview and Jamba 1.5 Large side-by-side, then vote on the output you prefer.

Atria Dawn Preview
✓ Preferred
Jamba 1.5 Large
Open in Playground

FAQ

Common questions about Atria Dawn Preview vs Jamba 1.5 Large.

Which is better, Atria Dawn Preview or Jamba 1.5 Large?

Atria Dawn Preview leads the LLM Stats Score 52.3 to 0.9. Atria Dawn Preview is made by Shanghai AI Laboratory and Jamba 1.5 Large is made by AI21 Labs. 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 Jamba 1.5 Large in benchmarks?

Atria Dawn Preview scores DeepSearchQA: 96.0%, BrowseComp: 92.5%, CyberGym: 86.5%, MLE-Bench Lite: 86.2%, WideSearch: 81.9%. Jamba 1.5 Large scores ARC-C: 93.0%, GSM8k: 87.0%, MMLU: 81.2%, Arena Hard: 65.4%, TruthfulQA: 58.3%.

What are the context window sizes for Atria Dawn Preview and Jamba 1.5 Large?

Atria Dawn Preview supports an unknown number of tokens and Jamba 1.5 Large supports 256K 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 Jamba 1.5 Large?

Key differences include LLM Stats Score (52.3 vs 0.9), licensing (MIT vs Jamba Open Model License). See the full comparison above for benchmark-by-benchmark results.

Who makes Atria Dawn Preview and Jamba 1.5 Large?

Atria Dawn Preview is developed by Shanghai AI Laboratory and Jamba 1.5 Large is developed by AI21 Labs.

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