# Atria Dawn Preview vs Ultramarine 1 Flash

> Side-by-side benchmark comparison for Atria Dawn Preview and Ultramarine 1 Flash across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/atria-dawn-preview-vs-ultramarine-1-flash
- Last updated: October 15, 2026

- Shared sourced benchmarks: 4
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Pick Atria Dawn Preview if you want the stronger benchmark profile. Ultramarine 1 Flash only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Atria Dawn Preview leads overall 67 to 0.
- The biggest single benchmark swing is JobBench in Agentic, with scores of 50.3% and 62.9%.
- Atria Dawn Preview is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Atria Dawn Preview also has the larger context window at 256K.

## Model Snapshot

| Property | Atria Dawn Preview | Ultramarine 1 Flash |
|----------|----------|----------|
| Creator | Shanghai Artificial Intelligence Laboratory | Paper Instruments |
| Type | Open Weight | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 256K | Not disclosed |
| Overall Score | null | null |
| Benchmarks Covered | 13 | 5 |
| Pricing (input/output) | $0.00 / $0.00 | $0.15 / $0.50 |

## Category Breakdown

### Agentic

- Winner: Not comparable
- Atria Dawn Preview public-lane score: Coming soon
- Ultramarine 1 Flash public-lane score: Coming soon

| Benchmark | Atria Dawn Preview | Ultramarine 1 Flash | Winner |
|-----------|-----------|-----------|--------|
| AutomationBench | 53.8% | 50.2% | Atria Dawn Preview |
| BFCL v4 | 77.0% | Coming soon | Coming soon |
| CyberGym | 86.5% | Coming soon | Coming soon |
| DeepSearchQA | 96.0% | Coming soon | Coming soon |
| BrowseComp | 92.5% | Coming soon | Coming soon |
| skillsBench | 66.4% | Coming soon | Coming soon |
| MLE-Bench Lite | 86.2% | Coming soon | Coming soon |
| WideResearch | 81.9% | Coming soon | Coming soon |
| τ³-bench results | 41.2% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 78.3% | 83.2% | Ultramarine 1 Flash |
| JobBench | 50.3% | 62.9% | Ultramarine 1 Flash |

### Coding

- Winner: Not comparable
- Atria Dawn Preview public-lane score: Coming soon
- Ultramarine 1 Flash public-lane score: Coming soon

| Benchmark | Atria Dawn Preview | Ultramarine 1 Flash | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 78.3% | 83.2% | Ultramarine 1 Flash |
| SWE-bench Pro | 59.6% | Coming soon | Coming soon |
| DeepSWE | Coming soon | 61.5% | Coming soon |

## FAQ

### Which is better overall, Atria Dawn Preview or Ultramarine 1 Flash?

Atria Dawn Preview is ahead overall on BenchLM right now.

### How many benchmarks does Atria Dawn Preview cover on BenchLM?

Atria Dawn Preview currently has 13 sourced benchmark scores on BenchLM.

### How many benchmarks does Ultramarine 1 Flash cover on BenchLM?

Ultramarine 1 Flash currently has 5 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Atria Dawn Preview vs Claude Opus 5.5](/compare/atria-dawn-preview-vs-claude-opus-5-5)
- [Ultramarine 1 Flash vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-ultramarine-1-flash)
- [Atria Dawn Preview vs GPT-6.1 Sol](/compare/atria-dawn-preview-vs-gpt-6-1-sol)
- [Ultramarine 1 Flash vs GPT-6.1 Sol](/compare/gpt-6-1-sol-vs-ultramarine-1-flash)

## Explore More

- [Atria Dawn Preview profile](/models/atria-dawn-preview)
- [Ultramarine 1 Flash profile](/models/ultramarine-1-flash)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)