# Step 3.7 Flash vs Ultramarine 1 Flash

> Side-by-side benchmark comparison for Step 3.7 Flash and Ultramarine 1 Flash across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/step-3-7-flash-vs-ultramarine-1-flash
- Last updated: October 15, 2026

- Shared sourced benchmarks: 2
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Evidence is too thin for a benchmark verdict: Step 3.7 Flash and Ultramarine 1 Flash share only 2 sourced benchmark rows.

## Summary

- Only 2 shared sourced benchmark rows are available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- Ultramarine 1 Flash has the lower published output-token price.
- Step 3.7 Flash has the larger published context window at 256K.

## Model Snapshot

| Property | Step 3.7 Flash | Ultramarine 1 Flash |
|----------|----------|----------|
| Creator | StepFun | Paper Instruments |
| Type | Open Weight | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 256K | Not disclosed |
| Independent public score (not head-to-head) | 43.7 | null |
| Benchmarks Covered | 11 | 5 |
| Pricing (input/output) | $0.20 / $1.15 | $0.15 / $0.50 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Step 3.7 Flash public-lane score: 37.1 (Estimated · #74/126)
- Ultramarine 1 Flash public-lane score: Coming soon

| Benchmark | Step 3.7 Flash | Ultramarine 1 Flash | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 59.5% | 83.2% | Ultramarine 1 Flash |
| BrowseComp | 75.8% | Coming soon | Coming soon |
| DeepSearchQA | 92.8% | Coming soon | Coming soon |
| Toolathlon | 49.5% | Coming soon | Coming soon |
| Claw-Eval | 67.1% | Coming soon | Coming soon |
| HLE w/ tools | 47.2% | Coming soon | Coming soon |
| Gert Labs | 51.57% | Coming soon | Coming soon |
| JobBench | Coming soon | 62.9% | Coming soon |
| AutomationBench | Coming soon | 50.2% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Step 3.7 Flash public-lane score: 30.2 (Estimated · #95/149)
- Ultramarine 1 Flash public-lane score: Coming soon

| Benchmark | Step 3.7 Flash | Ultramarine 1 Flash | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Pro | 56.3% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 59.5% | 83.2% | Ultramarine 1 Flash |
| DeepSWE | Coming soon | 61.5% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Step 3.7 Flash public-lane score: 76.5 (Unranked · 2 rankable rows)
- Ultramarine 1 Flash public-lane score: Coming soon

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Step 3.7 Flash public-lane score: 75.4 (Unranked · 3 rankable rows)
- Ultramarine 1 Flash public-lane score: Coming soon

| Benchmark | Step 3.7 Flash | Ultramarine 1 Flash | Winner |
|-----------|-----------|-----------|--------|
| SimpleVQA | 79.2% | Coming soon | Coming soon |
| V* | 95.3% | Coming soon | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Step 3.7 Flash public-lane score: 45 (Estimated · #96/182)
- Ultramarine 1 Flash public-lane score: Coming soon

### Instruction Following

- Winner: Insufficient shared evidence
- Step 3.7 Flash public-lane score: 82.1 (#54/146)
- Ultramarine 1 Flash public-lane score: Coming soon

## FAQ

### Is there enough evidence to pick between Step 3.7 Flash and Ultramarine 1 Flash?

Not yet. The models share only 2 sourced benchmark rows, so this mirror reports the available measurements and metadata without naming a broad winner.

### What can I compare safely on this page?

Published pricing, context windows, model type, and individual shared benchmark rows are directly comparable. Independent overall scores and non-overlapping benchmark coverage are labeled separately and should not be read as a controlled head-to-head result.

## Related Comparisons

- [Step 3.7 Flash vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-step-3-7-flash)
- [Ultramarine 1 Flash vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-ultramarine-1-flash)
- [Step 3.7 Flash vs GPT-6.1 Sol](/compare/gpt-6-1-sol-vs-step-3-7-flash)
- [Ultramarine 1 Flash vs GPT-6.1 Sol](/compare/gpt-6-1-sol-vs-ultramarine-1-flash)

## Explore More

- [Step 3.7 Flash profile](/models/step-3-7-flash)
- [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)