# GPT-6.1 Sol vs Ultramarine 1 Flash

> Side-by-side benchmark comparison for GPT-6.1 Sol and Ultramarine 1 Flash across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-6-1-sol-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: GPT-6.1 Sol 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.
- GPT-6.1 Sol has the larger published context window at 1.05M.

## Model Snapshot

| Property | GPT-6.1 Sol | Ultramarine 1 Flash |
|----------|----------|----------|
| Creator | OpenAI | Paper Instruments |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1.05M | Not disclosed |
| Independent public score (not head-to-head) | 83.93 | null |
| Benchmarks Covered | 15 | 5 |
| Pricing (input/output) | $2.00 / $10.00 | $0.15 / $0.50 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- GPT-6.1 Sol public-lane score: 76.2 (Estimated · #5/126)
- Ultramarine 1 Flash public-lane score: Coming soon

| Benchmark | GPT-6.1 Sol | Ultramarine 1 Flash | Winner |
|-----------|-----------|-----------|--------|
| AutomationBench | 36.1% | 50.2% | Ultramarine 1 Flash |
| Terminal-Bench-Science 0.1 | 57.0% | Coming soon | Coming soon |
| ExploitGym | 35.1% | Coming soon | Coming soon |
| JobBench | Coming soon | 62.9% | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 83.2% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- GPT-6.1 Sol public-lane score: 70.9 (Supported · #8/149)
- Ultramarine 1 Flash public-lane score: Coming soon

| Benchmark | GPT-6.1 Sol | Ultramarine 1 Flash | Winner |
|-----------|-----------|-----------|--------|
| DeepSWE | 71.9% | 61.5% | GPT-6.1 Sol |
| Bug Hunt Bench | 44.3 fixes | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 83.2% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- GPT-6.1 Sol public-lane score: 90.5 (#2/29)
- Ultramarine 1 Flash public-lane score: Coming soon

| Benchmark | GPT-6.1 Sol | Ultramarine 1 Flash | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-1 | 96.50% | Coming soon | Coming soon |
| ARC-AGI-2 | 94.2% | Coming soon | Coming soon |
| ARC-AGI-3 | 52.7% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- GPT-6.1 Sol public-lane score: 87.3 (Unranked · 1 rankable row)
- Ultramarine 1 Flash public-lane score: Coming soon

### Knowledge

- Winner: Insufficient shared evidence
- GPT-6.1 Sol public-lane score: 85.7 (Supported · #4/182)
- Ultramarine 1 Flash public-lane score: Coming soon

| Benchmark | GPT-6.1 Sol | Ultramarine 1 Flash | Winner |
|-----------|-----------|-----------|--------|
| HealthBench (raw) | 56.7% | Coming soon | Coming soon |
| HealthBench (length-adjusted) | 58.5% | Coming soon | Coming soon |
| HealthBench Professional | 64.2% | Coming soon | Coming soon |
| HealthBench Professional (raw) | 67.2% | Coming soon | Coming soon |
| HealthBench Hard | 36.2% | Coming soon | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- GPT-6.1 Sol public-lane score: 97.3 (Unranked · 2 rankable rows)
- Ultramarine 1 Flash public-lane score: Coming soon

| Benchmark | GPT-6.1 Sol | Ultramarine 1 Flash | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 93.684% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 100.000% | Coming soon | Coming soon |

## FAQ

### Is there enough evidence to pick between GPT-6.1 Sol 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

- [GPT-6.1 Sol vs GPT-6 Astra](/compare/gpt-6-1-sol-vs-gpt-6-astra)
- [Ultramarine 1 Flash vs GPT-6 Astra](/compare/gpt-6-astra-vs-ultramarine-1-flash)
- [GPT-6.1 Sol vs GPT-6 Sol](/compare/gpt-6-1-sol-vs-gpt-6-sol)
- [Ultramarine 1 Flash vs GPT-6 Sol](/compare/gpt-6-sol-vs-ultramarine-1-flash)

## Explore More

- [GPT-6.1 Sol profile](/models/gpt-6-1-sol)
- [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)