# Step 5 Preview vs UI-Mate-27B

> Side-by-side benchmark comparison for Step 5 Preview and UI-Mate-27B across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/step-5-preview-vs-ui-mate-27b
- Last updated: September 21, 2026

- Shared sourced benchmarks: 0
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

No benchmark verdict yet: there is no shared sourced benchmark row for Step 5 Preview and UI-Mate-27B.

## Summary

- Step 5 Preview and UI-Mate-27B do not currently share a sourced benchmark row. The mirror therefore compares metadata, pricing, context windows, and each model's separately reported coverage without naming a benchmark winner.

## Model Snapshot

| Property | Step 5 Preview | UI-Mate-27B |
|----------|----------|----------|
| Creator | StepFun | Tencent |
| Type | Pending | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 262K |
| Independent public score (not head-to-head) | null | null |
| Benchmarks Covered | 22 | 1 |
| Pricing (input/output) | $1.00 / $2.70 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Step 5 Preview public-lane score: Coming soon
- UI-Mate-27B public-lane score: Coming soon

| Benchmark | Step 5 Preview | UI-Mate-27B | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 85.0% | Coming soon | Coming soon |
| Terminal-Bench 4.0 | 33.30% | Coming soon | Coming soon |
| CyberGym | 84.7% | Coming soon | Coming soon |
| AutomationBench | 44.0% | Coming soon | Coming soon |
| Toolathlon-Verified | 74.1% | Coming soon | Coming soon |
| MCP Atlas | 85.6% | Coming soon | Coming soon |
| JobBench | 59.0% | Coming soon | Coming soon |
| APEX-Agents | 37.8% | Coming soon | Coming soon |
| DRACO | 83.3% | Coming soon | Coming soon |
| BrowseComp | 88.7% | Coming soon | Coming soon |
| Agents' Last Exam | 29.5% | Coming soon | Coming soon |
| OSWorld-Verified | Coming soon | 77% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Step 5 Preview public-lane score: Coming soon
- UI-Mate-27B public-lane score: Coming soon

| Benchmark | Step 5 Preview | UI-Mate-27B | Winner |
|-----------|-----------|-----------|--------|
| DeepSWE | 67.7% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 85.0% | Coming soon | Coming soon |
| SciCode | 58.9% | Coming soon | Coming soon |
| ProgramBench | 80.5% | Coming soon | Coming soon |
| sweMarathon | 72.7% | Coming soon | Coming soon |
| MLS-Bench Lite | 40.5% | Coming soon | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Step 5 Preview public-lane score: 78.5 (Unranked · 2 rankable rows)
- UI-Mate-27B public-lane score: Coming soon

| Benchmark | Step 5 Preview | UI-Mate-27B | Winner |
|-----------|-----------|-----------|--------|
| CritPt | 20.9% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Step 5 Preview public-lane score: 61.2 (#28/49)
- UI-Mate-27B public-lane score: Coming soon

| Benchmark | Step 5 Preview | UI-Mate-27B | Winner |
|-----------|-----------|-----------|--------|
| OfficeQA Pro | 60.3% | Coming soon | Coming soon |
| MMMU-Pro | 76% | Coming soon | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Step 5 Preview public-lane score: Coming soon
- UI-Mate-27B public-lane score: Coming soon

| Benchmark | Step 5 Preview | UI-Mate-27B | Winner |
|-----------|-----------|-----------|--------|
| GPQA-D | 93.5% | Coming soon | Coming soon |
| HLE | 46.5% | Coming soon | Coming soon |

## FAQ

### Can I compare Step 5 Preview and UI-Mate-27B on BenchLM yet?

Not fully yet. BenchLM is tracking both models, but sourced benchmark coverage is still incomplete for a fair score-level comparison.

### Why does this page show "coming soon" values?

BenchLM only calls winners when public benchmark coverage is available on both sides of the comparison.

## Related Comparisons

- [Step 5 Preview vs UI-Mate-9B](/compare/step-5-preview-vs-ui-mate-9b)
- [UI-Mate-27B vs UI-Mate-9B](/compare/ui-mate-27b-vs-ui-mate-9b)
- [Step 5 Preview vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-step-5-preview)
- [UI-Mate-27B vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-ui-mate-27b)

## Explore More

- [Step 5 Preview profile](/models/step-5-preview)
- [UI-Mate-27B profile](/models/ui-mate-27b)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)