# LongCat-2.5 vs Step 5 Preview

> Side-by-side benchmark comparison for LongCat-2.5 and Step 5 Preview across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/longcat-2-5-vs-step-5-preview
- Last updated: November 9, 2026

- Shared sourced benchmarks: 10
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Step 5 Preview leads by point estimate. Conditional score ranges do not establish rank confidence. Choose using the category evidence and your own workload tests.

## Summary

- Step 5 Preview has the higher overall point estimate 56.59 to 0. Conditional score ranges do not establish rank confidence.
- The biggest single benchmark swing is ProgramBench in Coding, with scores of 25.5% and 80.5%.
- LongCat-2.5 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.

## Model Snapshot

| Property | LongCat-2.5 | Step 5 Preview |
|----------|----------|----------|
| Creator | Meituan | StepFun |
| Type | Open Weight | Open Weight |
| Reasoning | Hybrid | Reasoning |
| Context | 1M | 1M |
| Overall Score | null | 56.59 |
| Benchmarks Covered | 22 | 24 |
| Pricing (input/output) | $0.30 / $1.20 | $1.00 / $2.70 |

## Category Breakdown

### Agentic

- Winner: Not comparable
- LongCat-2.5 public-lane score: Coming soon
- Step 5 Preview public-lane score: 54.9 (Estimated · #45/132)

| Benchmark | LongCat-2.5 | Step 5 Preview | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 88.4% | 85.0% | LongCat-2.5 |
| Terminal-Bench 4.0 | 38.50% | 33.30% | LongCat-2.5 |
| BrowseComp | 91.9% | 88.7% | LongCat-2.5 |
| AutomationBench | 51.8% | 44.0% | LongCat-2.5 |
| HLE w/ tools | 63.1% | Coming soon | Coming soon |
| Agents' Last Exam | 38.5% | 29.5% | LongCat-2.5 |
| MCP Atlas | 83.1% | 85.6% | Step 5 Preview |
| JobBench | 65.4% | 59.0% | LongCat-2.5 |
| skillsBench | 63.3% | Coming soon | Coming soon |
| SpreadsheetBench 2 | 34.9% | Coming soon | Coming soon |
| Claw-Eval | 78.3% | Coming soon | Coming soon |
| CyberGym | Coming soon | 84.7% | Coming soon |
| Toolathlon-Verified | Coming soon | 74.1% | Coming soon |
| APEX-Agents | Coming soon | 37.8% | Coming soon |
| DRACO | Coming soon | 83.3% | Coming soon |
| Hermes Index | Coming soon | 32.8% | Coming soon |
| Hermes Bench | Coming soon | 69.2% | Coming soon |

### Coding

- Winner: Not comparable
- LongCat-2.5 public-lane score: Coming soon
- Step 5 Preview public-lane score: 49.1 (Estimated · #50/158)

| Benchmark | LongCat-2.5 | Step 5 Preview | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 88.4% | 85.0% | LongCat-2.5 |
| ProgramBench | 25.5% | 80.5% | Step 5 Preview |
| DeepSWE | 64.6% | 67.7% | Step 5 Preview |
| PaperBench | 82.1% | Coming soon | Coming soon |
| SWE-Atlas Codebase QnA | 58.3% | Coming soon | Coming soon |
| NL2Repo | 60.5% | Coming soon | Coming soon |
| SciCode | Coming soon | 58.9% | Coming soon |
| sweMarathon | Coming soon | 72.7% | Coming soon |
| MLS-Bench Lite | Coming soon | 40.5% | Coming soon |

### Reasoning

- Winner: Not comparable
- LongCat-2.5 public-lane score: Coming soon
- Step 5 Preview public-lane score: 52.5 (Estimated · #48/157)

| Benchmark | LongCat-2.5 | Step 5 Preview | Winner |
|-----------|-----------|-----------|--------|
| CritPt | Coming soon | 20.9% | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- LongCat-2.5 public-lane score: Coming soon
- Step 5 Preview public-lane score: 59.5 (Estimated · #38/67)

| Benchmark | LongCat-2.5 | Step 5 Preview | Winner |
|-----------|-----------|-----------|--------|
| Vision2Web | 78.6% | Coming soon | Coming soon |
| CharXiv | 90.2% | Coming soon | Coming soon |
| MathVision w/ Python | 96.5% | Coming soon | Coming soon |
| Video-MME | 85.2% | Coming soon | Coming soon |
| OfficeQA Pro | Coming soon | 60.3% | Coming soon |
| MMMU-Pro | Coming soon | 76% | Coming soon |

### Knowledge

- Winner: Not comparable
- LongCat-2.5 public-lane score: Coming soon
- Step 5 Preview public-lane score: 60.2 (Supported · #45/179)

| Benchmark | LongCat-2.5 | Step 5 Preview | Winner |
|-----------|-----------|-----------|--------|
| FrontierScience | 77% | Coming soon | Coming soon |
| GPQA-D | Coming soon | 93.5% | Coming soon |
| HLE | Coming soon | 46.5% | Coming soon |

## FAQ

### Which is better overall, LongCat-2.5 or Step 5 Preview?

Step 5 Preview has the higher overall point estimate. Conditional score ranges do not establish rank confidence.

### How many benchmarks does LongCat-2.5 cover on BenchLM?

LongCat-2.5 currently has 22 sourced benchmark scores on BenchLM.

### How many benchmarks does Step 5 Preview cover on BenchLM?

Step 5 Preview currently has 24 sourced benchmark scores on BenchLM.

## Related Comparisons

- [LongCat-2.5 vs Claude Fable 5.2](/compare/claude-fable-5-2-vs-longcat-2-5)
- [Step 5 Preview vs Claude Fable 5.2](/compare/claude-fable-5-2-vs-step-5-preview)
- [LongCat-2.5 vs Gemini 4 Carbon](/compare/gemini-4-carbon-vs-longcat-2-5)
- [Step 5 Preview vs Gemini 4 Carbon](/compare/gemini-4-carbon-vs-step-5-preview)

## Explore More

- [LongCat-2.5 profile](/models/longcat-2-5)
- [Step 5 Preview profile](/models/step-5-preview)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)