# LongCat-2.5 vs Qwen3.8-Flash-Next

> Side-by-side benchmark comparison for LongCat-2.5 and Qwen3.8-Flash-Next across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/longcat-2-5-vs-qwen3-8-flash-next
- Last updated: November 9, 2026

- Shared sourced benchmarks: 7
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Qwen3.8-Flash-Next leads by point estimate. Conditional score ranges do not establish rank confidence. Choose using the category evidence and your own workload tests.

## Summary

- Qwen3.8-Flash-Next has the higher overall point estimate 55.73 to 0. Conditional score ranges do not establish rank confidence.
- The biggest single benchmark swing is Vision2Web in Multimodal & Grounded, with scores of 78.6% and 64.0%.
- Qwen3.8-Flash-Next is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- LongCat-2.5 also has the larger context window at 1M.

## Model Snapshot

| Property | LongCat-2.5 | Qwen3.8-Flash-Next |
|----------|----------|----------|
| Creator | Meituan | Alibaba |
| Type | Open Weight | Open Weight |
| Reasoning | Hybrid | Reasoning |
| Context | 1M | 262K |
| Overall Score | null | 55.73 |
| Benchmarks Covered | 22 | 25 |
| Pricing (input/output) | $0.30 / $1.20 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Not comparable
- LongCat-2.5 public-lane score: Coming soon
- Qwen3.8-Flash-Next public-lane score: 63.1 (Supported · #19/132)

| Benchmark | LongCat-2.5 | Qwen3.8-Flash-Next | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 88.4% | Coming soon | Coming soon |
| Terminal-Bench 4.0 | 38.50% | Coming soon | Coming soon |
| BrowseComp | 91.9% | Coming soon | Coming soon |
| AutomationBench | 51.8% | Coming soon | Coming soon |
| HLE w/ tools | 63.1% | Coming soon | Coming soon |
| Agents' Last Exam | 38.5% | 51.2% | Qwen3.8-Flash-Next |
| MCP Atlas | 83.1% | Coming soon | Coming soon |
| JobBench | 65.4% | 55.7% | 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 |
| CoWorkBench | Coming soon | 73.9% | Coming soon |
| Toolathlon-Verified | Coming soon | 73.5% | Coming soon |
| AndroidWorld | Coming soon | 84.5% | Coming soon |
| OSWorld 2.0 | Coming soon | 19.4% | Coming soon |

### Coding

- Winner: Not comparable
- LongCat-2.5 public-lane score: Coming soon
- Qwen3.8-Flash-Next public-lane score: 50.7 (Supported · #47/158)

| Benchmark | LongCat-2.5 | Qwen3.8-Flash-Next | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 88.4% | Coming soon | Coming soon |
| ProgramBench | 25.5% | Coming soon | Coming soon |
| DeepSWE | 64.6% | 58.7% | LongCat-2.5 |
| PaperBench | 82.1% | Coming soon | Coming soon |
| SWE-Atlas Codebase QnA | 58.3% | Coming soon | Coming soon |
| NL2Repo | 60.5% | 48.1% | LongCat-2.5 |
| SWE-bench Pro | Coming soon | 62.5% | Coming soon |
| SWE Multilingual | Coming soon | 81% | Coming soon |
| LiveCodeBench v6 | Coming soon | 91.9% | Coming soon |

### Reasoning

- Winner: Not comparable
- LongCat-2.5 public-lane score: Coming soon
- Qwen3.8-Flash-Next public-lane score: 55.5 (Estimated · #43/157)

### Multimodal & Grounded

- Winner: Not comparable
- LongCat-2.5 public-lane score: Coming soon
- Qwen3.8-Flash-Next public-lane score: 60.2 (Estimated · #36/67)

| Benchmark | LongCat-2.5 | Qwen3.8-Flash-Next | Winner |
|-----------|-----------|-----------|--------|
| Vision2Web | 78.6% | 64.0% | LongCat-2.5 |
| CharXiv | 90.2% | 90.6% | Qwen3.8-Flash-Next |
| MathVision w/ Python | 96.5% | 95.7% | LongCat-2.5 |
| Video-MME | 85.2% | Coming soon | Coming soon |
| ExtractBench (LlamaIndex) | Coming soon | 89.88% | Coming soon |
| ERQA | Coming soon | 72.3% | Coming soon |
| LVBench | Coming soon | 76.6% | Coming soon |
| RealWorldQA | Coming soon | 88.5% | Coming soon |
| MathVision | Coming soon | 90.6% | Coming soon |
| CharXiv w/o tools | Coming soon | 84.6% | Coming soon |

### Knowledge

- Winner: Not comparable
- LongCat-2.5 public-lane score: Coming soon
- Qwen3.8-Flash-Next public-lane score: 55.9 (Supported · #59/179)

| Benchmark | LongCat-2.5 | Qwen3.8-Flash-Next | Winner |
|-----------|-----------|-----------|--------|
| FrontierScience | 77% | Coming soon | Coming soon |
| GPQA | Coming soon | 91.7% | Coming soon |
| GPQA-D | Coming soon | 91.7% | Coming soon |
| HLE | Coming soon | 35.9% | Coming soon |
| HLE w/o tools | Coming soon | 35.9% | Coming soon |

### Instruction Following

- Winner: Not comparable
- LongCat-2.5 public-lane score: Coming soon
- Qwen3.8-Flash-Next public-lane score: 91.2 (#24/157)

| Benchmark | LongCat-2.5 | Qwen3.8-Flash-Next | Winner |
|-----------|-----------|-----------|--------|
| IFBench | Coming soon | 81.3% | Coming soon |

## FAQ

### Which is better overall, LongCat-2.5 or Qwen3.8-Flash-Next?

Qwen3.8-Flash-Next 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 Qwen3.8-Flash-Next cover on BenchLM?

Qwen3.8-Flash-Next currently has 25 sourced benchmark scores on BenchLM.

## Related Comparisons

- [LongCat-2.5 vs Claude Fable 5.2](/compare/claude-fable-5-2-vs-longcat-2-5)
- [Qwen3.8-Flash-Next vs Claude Fable 5.2](/compare/claude-fable-5-2-vs-qwen3-8-flash-next)
- [LongCat-2.5 vs Gemini 4 Carbon](/compare/gemini-4-carbon-vs-longcat-2-5)
- [Qwen3.8-Flash-Next vs Gemini 4 Carbon](/compare/gemini-4-carbon-vs-qwen3-8-flash-next)

## Explore More

- [LongCat-2.5 profile](/models/longcat-2-5)
- [Qwen3.8-Flash-Next profile](/models/qwen3-8-flash-next)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)