# Claude Sonnet 4.6 vs LongCat-2.5

> Side-by-side benchmark comparison for Claude Sonnet 4.6 and LongCat-2.5 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-sonnet-4-6-vs-longcat-2-5
- Last updated: November 9, 2026

- Shared sourced benchmarks: 3
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Evidence is too thin for a benchmark verdict: Claude Sonnet 4.6 and LongCat-2.5 share only 3 sourced benchmark rows.

## Summary

- Only 3 shared sourced benchmark rows are available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- LongCat-2.5 has the lower published output-token price.
- LongCat-2.5 has the larger published context window at 1M.

## Model Snapshot

| Property | Claude Sonnet 4.6 | LongCat-2.5 |
|----------|----------|----------|
| Creator | Anthropic | Meituan |
| Type | Proprietary | Open Weight |
| Reasoning | Non-Reasoning | Hybrid |
| Context | 200K | 1M |
| Independent public score (not head-to-head) | 55.51 | null |
| Benchmarks Covered | 28 | 22 |
| Pricing (input/output) | $3.00 / $15.00 | $0.30 / $1.20 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Claude Sonnet 4.6 public-lane score: 46.6 (Supported · #55/132)
- LongCat-2.5 public-lane score: Coming soon

| Benchmark | Claude Sonnet 4.6 | LongCat-2.5 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 59.1% | Coming soon | Coming soon |
| OSWorld-Verified | 72.1% | Coming soon | Coming soon |
| Claw-Eval | 67.8% | 78.3% | LongCat-2.5 |
| CyberGym | 65.2% | Coming soon | Coming soon |
| Gert Labs | 62.92% | Coming soon | Coming soon |
| OSWorld 2.0 | 8.3% | Coming soon | Coming soon |
| JobBench | 36.9% | 65.4% | LongCat-2.5 |
| Terminal-Bench 2.1 (Vals) | 57.3% | Coming soon | Coming soon |
| ApprenticeBench | 2% | Coming soon | Coming soon |
| MazeBench | 0% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 88.4% | Coming soon |
| Terminal-Bench 4.0 | Coming soon | 38.50% | Coming soon |
| BrowseComp | Coming soon | 91.9% | Coming soon |
| AutomationBench | Coming soon | 51.8% | Coming soon |
| HLE w/ tools | Coming soon | 63.1% | Coming soon |
| Agents' Last Exam | Coming soon | 38.5% | Coming soon |
| MCP Atlas | Coming soon | 83.1% | Coming soon |
| skillsBench | Coming soon | 63.3% | Coming soon |
| SpreadsheetBench 2 | Coming soon | 34.9% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Claude Sonnet 4.6 public-lane score: 45.1 (Supported · #59/158)
- LongCat-2.5 public-lane score: Coming soon

| Benchmark | Claude Sonnet 4.6 | LongCat-2.5 | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 79.6% | Coming soon | Coming soon |
| SWE-Rebench | 60.7% | Coming soon | Coming soon |
| React Native Evals | 80.6% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 59.1% | Coming soon | Coming soon |
| Vibe Code Bench | 51.48% | Coming soon | Coming soon |
| cursorBench31 | 48.8% | Coming soon | Coming soon |
| FrontierCode 1.1 Main | 24.3% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 82.1% | Coming soon | Coming soon |
| SWE-bench (Vals) | 77.4% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 88.4% | Coming soon |
| ProgramBench | Coming soon | 25.5% | Coming soon |
| DeepSWE | Coming soon | 64.6% | Coming soon |
| PaperBench | Coming soon | 82.1% | Coming soon |
| SWE-Atlas Codebase QnA | Coming soon | 58.3% | Coming soon |
| NL2Repo | Coming soon | 60.5% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Claude Sonnet 4.6 public-lane score: 49.7 (Supported · #54/157)
- LongCat-2.5 public-lane score: Coming soon

| Benchmark | Claude Sonnet 4.6 | LongCat-2.5 | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 58.3% | Coming soon | Coming soon |
| ARC-AGI-1 | 86.00% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Claude Sonnet 4.6 public-lane score: 53.2 (Supported · #49/67)
- LongCat-2.5 public-lane score: Coming soon

| Benchmark | Claude Sonnet 4.6 | LongCat-2.5 | Winner |
|-----------|-----------|-----------|--------|
| CharXiv | 77.4% | 90.2% | LongCat-2.5 |
| Vision2Web | Coming soon | 78.6% | Coming soon |
| MathVision w/ Python | Coming soon | 96.5% | Coming soon |
| Video-MME | Coming soon | 85.2% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Claude Sonnet 4.6 public-lane score: 54.3 (Supported · #62/179)
- LongCat-2.5 public-lane score: Coming soon

| Benchmark | Claude Sonnet 4.6 | LongCat-2.5 | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 89.9% | Coming soon | Coming soon |
| SuperGPQA | 95% | Coming soon | Coming soon |
| MMLU-Pro | 79.2% | Coming soon | Coming soon |
| HLE | 49% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 85.6% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 87.3% | Coming soon | Coming soon |
| FrontierScience | Coming soon | 77% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Claude Sonnet 4.6 public-lane score: 48 (#106/157)
- LongCat-2.5 public-lane score: Coming soon

## FAQ

### Is there enough evidence to pick between Claude Sonnet 4.6 and LongCat-2.5?

Not yet. The models share only 3 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

- [Claude Sonnet 4.6 vs Claude Fable 5.2](/compare/claude-fable-5-2-vs-claude-sonnet-4-6)
- [LongCat-2.5 vs Claude Fable 5.2](/compare/claude-fable-5-2-vs-longcat-2-5)
- [Claude Sonnet 4.6 vs Gemini 4 Carbon](/compare/claude-sonnet-4-6-vs-gemini-4-carbon)
- [LongCat-2.5 vs Gemini 4 Carbon](/compare/gemini-4-carbon-vs-longcat-2-5)

## Explore More

- [Claude Sonnet 4.6 profile](/models/claude-sonnet-4-6)
- [LongCat-2.5 profile](/models/longcat-2-5)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)