# Claude Sonnet 4.5 vs DeepSeek V3.2

> Side-by-side benchmark comparison for Claude Sonnet 4.5 and DeepSeek V3.2 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-sonnet-4-5-vs-deepseek-v3-2
- Last updated: September 29, 2026

- Shared sourced benchmarks: 4
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.7

## Quick Verdict

Pick DeepSeek V3.2 if you want the stronger benchmark profile. Claude Sonnet 4.5 only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- DeepSeek V3.2 leads overall 50.13 to 47.85.
- The clearest category separation is in reasoning, where the averages are 19.2 for Claude Sonnet 4.5 and 53.6 for DeepSeek V3.2.
- The biggest single benchmark swing is Gert Labs in Agentic, with scores of 48.51% and 29.57%.
- DeepSeek V3.2 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Claude Sonnet 4.5 also has the larger context window at 200K.

## Model Snapshot

| Property | Claude Sonnet 4.5 | DeepSeek V3.2 |
|----------|----------|----------|
| Creator | Anthropic | DeepSeek |
| Type | Proprietary | Open Weight |
| Reasoning | Non-Reasoning | Non-Reasoning |
| Context | 200K | 128K |
| Overall Score | 47.85 | 50.13 |
| Benchmarks Covered | 11 | 7 |
| Pricing (input/output) | $3.00 / $15.00 | $0.28 / $0.42 |

## Category Breakdown

### Agentic

- Winner: Not comparable
- Claude Sonnet 4.5 public-lane score: 34.6 (Estimated · #67/117)
- DeepSeek V3.2 public-lane score: Coming soon

| Benchmark | Claude Sonnet 4.5 | DeepSeek V3.2 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 50% | Coming soon | Coming soon |
| OSWorld-Verified | 61.4% | Coming soon | Coming soon |
| VITA-Bench | 17.0% | 18.5% | DeepSeek V3.2 |
| Gert Labs | 48.51% | 29.57% | Claude Sonnet 4.5 |
| JobBench | 27.7% | Coming soon | Coming soon |
| Claw-Eval | Coming soon | 40.2% | Coming soon |

### Coding

- Winner: Not comparable
- Claude Sonnet 4.5 public-lane score: Coming soon
- DeepSeek V3.2 public-lane score: 32.1 (Estimated · #89/143)

| Benchmark | Claude Sonnet 4.5 | DeepSeek V3.2 | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 77.2% | Coming soon | Coming soon |
| SWE-Rebench | Coming soon | 60.9% | Coming soon |
| React Native Evals | Coming soon | 71.5% | Coming soon |

### Reasoning

- Winner: Not comparable
- Claude Sonnet 4.5 public-lane score: 19.2 (Unranked · 1 rankable row)
- DeepSeek V3.2 public-lane score: 53.6 (Unranked · 2 rankable rows)

| Benchmark | Claude Sonnet 4.5 | DeepSeek V3.2 | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 13.6% | Coming soon | Coming soon |

### Knowledge

- Winner: Not comparable
- Claude Sonnet 4.5 public-lane score: Coming soon
- DeepSeek V3.2 public-lane score: 41.7 (Estimated · #91/169)

| Benchmark | Claude Sonnet 4.5 | DeepSeek V3.2 | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 83.4% | Coming soon | Coming soon |

### Instruction Following

- Winner: Not comparable
- Claude Sonnet 4.5 public-lane score: Coming soon
- DeepSeek V3.2 public-lane score: 56.7 (#75/124)

### Mathematics

- Winner: Not comparable
- Claude Sonnet 4.5 public-lane score: 34.6 (Unranked · 2 rankable rows)
- DeepSeek V3.2 public-lane score: 40 (Unranked · 2 rankable rows)

| Benchmark | Claude Sonnet 4.5 | DeepSeek V3.2 | Winner |
|-----------|-----------|-----------|--------|
| AIME 2025 | 87% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | 13.495% | 22.100% | DeepSeek V3.2 |
| FrontierMath v2 (Tier 4) | 4.167% | 2.100% | Claude Sonnet 4.5 |

## FAQ

### Which is better overall, Claude Sonnet 4.5 or DeepSeek V3.2?

DeepSeek V3.2 is ahead overall on BenchLM right now.

### Where is the biggest gap between Claude Sonnet 4.5 and DeepSeek V3.2?

The widest category gap is in reasoning, where the averages are 19.2 for Claude Sonnet 4.5 and 53.6 for DeepSeek V3.2.

### How many benchmarks does Claude Sonnet 4.5 cover on BenchLM?

Claude Sonnet 4.5 currently has 11 sourced benchmark scores on BenchLM.

### How many benchmarks does DeepSeek V3.2 cover on BenchLM?

DeepSeek V3.2 currently has 7 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Claude Sonnet 4.5 vs Claude Sonnet 4.5 Thinking](/compare/claude-sonnet-4-5-vs-claude-sonnet-4-5-thinking)
- [DeepSeek V3.2 vs Claude Sonnet 4.5 Thinking](/compare/claude-sonnet-4-5-thinking-vs-deepseek-v3-2)
- [Claude Sonnet 4.5 vs DeepSeek V3.2 (Thinking)](/compare/claude-sonnet-4-5-vs-deepseek-v3-2-thinking)
- [DeepSeek V3.2 vs DeepSeek V3.2 (Thinking)](/compare/deepseek-v3-2-vs-deepseek-v3-2-thinking)

## Explore More

- [Claude Sonnet 4.5 profile](/models/claude-sonnet-4-5)
- [DeepSeek V3.2 profile](/models/deepseek-v3-2)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)