# Claude Opus 4.5 vs DeepSeek V3

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

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

- Shared sourced benchmarks: 5
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.7

## Quick Verdict

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

## Summary

- Claude Opus 4.5 leads overall 54.89 to 31.86.
- The clearest category separation is in mathematics, where the averages are 57.9 for Claude Opus 4.5 and 26 for DeepSeek V3.
- The biggest single benchmark swing is SWE-bench Verified in Coding, with scores of 80.9% and 42%.
- DeepSeek V3 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Claude Opus 4.5 also has the larger context window at 200K.

## Model Snapshot

| Property | Claude Opus 4.5 | DeepSeek V3 |
|----------|----------|----------|
| Creator | Anthropic | DeepSeek |
| Type | Proprietary | Open Weight |
| Reasoning | Non-Reasoning | Non-Reasoning |
| Context | 200K | 128K |
| Overall Score | 54.89 | 31.86 |
| Benchmarks Covered | 45 | 6 |
| Pricing (input/output) | $5.00 / $25.00 | $0.27 / $1.10 |

## Category Breakdown

### Agentic

- Winner: Directional only
- Claude Opus 4.5 public-lane score: 31.2 (Estimated · #78/117)
- DeepSeek V3 public-lane score: 12.1 (Estimated · #113/117)

| Benchmark | Claude Opus 4.5 | DeepSeek V3 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 59.3% | Coming soon | Coming soon |
| OSWorld-Verified | 66.3% | Coming soon | Coming soon |
| OSWorld | 66.3% | Coming soon | Coming soon |
| Claw-Eval | 59.6% | Coming soon | Coming soon |
| QwenClawBench | 52.3% | Coming soon | Coming soon |
| τ³-bench results | 70.2% | Coming soon | Coming soon |
| VITA-Bench | 23.3% | Coming soon | Coming soon |
| DeepPlanning | 26.4% | Coming soon | Coming soon |
| Toolathlon | 43.5% | Coming soon | Coming soon |
| MCP Atlas | 42.3% | Coming soon | Coming soon |
| MCP-Tasks | 71.8% | Coming soon | Coming soon |
| WideResearch | 76.4% | Coming soon | Coming soon |
| CyberGym | 50.6% | Coming soon | Coming soon |
| Gert Labs | 64.23% | Coming soon | Coming soon |
| JobBench | 32.3% | Coming soon | Coming soon |

### Coding

- Winner: Directional only
- Claude Opus 4.5 public-lane score: 42.6 (Estimated · #56/143)
- DeepSeek V3 public-lane score: 18.6 (Estimated · #131/143)

| Benchmark | Claude Opus 4.5 | DeepSeek V3 | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 80.9% | 42% | Claude Opus 4.5 |
| LiveCodeBench v6 | 84.8% | Coming soon | Coming soon |
| SWE-bench Pro | 57.1% | Coming soon | Coming soon |
| SWE Multilingual | 77.5% | Coming soon | Coming soon |
| NL2Repo | 43.2% | Coming soon | Coming soon |
| LiveCodeBench | Coming soon | 37.6% | Coming soon |

### Reasoning

- Winner: Not comparable
- Claude Opus 4.5 public-lane score: 73.3 (Unranked · 4 rankable rows)
- DeepSeek V3 public-lane score: 42.3 (Unranked · 2 rankable rows)

| Benchmark | Claude Opus 4.5 | DeepSeek V3 | Winner |
|-----------|-----------|-----------|--------|
| LongBench v2 | 64.4% | Coming soon | Coming soon |
| AI-Needle | 74% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- Claude Opus 4.5 public-lane score: 24.5 (#48/50)
- DeepSeek V3 public-lane score: Coming soon

| Benchmark | Claude Opus 4.5 | DeepSeek V3 | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 70.6% | Coming soon | Coming soon |
| MathVision | 74.3% | Coming soon | Coming soon |
| CharXiv | 68.5% | Coming soon | Coming soon |
| VideoMMMU | 84.4% | Coming soon | Coming soon |
| ScreenSpot Pro | 45.7% | Coming soon | Coming soon |
| V* | 67.0% | Coming soon | Coming soon |

### Knowledge

- Winner: Directional only
- Claude Opus 4.5 public-lane score: 49.3 (Estimated · #62/169)
- DeepSeek V3 public-lane score: 30.2 (Estimated · #140/169)

| Benchmark | Claude Opus 4.5 | DeepSeek V3 | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 87% | 59.1% | Claude Opus 4.5 |
| SuperGPQA | 70.6% | Coming soon | Coming soon |
| MMLU-Pro | 89.5% | 75.9% | Claude Opus 4.5 |
| MMLU-Redux | 96.6% | Coming soon | Coming soon |
| C-Eval | 92.2% | Coming soon | Coming soon |
| HLE | 30.8% | Coming soon | Coming soon |

### Multilingual

- Winner: Not comparable
- Claude Opus 4.5 public-lane score: 82.9 (#2/12)
- DeepSeek V3 public-lane score: Coming soon

| Benchmark | Claude Opus 4.5 | DeepSeek V3 | Winner |
|-----------|-----------|-----------|--------|
| MMLU-ProX | 85.7% | Coming soon | Coming soon |
| NOVA-63 | 56.7% | Coming soon | Coming soon |

### Instruction Following

- Winner: Directional only
- Claude Opus 4.5 public-lane score: 30.6 (#114/124)
- DeepSeek V3 public-lane score: 38.2 (#103/124)

| Benchmark | Claude Opus 4.5 | DeepSeek V3 | Winner |
|-----------|-----------|-----------|--------|
| IFEval | 90.9% | 86.1% | Claude Opus 4.5 |
| IFBench | 58% | Coming soon | Coming soon |

### Mathematics

- Winner: Not comparable
- Claude Opus 4.5 public-lane score: 57.9 (#6/7)
- DeepSeek V3 public-lane score: 26 (Unranked · 1 rankable row)

| Benchmark | Claude Opus 4.5 | DeepSeek V3 | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | 95.1% | Coming soon | Coming soon |
| HMMT Feb 2025 | 92.9% | Coming soon | Coming soon |
| HMMT Nov 2025 | 93.3% | Coming soon | Coming soon |
| HMMT Feb 2026 | 85.3% | Coming soon | Coming soon |
| MMAnswerBench | 84.0% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | 20.690% | 1.724% | Claude Opus 4.5 |
| FrontierMath v2 (Tier 4) | 4.167% | Coming soon | Coming soon |

## FAQ

### Which is better overall, Claude Opus 4.5 or DeepSeek V3?

Claude Opus 4.5 is ahead overall on BenchLM right now.

### Where is the biggest gap between Claude Opus 4.5 and DeepSeek V3?

The widest category gap is in mathematics, where the averages are 57.9 for Claude Opus 4.5 and 26 for DeepSeek V3.

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

Claude Opus 4.5 currently has 45 sourced benchmark scores on BenchLM.

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

DeepSeek V3 currently has 6 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Claude Opus 4.5 vs Claude Opus 4.5 Thinking](/compare/claude-opus-4-5-vs-claude-opus-4-5-thinking)
- [DeepSeek V3 vs Claude Opus 4.5 Thinking](/compare/claude-opus-4-5-thinking-vs-deepseek-v3)
- [Claude Opus 4.5 vs GPT-6 Astra](/compare/claude-opus-4-5-vs-gpt-6-astra)
- [DeepSeek V3 vs GPT-6 Astra](/compare/deepseek-v3-vs-gpt-6-astra)

## Explore More

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