# Claude 3.5 Haiku vs Claude Opus 4.5

> Side-by-side benchmark comparison for Claude 3.5 Haiku and Claude Opus 4.5 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-3-5-haiku-vs-claude-opus-4-5
- Last updated: October 14, 2026

- Shared sourced benchmarks: 4
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Pick Claude Opus 4.5 if you want the stronger benchmark profile. Claude 3.5 Haiku 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 53.77 to 47.
- The biggest single benchmark swing is GPQA in Knowledge, with scores of 41.6% and 87%.

## Model Snapshot

| Property | Claude 3.5 Haiku | Claude Opus 4.5 |
|----------|----------|----------|
| Creator | Anthropic | Anthropic |
| Type | Proprietary | Proprietary |
| Reasoning | Non-Reasoning | Non-Reasoning |
| Context | 200K | 200K |
| Overall Score | null | 53.77 |
| Benchmarks Covered | 10 | 61 |
| Pricing (input/output) | N/A | $5.00 / $25.00 |

## Category Breakdown

### Agentic

- Winner: Not comparable
- Claude 3.5 Haiku public-lane score: Coming soon
- Claude Opus 4.5 public-lane score: 31.2 (Estimated · #87/124)

| Benchmark | Claude 3.5 Haiku | Claude Opus 4.5 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | Coming soon | 59.3% | Coming soon |
| OSWorld-Verified | Coming soon | 66.3% | Coming soon |
| OSWorld | Coming soon | 66.3% | Coming soon |
| Claw-Eval | Coming soon | 59.6% | Coming soon |
| QwenClawBench | Coming soon | 52.3% | Coming soon |
| τ³-bench results | Coming soon | 70.2% | Coming soon |
| VITA-Bench | Coming soon | 23.3% | Coming soon |
| DeepPlanning | Coming soon | 26.4% | Coming soon |
| Toolathlon | Coming soon | 43.5% | Coming soon |
| MCP Atlas | Coming soon | 42.3% | Coming soon |
| MCP-Tasks | Coming soon | 71.8% | Coming soon |
| WideResearch | Coming soon | 76.4% | Coming soon |
| CyberGym | Coming soon | 50.6% | Coming soon |
| Gert Labs | Coming soon | 64.23% | Coming soon |
| JobBench | Coming soon | 32.3% | Coming soon |

### Coding

- Winner: Not comparable
- Claude 3.5 Haiku public-lane score: Coming soon
- Claude Opus 4.5 public-lane score: 40.7 (Estimated · #62/149)

| Benchmark | Claude 3.5 Haiku | Claude Opus 4.5 | Winner |
|-----------|-----------|-----------|--------|
| HumanEval | 88.1% | Coming soon | Coming soon |
| SWE-bench Verified | 40.6% | 80.9% | Claude Opus 4.5 |
| LiveCodeBench v6 | Coming soon | 84.8% | Coming soon |
| SWE-bench Pro | Coming soon | 57.1% | Coming soon |
| SWE Multilingual | Coming soon | 77.5% | Coming soon |
| NL2Repo | Coming soon | 43.2% | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 59.3% | Coming soon |

### Reasoning

- Winner: Not comparable
- Claude 3.5 Haiku public-lane score: Coming soon
- Claude Opus 4.5 public-lane score: 78.3 (Unranked · 4 rankable rows)

| Benchmark | Claude 3.5 Haiku | Claude Opus 4.5 | Winner |
|-----------|-----------|-----------|--------|
| BBH | 86.6% | Coming soon | Coming soon |
| DROP | 83.1% | Coming soon | Coming soon |
| LongBench v2 | Coming soon | 64.4% | Coming soon |
| AI-Needle | Coming soon | 74% | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- Claude 3.5 Haiku public-lane score: Coming soon
- Claude Opus 4.5 public-lane score: 48.6 (#49/54)

| Benchmark | Claude 3.5 Haiku | Claude Opus 4.5 | Winner |
|-----------|-----------|-----------|--------|
| MMMU | Coming soon | 80.7% | Coming soon |
| MMMU-Pro | Coming soon | 70.6% | Coming soon |
| RealWorldQA | Coming soon | 77.0% | Coming soon |
| OmniDocBench 1.5 | Coming soon | 87.7% | Coming soon |
| Video-MME (with subtitle) | Coming soon | 77.6% | Coming soon |
| Video-MME (w/o subtitle) | Coming soon | 81.4% | Coming soon |
| MathVision | Coming soon | 74.3% | Coming soon |
| We-Math | Coming soon | 70.0% | Coming soon |
| DynaMath | Coming soon | 79.7% | Coming soon |
| SimpleVQA | Coming soon | 65.7% | Coming soon |
| CharXiv | Coming soon | 68.5% | Coming soon |
| CountBench | Coming soon | 90.6% | Coming soon |
| AI2D_TEST | Coming soon | 87.7% | Coming soon |
| ERQA | Coming soon | 46.8% | Coming soon |
| VideoMMMU | Coming soon | 84.4% | Coming soon |
| MLVU (M-Avg) | Coming soon | 81.7% | Coming soon |
| ScreenSpot Pro | Coming soon | 45.7% | Coming soon |
| V* | Coming soon | 67.0% | Coming soon |

### Knowledge

- Winner: Not comparable
- Claude 3.5 Haiku public-lane score: Coming soon
- Claude Opus 4.5 public-lane score: 51.1 (Estimated · #74/181)

| Benchmark | Claude 3.5 Haiku | Claude Opus 4.5 | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 41.6% | 87% | Claude Opus 4.5 |
| MMLU-Pro | 65% | 89.5% | Claude Opus 4.5 |
| MMLU | 80.3% | Coming soon | Coming soon |
| SuperGPQA | Coming soon | 70.6% | Coming soon |
| MMLU-Redux | Coming soon | 96.6% | Coming soon |
| C-Eval | Coming soon | 92.2% | Coming soon |
| HLE | Coming soon | 30.8% | Coming soon |

### Multilingual

- Winner: Not comparable
- Claude 3.5 Haiku public-lane score: Coming soon
- Claude Opus 4.5 public-lane score: 96.5 (#2/17)

| Benchmark | Claude 3.5 Haiku | Claude Opus 4.5 | Winner |
|-----------|-----------|-----------|--------|
| MGSM | 85.6% | Coming soon | Coming soon |
| MMLU-ProX | Coming soon | 85.7% | Coming soon |
| NOVA-63 | Coming soon | 56.7% | Coming soon |
| INCLUDE | Coming soon | 86.2% | Coming soon |
| PolyMath | Coming soon | 79.0% | Coming soon |
| MAXIFE | Coming soon | 79.2% | Coming soon |

### Instruction Following

- Winner: Not comparable
- Claude 3.5 Haiku public-lane score: Coming soon
- Claude Opus 4.5 public-lane score: 31.9 (#116/128)

| Benchmark | Claude 3.5 Haiku | Claude Opus 4.5 | Winner |
|-----------|-----------|-----------|--------|
| IFEval | 85.9% | 90.9% | Claude Opus 4.5 |
| IFBench | Coming soon | 58% | Coming soon |

### Mathematics

- Winner: Not comparable
- Claude 3.5 Haiku public-lane score: Coming soon
- Claude Opus 4.5 public-lane score: 61.3 (#9/12)

| Benchmark | Claude 3.5 Haiku | Claude Opus 4.5 | Winner |
|-----------|-----------|-----------|--------|
| AIME 2024 | 5.3% | Coming soon | Coming soon |
| AIME26 | Coming soon | 95.1% | Coming soon |
| HMMT Feb 2025 | Coming soon | 92.9% | Coming soon |
| HMMT Nov 2025 | Coming soon | 93.3% | Coming soon |
| HMMT Feb 2026 | Coming soon | 85.3% | Coming soon |
| MMAnswerBench | Coming soon | 84.0% | Coming soon |
| FrontierMath v2 (Tiers 1-3) | Coming soon | 34.386% | Coming soon |
| FrontierMath v2 (Tier 4) | Coming soon | 4.878% | Coming soon |

## FAQ

### Which is better overall, Claude 3.5 Haiku or Claude Opus 4.5?

Claude Opus 4.5 is ahead overall on BenchLM right now.

### How many benchmarks does Claude 3.5 Haiku cover on BenchLM?

Claude 3.5 Haiku currently has 10 sourced benchmark scores on BenchLM.

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

Claude Opus 4.5 currently has 61 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Claude 3.5 Haiku vs Claude Opus 4.5 Thinking](/compare/claude-3-5-haiku-vs-claude-opus-4-5-thinking)
- [Claude Opus 4.5 vs Claude Opus 4.5 Thinking](/compare/claude-opus-4-5-vs-claude-opus-4-5-thinking)
- [Claude 3.5 Haiku vs Claude Opus 5.5](/compare/claude-3-5-haiku-vs-claude-opus-5-5)
- [Claude Opus 4.5 vs Claude Opus 5.5](/compare/claude-opus-4-5-vs-claude-opus-5-5)

## Explore More

- [Claude 3.5 Haiku profile](/models/claude-3-5-haiku)
- [Claude Opus 4.5 profile](/models/claude-opus-4-5)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)