# Claude Haiku 4.5 vs Claude Opus 4.5

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

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

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

## Quick Verdict

Pick Claude Opus 4.5 if you want the stronger benchmark profile. Claude Haiku 4.5 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 42.47.
- The clearest category separation is in mathematics, where the averages are 28.8 for Claude Haiku 4.5 and 57.9 for Claude Opus 4.5.
- The biggest single benchmark swing is JobBench in Agentic, with scores of 16.0% and 32.3%.
- Claude Haiku 4.5 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.

## Model Snapshot

| Property | Claude Haiku 4.5 | Claude Opus 4.5 |
|----------|----------|----------|
| Creator | Anthropic | Anthropic |
| Type | Proprietary | Proprietary |
| Reasoning | Non-Reasoning | Non-Reasoning |
| Context | 200K | 200K |
| Overall Score | 42.47 | 54.89 |
| Benchmarks Covered | 10 | 45 |
| Pricing (input/output) | $1.00 / $5.00 | $5.00 / $25.00 |

## Category Breakdown

### Agentic

- Winner: Directional only
- Claude Haiku 4.5 public-lane score: 22 (Supported · #96/117)
- Claude Opus 4.5 public-lane score: 31.2 (Estimated · #78/117)

| Benchmark | Claude Haiku 4.5 | Claude Opus 4.5 | Winner |
|-----------|-----------|-----------|--------|
| JobBench | 16.0% | 32.3% | Claude Opus 4.5 |
| Terminal-Bench 2.1 (Vals) | 43.8% | Coming soon | Coming soon |
| 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 |

### Coding

- Winner: Directional only
- Claude Haiku 4.5 public-lane score: 19.6 (Supported · #124/143)
- Claude Opus 4.5 public-lane score: 42.6 (Estimated · #56/143)

| Benchmark | Claude Haiku 4.5 | Claude Opus 4.5 | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 73.3% | 80.9% | Claude Opus 4.5 |
| VulcanBench v3 | 76.2% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 41.2% | Coming soon | Coming soon |
| SWE-bench (Vals) | 66.6% | Coming soon | Coming soon |
| 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 |

### Reasoning

- Winner: Not comparable
- Claude Haiku 4.5 public-lane score: Coming soon
- Claude Opus 4.5 public-lane score: 73.3 (Unranked · 4 rankable rows)

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

### Multimodal & Grounded

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

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

### Knowledge

- Winner: Directional only
- Claude Haiku 4.5 public-lane score: 34.8 (Estimated · #119/169)
- Claude Opus 4.5 public-lane score: 49.3 (Estimated · #62/169)

| Benchmark | Claude Haiku 4.5 | Claude Opus 4.5 | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | 72.2% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 78.7% | Coming soon | Coming soon |
| GPQA | Coming soon | 87% | Coming soon |
| SuperGPQA | Coming soon | 70.6% | Coming soon |
| MMLU-Pro | Coming soon | 89.5% | 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 Haiku 4.5 public-lane score: Coming soon
- Claude Opus 4.5 public-lane score: 82.9 (#2/12)

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

### Instruction Following

- Winner: Not comparable
- Claude Haiku 4.5 public-lane score: Coming soon
- Claude Opus 4.5 public-lane score: 30.6 (#114/124)

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

### Mathematics

- Winner: Not comparable
- Claude Haiku 4.5 public-lane score: 28.8 (Unranked · 2 rankable rows)
- Claude Opus 4.5 public-lane score: 57.9 (#6/7)

| Benchmark | Claude Haiku 4.5 | Claude Opus 4.5 | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 5.903% | 20.690% | Claude Opus 4.5 |
| FrontierMath v2 (Tier 4) | 2.083% | 4.167% | Claude Opus 4.5 |
| 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 |

## FAQ

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

Claude Opus 4.5 is ahead overall on BenchLM right now.

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

The widest category gap is in mathematics, where the averages are 28.8 for Claude Haiku 4.5 and 57.9 for Claude Opus 4.5.

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

Claude Haiku 4.5 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 45 sourced benchmark scores on BenchLM.

## Related Comparisons

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

## Explore More

- [Claude Haiku 4.5 profile](/models/claude-haiku-4-5)
- [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)