# Claude Sonnet 5 vs Ornith-1.5-9B

> Side-by-side benchmark comparison for Claude Sonnet 5 and Ornith-1.5-9B across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-sonnet-5-vs-ornith-1-5-9b
- Last updated: September 21, 2026

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

## Quick Verdict

Pick Claude Sonnet 5 if you want the stronger benchmark profile. Ornith-1.5-9B only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Claude Sonnet 5 leads overall 69.62 to 29.31.
- The clearest category separation is in knowledge, where the averages are 66.8 for Claude Sonnet 5 and 36.7 for Ornith-1.5-9B.
- The biggest single benchmark swing is HLE in Knowledge, with scores of 57.4% and 20.2%.
- Ornith-1.5-9B is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Claude Sonnet 5 also has the larger context window at 1M.

## Model Snapshot

| Property | Claude Sonnet 5 | Ornith-1.5-9B |
|----------|----------|----------|
| Creator | Anthropic | Ornith AI |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 262K |
| Overall Score | 69.62 | 29.31 |
| Benchmarks Covered | 26 | 16 |
| Pricing (input/output) | $2.00 / $10.00 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Coming soon
- Claude Sonnet 5 public-lane score: 66.1 (Supported · #11/154)
- Ornith-1.5-9B public-lane score: 44.8 (Estimated · #91/154)

| Benchmark | Claude Sonnet 5 | Ornith-1.5-9B | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 3.0 | 14.6% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 80.4% | Coming soon | Coming soon |
| BrowseComp | 84.7% | 56.4% | Claude Sonnet 5 |
| HLE w/ tools | 57.4% | 30.5% | Claude Sonnet 5 |
| OSWorld-Verified | 81.2% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 74.5% | Coming soon | Coming soon |
| ApprenticeBench | 16% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 46.2% | Coming soon |
| MCP Atlas | Coming soon | 54.2% | Coming soon |
| Toolathlon-Verified | Coming soon | 41.2% | Coming soon |
| WideResearch | Coming soon | 59.5% | Coming soon |
| Claw-Eval | Coming soon | 66.5% | Coming soon |

### Coding

- Winner: Coming soon
- Claude Sonnet 5 public-lane score: 64.8 (Supported · #13/156)
- Ornith-1.5-9B public-lane score: 44.9 (Estimated · #95/156)

| Benchmark | Claude Sonnet 5 | Ornith-1.5-9B | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 85.2% | 70.6% | Claude Sonnet 5 |
| SWE-bench Pro | 63.2% | 47.5% | Claude Sonnet 5 |
| SWE Multilingual | 78.3% | 54.4% | Claude Sonnet 5 |
| SWE Multimodal | 28.1% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 80.4% | Coming soon | Coming soon |
| FrontierCode 1.1 Main | 42.7% | Coming soon | Coming soon |
| cursorBench32 | 61.5% | Coming soon | Coming soon |
| VulcanBench CII v1 | 89.2% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 82.4% | Coming soon | Coming soon |
| SWE-bench (Vals) | 79.6% | Coming soon | Coming soon |
| cursorBench40 | 34.1% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 46.2% | Coming soon |
| NL2Repo | Coming soon | 32.4% | Coming soon |

### Reasoning

- Winner: Coming soon
- Claude Sonnet 5 public-lane score: 77.4 (Unranked · 2 rankable rows)
- Ornith-1.5-9B public-lane score: Coming soon

### Multimodal & Grounded

- Winner: Coming soon
- Claude Sonnet 5 public-lane score: 77.4 (#14/49)
- Ornith-1.5-9B public-lane score: Coming soon

| Benchmark | Claude Sonnet 5 | Ornith-1.5-9B | Winner |
|-----------|-----------|-----------|--------|
| CharXiv | 88.3% | Coming soon | Coming soon |
| CharXiv w/o tools | 77% | Coming soon | Coming soon |

### Knowledge

- Winner: Coming soon
- Claude Sonnet 5 public-lane score: 66.8 (Supported · #20/186)
- Ornith-1.5-9B public-lane score: 36.7 (Estimated · #155/186)

| Benchmark | Claude Sonnet 5 | Ornith-1.5-9B | Winner |
|-----------|-----------|-----------|--------|
| HLE | 57.4% | 20.2% | Claude Sonnet 5 |
| HLE w/o tools | 43.2% | 20.2% | Claude Sonnet 5 |
| HLE-Verified | 31.0% | Coming soon | Coming soon |
| LABBench2 | 80.1% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 88.9% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 87.5% | Coming soon | Coming soon |
| GPQA | Coming soon | 86.4% | Coming soon |
| GPQA-D | Coming soon | 86.4% | Coming soon |

## FAQ

### Which is better overall, Claude Sonnet 5 or Ornith-1.5-9B?

Claude Sonnet 5 is ahead overall on BenchLM right now.

### Where is the biggest gap between Claude Sonnet 5 and Ornith-1.5-9B?

The widest category gap is in knowledge, where the averages are 66.8 for Claude Sonnet 5 and 36.7 for Ornith-1.5-9B.

### How many benchmarks does Claude Sonnet 5 cover on BenchLM?

Claude Sonnet 5 currently has 26 sourced benchmark scores on BenchLM.

### How many benchmarks does Ornith-1.5-9B cover on BenchLM?

Ornith-1.5-9B currently has 16 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Claude Sonnet 5 vs Ornith-1.5-397B](/compare/claude-sonnet-5-vs-ornith-1-5-397b)
- [Ornith-1.5-9B vs Ornith-1.5-397B](/compare/ornith-1-5-397b-vs-ornith-1-5-9b)
- [Claude Sonnet 5 vs Ornith-1.5-35B-A3B](/compare/claude-sonnet-5-vs-ornith-1-5-35b-a3b)
- [Ornith-1.5-9B vs Ornith-1.5-35B-A3B](/compare/ornith-1-5-35b-a3b-vs-ornith-1-5-9b)

## Explore More

- [Claude Sonnet 5 profile](/models/claude-sonnet-5)
- [Ornith-1.5-9B profile](/models/ornith-1-5-9b)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)