# Claude Sonnet 5 vs Solar Pro 4

> Side-by-side benchmark comparison for Claude Sonnet 5 and Solar Pro 4 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-sonnet-5-vs-solar-pro-4
- Last updated: September 10, 2026

- Shared sourced benchmarks: 2
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Evidence is too thin for a benchmark verdict: Claude Sonnet 5 and Solar Pro 4 share only 2 sourced benchmark rows.

## Summary

- Only 2 shared sourced benchmark rows are available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- Solar Pro 4 has the lower published output-token price.
- Claude Sonnet 5 has the larger published context window at 1M.

## Model Snapshot

| Property | Claude Sonnet 5 | Solar Pro 4 |
|----------|----------|----------|
| Creator | Anthropic | Upstage |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 512K |
| Independent public score (not head-to-head) | 69.84 | null |
| Benchmarks Covered | 24 | 10 |
| Pricing (input/output) | $2.00 / $10.00 | $0.30 / $1.20 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Claude Sonnet 5 public-lane score: 65.8 (Supported · #11/152)
- Solar Pro 4 public-lane score: Coming soon

| Benchmark | Claude Sonnet 5 | Solar Pro 4 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 3.0 | 14.6% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 80.4% | Coming soon | Coming soon |
| BrowseComp | 84.7% | 49.2% | Claude Sonnet 5 |
| HLE w/ tools | 57.4% | Coming soon | Coming soon |
| OSWorld-Verified | 81.2% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 74.5% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 57.0% | Coming soon |
| MCP Atlas | Coming soon | 61.4% | Coming soon |
| APEX-Agents | Coming soon | 18.7% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Claude Sonnet 5 public-lane score: 64 (Supported · #13/151)
- Solar Pro 4 public-lane score: Coming soon

| Benchmark | Claude Sonnet 5 | Solar Pro 4 | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 85.2% | 70.6% | Claude Sonnet 5 |
| SWE-bench Pro | 63.2% | Coming soon | Coming soon |
| SWE Multilingual | 78.3% | Coming soon | Coming soon |
| 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 |
| Terminal-Bench 2.1 | Coming soon | 57.0% | Coming soon |
| LiveCodeBench | Coming soon | 87.8% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Claude Sonnet 5 public-lane score: 77.5 (#13/48)
- Solar Pro 4 public-lane score: Coming soon

| Benchmark | Claude Sonnet 5 | Solar Pro 4 | Winner |
|-----------|-----------|-----------|--------|
| CharXiv | 88.3% | Coming soon | Coming soon |
| CharXiv w/o tools | 77% | Coming soon | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Claude Sonnet 5 public-lane score: 77.4 (Unranked · 2 rankable rows)
- Solar Pro 4 public-lane score: Coming soon

### Knowledge

- Winner: Insufficient shared evidence
- Claude Sonnet 5 public-lane score: 66.6 (Supported · #20/183)
- Solar Pro 4 public-lane score: Coming soon

| Benchmark | Claude Sonnet 5 | Solar Pro 4 | Winner |
|-----------|-----------|-----------|--------|
| HLE | 57.4% | Coming soon | Coming soon |
| HLE w/o tools | 43.2% | Coming soon | Coming soon |
| 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-D | Coming soon | 89.0% | Coming soon |
| MMLU-Pro | Coming soon | 86.3% | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- Claude Sonnet 5 public-lane score: Coming soon
- Solar Pro 4 public-lane score: Coming soon

| Benchmark | Claude Sonnet 5 | Solar Pro 4 | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | Coming soon | 95.3% | Coming soon |

## FAQ

### Is there enough evidence to pick between Claude Sonnet 5 and Solar Pro 4?

Not yet. The models share only 2 sourced benchmark rows, so this mirror reports the available measurements and metadata without naming a broad winner.

### What can I compare safely on this page?

Published pricing, context windows, model type, and individual shared benchmark rows are directly comparable. Independent overall scores and non-overlapping benchmark coverage are labeled separately and should not be read as a controlled head-to-head result.

## Related Comparisons

- [Claude Sonnet 5 vs Solar Pro 2](/compare/claude-sonnet-5-vs-solar-pro-2)
- [Solar Pro 4 vs Solar Pro 2](/compare/solar-pro-2-vs-solar-pro-4)
- [Claude Sonnet 5 vs Solar Pro 3](/compare/claude-sonnet-5-vs-solar-pro-3)
- [Solar Pro 4 vs Solar Pro 3](/compare/solar-pro-3-vs-solar-pro-4)

## Explore More

- [Claude Sonnet 5 profile](/models/claude-sonnet-5)
- [Solar Pro 4 profile](/models/solar-pro-4)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)