# Qwen3.5 Plus vs Solar Open 2

> Side-by-side benchmark comparison for Qwen3.5 Plus and Solar Open 2 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/qwen3-5-plus-vs-solar-open-2
- Last updated: September 10, 2026

- Shared sourced benchmarks: 0
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

No benchmark verdict yet: there is no shared sourced benchmark row for Qwen3.5 Plus and Solar Open 2.

## Summary

- Qwen3.5 Plus and Solar Open 2 do not currently share a sourced benchmark row. The mirror therefore compares metadata, pricing, context windows, and each model's separately reported coverage without naming a benchmark winner.

## Model Snapshot

| Property | Qwen3.5 Plus | Solar Open 2 |
|----------|----------|----------|
| Creator | Alibaba | Upstage |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1M |
| Independent public score (not head-to-head) | 49.89 | null |
| Benchmarks Covered | 4 | 11 |
| Pricing (input/output) | $0.40 / $2.40 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Qwen3.5 Plus public-lane score: 48 (Estimated · #66/152)
- Solar Open 2 public-lane score: Coming soon

| Benchmark | Qwen3.5 Plus | Solar Open 2 | Winner |
|-----------|-----------|-----------|--------|
| JobBench | 18.5% | Coming soon | Coming soon |
| terminalBenchHard | Coming soon | 28.3% | Coming soon |
| APEX-Agents | Coming soon | 16.6% | Coming soon |
| MCP Atlas | Coming soon | 58.2% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Qwen3.5 Plus public-lane score: Coming soon
- Solar Open 2 public-lane score: Coming soon

| Benchmark | Qwen3.5 Plus | Solar Open 2 | Winner |
|-----------|-----------|-----------|--------|
| Vibe Code Bench | 15.74% | Coming soon | Coming soon |
| LiveCodeBench v6 | Coming soon | 92.4% | Coming soon |
| SWE-bench Verified | Coming soon | 70.4% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Qwen3.5 Plus public-lane score: Coming soon
- Solar Open 2 public-lane score: Coming soon

| Benchmark | Qwen3.5 Plus | Solar Open 2 | Winner |
|-----------|-----------|-----------|--------|
| MMLU-Pro | Coming soon | 86.2% | Coming soon |
| GPQA-D | Coming soon | 86.3% | Coming soon |
| HLE w/o tools | Coming soon | 28.8% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Qwen3.5 Plus public-lane score: Coming soon
- Solar Open 2 public-lane score: Coming soon

| Benchmark | Qwen3.5 Plus | Solar Open 2 | Winner |
|-----------|-----------|-----------|--------|
| IFBench | Coming soon | 80% | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- Qwen3.5 Plus public-lane score: 39.5 (Unranked · 2 rankable rows)
- Solar Open 2 public-lane score: Coming soon

| Benchmark | Qwen3.5 Plus | Solar Open 2 | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 21.034% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 2.083% | Coming soon | Coming soon |
| HMMT Feb 2026 | Coming soon | 93.9% | Coming soon |
| AIME26 | Coming soon | 95.7% | Coming soon |

## FAQ

### Can I compare Qwen3.5 Plus and Solar Open 2 on BenchLM yet?

Not fully yet. BenchLM is tracking both models, but sourced benchmark coverage is still incomplete for a fair score-level comparison.

### Why does this page show "coming soon" values?

BenchLM only calls winners when public benchmark coverage is available on both sides of the comparison.

## Related Comparisons

- [Qwen3.5 Plus vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-qwen3-5-plus)
- [Solar Open 2 vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-solar-open-2)
- [Qwen3.5 Plus vs GPT-6 Astra](/compare/gpt-6-astra-vs-qwen3-5-plus)
- [Solar Open 2 vs GPT-6 Astra](/compare/gpt-6-astra-vs-solar-open-2)

## Explore More

- [Qwen3.5 Plus profile](/models/qwen3-5-plus)
- [Solar Open 2 profile](/models/solar-open-2)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)