# Qwen3.5-122B-A10B vs Seed 2.1 Pro

> Side-by-side benchmark comparison for Qwen3.5-122B-A10B and Seed 2.1 Pro across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/qwen3-5-122b-a10b-vs-seed-2-1-pro
- Last updated: September 10, 2026

- Shared sourced benchmarks: 3
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Evidence is too thin for a benchmark verdict: Qwen3.5-122B-A10B and Seed 2.1 Pro share only 3 sourced benchmark rows.

## Summary

- Only 3 shared sourced benchmark rows are available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- Seed 2.1 Pro has the lower published output-token price.
- Qwen3.5-122B-A10B has the larger published context window at 262K.

## Model Snapshot

| Property | Qwen3.5-122B-A10B | Seed 2.1 Pro |
|----------|----------|----------|
| Creator | Alibaba | ByteDance |
| Type | Open Weight | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 262K | 256K |
| Independent public score (not head-to-head) | 56.37 | null |
| Benchmarks Covered | 15 | 11 |
| Pricing (input/output) | $0.00 / $0.00 | Pricing unavailable / Pricing unavailable |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Qwen3.5-122B-A10B public-lane score: 43.6 (Estimated · #94/152)
- Seed 2.1 Pro public-lane score: Coming soon

| Benchmark | Qwen3.5-122B-A10B | Seed 2.1 Pro | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 49.4% | Coming soon | Coming soon |
| BrowseComp | 63.8% | Coming soon | Coming soon |
| OSWorld-Verified | 58% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 71.0% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Qwen3.5-122B-A10B public-lane score: 43.6 (Supported · #98/151)
- Seed 2.1 Pro public-lane score: Coming soon

| Benchmark | Qwen3.5-122B-A10B | Seed 2.1 Pro | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 72% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 71.0% | Coming soon |
| NL2Repo | Coming soon | 47% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Qwen3.5-122B-A10B public-lane score: 57 (#32/48)
- Seed 2.1 Pro public-lane score: Coming soon

| Benchmark | Qwen3.5-122B-A10B | Seed 2.1 Pro | Winner |
|-----------|-----------|-----------|--------|
| MMMU | 83.9% | Coming soon | Coming soon |
| MMVU | 74.7% | Coming soon | Coming soon |
| MathVision | 86.2% | 92.6% | Seed 2.1 Pro |
| CharXiv | 77.2% | 85.4% | Seed 2.1 Pro |
| V* | 93.2% | Coming soon | Coming soon |
| MMMU-Pro | Coming soon | 81.6% | Coming soon |
| ZeroBench | Coming soon | 18.0% | Coming soon |
| BabyVision | Coming soon | 73.7% | Coming soon |
| ERQA | Coming soon | 72.0% | Coming soon |
| Video-MME | Coming soon | 89.2% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Qwen3.5-122B-A10B public-lane score: 48.7 (Unranked · 3 rankable rows)
- Seed 2.1 Pro public-lane score: Coming soon

| Benchmark | Qwen3.5-122B-A10B | Seed 2.1 Pro | Winner |
|-----------|-----------|-----------|--------|
| LongBench v2 | 60.2% | Coming soon | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Qwen3.5-122B-A10B public-lane score: 49 (Supported · #86/183)
- Seed 2.1 Pro public-lane score: Coming soon

| Benchmark | Qwen3.5-122B-A10B | Seed 2.1 Pro | Winner |
|-----------|-----------|-----------|--------|
| MMLU-Pro | 86.7% | Coming soon | Coming soon |
| SuperGPQA | 67.1% | 70.8% | Seed 2.1 Pro |
| GPQA | 86.6% | Coming soon | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Qwen3.5-122B-A10B public-lane score: 93 (#11/123)
- Seed 2.1 Pro public-lane score: Coming soon

| Benchmark | Qwen3.5-122B-A10B | Seed 2.1 Pro | Winner |
|-----------|-----------|-----------|--------|
| IFEval | 93.4% | Coming soon | Coming soon |

### Multilingual

- Winner: Insufficient shared evidence
- Qwen3.5-122B-A10B public-lane score: 36.8 (#10/12)
- Seed 2.1 Pro public-lane score: Coming soon

| Benchmark | Qwen3.5-122B-A10B | Seed 2.1 Pro | Winner |
|-----------|-----------|-----------|--------|
| MMLU-ProX | 82.2% | Coming soon | Coming soon |

## FAQ

### Is there enough evidence to pick between Qwen3.5-122B-A10B and Seed 2.1 Pro?

Not yet. The models share only 3 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

- [Qwen3.5-122B-A10B vs Seed 2.1 Turbo](/compare/qwen3-5-122b-a10b-vs-seed-2-1-turbo)
- [Seed 2.1 Pro vs Seed 2.1 Turbo](/compare/seed-2-1-pro-vs-seed-2-1-turbo)
- [Qwen3.5-122B-A10B vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-qwen3-5-122b-a10b)
- [Seed 2.1 Pro vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-seed-2-1-pro)

## Explore More

- [Qwen3.5-122B-A10B profile](/models/qwen3-5-122b-a10b)
- [Seed 2.1 Pro profile](/models/seed-2-1-pro)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)