# Qwen3.8-Flash-Next vs Seed 2.1 Turbo

> Side-by-side benchmark comparison for Qwen3.8-Flash-Next and Seed 2.1 Turbo across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/qwen3-8-flash-next-vs-seed-2-1-turbo
- Last updated: September 10, 2026

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

## Quick Verdict

Pick Qwen3.8-Flash-Next if you want the stronger benchmark profile. Seed 2.1 Turbo only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Qwen3.8-Flash-Next leads overall 56.84 to 0.
- The biggest single benchmark swing is CharXiv in Multimodal & Grounded, with scores of 90.6% and 82.5%.
- Seed 2.1 Turbo is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Qwen3.8-Flash-Next also has the larger context window at 262K.

## Model Snapshot

| Property | Qwen3.8-Flash-Next | Seed 2.1 Turbo |
|----------|----------|----------|
| Creator | Alibaba | ByteDance |
| Type | Open Weight | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 262K | 256K |
| Overall Score | 56.84 | null |
| Benchmarks Covered | 24 | 11 |
| Pricing (input/output) | $0.00 / $0.00 | Pricing unavailable / Pricing unavailable |

## Category Breakdown

### Agentic

- Winner: Coming soon
- Qwen3.8-Flash-Next public-lane score: 58.5 (Estimated · #27/152)
- Seed 2.1 Turbo public-lane score: Coming soon

| Benchmark | Qwen3.8-Flash-Next | Seed 2.1 Turbo | Winner |
|-----------|-----------|-----------|--------|
| CoWorkBench | 73.9% | Coming soon | Coming soon |
| JobBench | 55.7% | Coming soon | Coming soon |
| Agents' Last Exam | 51.2% | Coming soon | Coming soon |
| Toolathlon-Verified | 73.5% | Coming soon | Coming soon |
| AndroidWorld | 84.5% | Coming soon | Coming soon |
| OSWorld 2.0 | 19.4% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 67.6% | Coming soon |

### Coding

- Winner: Coming soon
- Qwen3.8-Flash-Next public-lane score: 57.9 (Supported · #30/151)
- Seed 2.1 Turbo public-lane score: Coming soon

| Benchmark | Qwen3.8-Flash-Next | Seed 2.1 Turbo | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Pro | 62.5% | Coming soon | Coming soon |
| SWE Multilingual | 81% | Coming soon | Coming soon |
| NL2Repo | 48.1% | 43.7% | Qwen3.8-Flash-Next |
| DeepSWE | 58.7% | Coming soon | Coming soon |
| LiveCodeBench v6 | 91.9% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 67.6% | Coming soon |

### Multimodal & Grounded

- Winner: Coming soon
- Qwen3.8-Flash-Next public-lane score: 83.3 (#7/48)
- Seed 2.1 Turbo public-lane score: Coming soon

| Benchmark | Qwen3.8-Flash-Next | Seed 2.1 Turbo | Winner |
|-----------|-----------|-----------|--------|
| Vision2Web | 64.0% | Coming soon | Coming soon |
| ERQA | 72.3% | 71.3% | Qwen3.8-Flash-Next |
| LVBench | 76.6% | Coming soon | Coming soon |
| RealWorldQA | 88.5% | Coming soon | Coming soon |
| MathVision | 90.6% | 90.1% | Qwen3.8-Flash-Next |
| MathVision w/ Python | 95.7% | Coming soon | Coming soon |
| CharXiv w/o tools | 84.6% | Coming soon | Coming soon |
| CharXiv | 90.6% | 82.5% | Qwen3.8-Flash-Next |
| MMMU-Pro | Coming soon | 80.1% | Coming soon |
| ZeroBench | Coming soon | 11.0% | Coming soon |
| BabyVision | Coming soon | 62.9% | Coming soon |
| Video-MME | Coming soon | 89.0% | Coming soon |

### Reasoning

- Winner: Coming soon
- Qwen3.8-Flash-Next public-lane score: 75.8 (Unranked · 2 rankable rows)
- Seed 2.1 Turbo public-lane score: Coming soon

### Knowledge

- Winner: Coming soon
- Qwen3.8-Flash-Next public-lane score: 55.5 (Supported · #53/183)
- Seed 2.1 Turbo public-lane score: Coming soon

| Benchmark | Qwen3.8-Flash-Next | Seed 2.1 Turbo | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 91.7% | Coming soon | Coming soon |
| GPQA-D | 91.7% | Coming soon | Coming soon |
| HLE | 35.9% | Coming soon | Coming soon |
| HLE w/o tools | 35.9% | Coming soon | Coming soon |
| SuperGPQA | Coming soon | 67.4% | Coming soon |

### Instruction Following

- Winner: Coming soon
- Qwen3.8-Flash-Next public-lane score: 88 (#32/123)
- Seed 2.1 Turbo public-lane score: Coming soon

| Benchmark | Qwen3.8-Flash-Next | Seed 2.1 Turbo | Winner |
|-----------|-----------|-----------|--------|
| IFBench | 81.3% | Coming soon | Coming soon |

## FAQ

### Which is better overall, Qwen3.8-Flash-Next or Seed 2.1 Turbo?

Qwen3.8-Flash-Next is ahead overall on BenchLM right now.

### How many benchmarks does Qwen3.8-Flash-Next cover on BenchLM?

Qwen3.8-Flash-Next currently has 24 sourced benchmark scores on BenchLM.

### How many benchmarks does Seed 2.1 Turbo cover on BenchLM?

Seed 2.1 Turbo currently has 11 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Qwen3.8-Flash-Next vs Seed 2.1 Pro](/compare/qwen3-8-flash-next-vs-seed-2-1-pro)
- [Seed 2.1 Turbo vs Seed 2.1 Pro](/compare/seed-2-1-pro-vs-seed-2-1-turbo)
- [Qwen3.8-Flash-Next vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-qwen3-8-flash-next)
- [Seed 2.1 Turbo vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-seed-2-1-turbo)

## Explore More

- [Qwen3.8-Flash-Next profile](/models/qwen3-8-flash-next)
- [Seed 2.1 Turbo profile](/models/seed-2-1-turbo)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)