# Seed 2.1 Turbo vs SWE-2 Flash

> Side-by-side benchmark comparison for Seed 2.1 Turbo and SWE-2 Flash across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/seed-2-1-turbo-vs-swe-2-flash
- Last updated: November 5, 2026

- Shared sourced benchmarks: 2
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Evidence is too thin for a benchmark verdict: Seed 2.1 Turbo and SWE-2 Flash 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.
- SWE-2 Flash has the larger published context window at 1M.

## Model Snapshot

| Property | Seed 2.1 Turbo | SWE-2 Flash |
|----------|----------|----------|
| Creator | ByteDance | Cognition |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 256K | 1M |
| Independent public score (not head-to-head) | null | null |
| Benchmarks Covered | 11 | 7 |
| Pricing (input/output) | Pricing unavailable / Pricing unavailable | Pricing unavailable / Pricing unavailable |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Seed 2.1 Turbo public-lane score: Coming soon
- SWE-2 Flash public-lane score: Coming soon

| Benchmark | Seed 2.1 Turbo | SWE-2 Flash | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 67.6% | 89.2% | SWE-2 Flash |
| Terminal-Bench 4.0 | Coming soon | 20.00% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Seed 2.1 Turbo public-lane score: Coming soon
- SWE-2 Flash public-lane score: Coming soon

| Benchmark | Seed 2.1 Turbo | SWE-2 Flash | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 67.6% | 89.2% | SWE-2 Flash |
| NL2Repo | 43.7% | Coming soon | Coming soon |
| FrontierCode 1.1 Main | Coming soon | 45.5% | Coming soon |
| DeepSWE | Coming soon | 60.1% | Coming soon |
| SWE-Atlas Codebase QnA | Coming soon | 50.0% | Coming soon |
| FrontierCode 2.0 | Coming soon | 24.0% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Seed 2.1 Turbo public-lane score: Coming soon
- SWE-2 Flash public-lane score: Coming soon

| Benchmark | Seed 2.1 Turbo | SWE-2 Flash | Winner |
|-----------|-----------|-----------|--------|
| MathVision | 90.1% | Coming soon | Coming soon |
| MMMU-Pro | 80.1% | Coming soon | Coming soon |
| ZeroBench | 11.0% | Coming soon | Coming soon |
| BabyVision | 62.9% | Coming soon | Coming soon |
| CharXiv | 82.5% | Coming soon | Coming soon |
| ERQA | 71.3% | Coming soon | Coming soon |
| Video-MME | 89.0% | Coming soon | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Seed 2.1 Turbo public-lane score: Coming soon
- SWE-2 Flash public-lane score: Coming soon

| Benchmark | Seed 2.1 Turbo | SWE-2 Flash | Winner |
|-----------|-----------|-----------|--------|
| SuperGPQA | 67.4% | Coming soon | Coming soon |

## FAQ

### Is there enough evidence to pick between Seed 2.1 Turbo and SWE-2 Flash?

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

- [Seed 2.1 Turbo vs Seed 2.1 Pro](/compare/seed-2-1-pro-vs-seed-2-1-turbo)
- [SWE-2 Flash vs Seed 2.1 Pro](/compare/seed-2-1-pro-vs-swe-2-flash)
- [Seed 2.1 Turbo vs SWE-1.7](/compare/seed-2-1-turbo-vs-swe-1-7)
- [SWE-2 Flash vs SWE-1.7](/compare/swe-1-7-vs-swe-2-flash)

## Explore More

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