Qwen3.8 Flash Next vs Seed 2.1 Pro: Specs & Benchmark Comparison
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| Characteristic | Qwen3.8 Flash Next | Seed 2.1 Pro |
|---|---|---|
| Company | Alibaba | ByteDance |
| Release Date | August 26, 2026 | June 24, 2026 |
| Parameters | 180B | — |
| Multimodal | Yes | Yes |
| Context (input) | 1.0M | — |
| Context (output) | 66K | — |
| Input Price / 1M | $0.16 | — |
| Output Price / 1M | $0.47 | — |
| Average Score | 0.7 | 0.6 |
| Benchmarks | ||
| Toolathlon Verified | 0.7 | 0.5 |
| Agents' Last Exam | 0.5 | 0.4 |
| SWE-bench Pro | 0.6 | 0.6 |
Visual Benchmark Comparison
Qwen3.8 Flash Next
Seed 2.1 Pro
Toolathlon Verified0.7 vs 0.5
0.7
0.5
Agents' Last Exam0.5 vs 0.4
0.5
0.4
SWE-bench Pro0.6 vs 0.6
0.6
0.6
Verdict
Qwen3.8 Flash Next leads in 1 out of 2 comparison categories.
Overall Performance
Both models show comparable average scores: Qwen3.8 Flash Next — 0.7, Seed 2.1 Pro — 0.6.
Recency
Qwen3.8 Flash Next is newer: released 8/26/2026 vs 6/24/2026.
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Frequently Asked Questions
Which is better for coding — Qwen3.8 Flash Next or Seed 2.1 Pro?
Direct comparison on the SWE-Bench benchmark is not available. We recommend reviewing other metrics on the comparison page.
Which model is cheaper — Qwen3.8 Flash Next or Seed 2.1 Pro?
API pricing data is available on the individual model pages.
Which has a larger context window — Qwen3.8 Flash Next or Seed 2.1 Pro?
Context window data is available on the individual model pages.
The Qwen3.8 Flash Next and Seed 2.1 Pro comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the Qwen3.8 Flash Next or Seed 2.1 Pro page. See also the complete list of AI model comparisons.