GLM-5.3 Flash vs Seed 2.1 Turbo: Specs & Benchmark Comparison
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| Characteristic | GLM-5.3 Flash | Seed 2.1 Turbo |
|---|---|---|
| Company | Zhipu AI | ByteDance |
| Release Date | August 26, 2026 | June 24, 2026 |
| Parameters | 320B | — |
| Multimodal | Yes | Yes |
| Context (input) | 1.0M | — |
| Context (output) | 131K | — |
| Input Price / 1M | $0.15 | — |
| Output Price / 1M | $0.50 | — |
| Average Score | 0.6 | 0.6 |
| Benchmarks | ||
| Toolathlon Verified | 0.8 | 0.5 |
| Terminal-Bench 2.1 | 0.8 | 0.7 |
Visual Benchmark Comparison
GLM-5.3 Flash
Seed 2.1 Turbo
Toolathlon Verified0.8 vs 0.5
0.8
0.5
Terminal-Bench 2.10.8 vs 0.7
0.8
0.7
Verdict
GLM-5.3 Flash leads in 1 out of 2 comparison categories.
Overall Performance
Both models show comparable average scores: GLM-5.3 Flash — 0.6, Seed 2.1 Turbo — 0.6.
Recency
GLM-5.3 Flash is newer: released 8/26/2026 vs 6/24/2026.
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Frequently Asked Questions
Which is better for coding — GLM-5.3 Flash or Seed 2.1 Turbo?
Direct comparison on the SWE-Bench benchmark is not available. We recommend reviewing other metrics on the comparison page.
Which model is cheaper — GLM-5.3 Flash or Seed 2.1 Turbo?
API pricing data is available on the individual model pages.
Which has a larger context window — GLM-5.3 Flash or Seed 2.1 Turbo?
Context window data is available on the individual model pages.
The GLM-5.3 Flash and Seed 2.1 Turbo comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the GLM-5.3 Flash or Seed 2.1 Turbo page. See also the complete list of AI model comparisons.