GLM-5.2 vs Seed 2.1 Turbo: Specs & Benchmark Comparison
GLM-5.2 is developed by Zhipu AI, while Seed 2.1 Turbo comes from ByteDance. Both were released in June 2026. GLM-5.2 has a published size of about 753 billion parameters; ByteDance has not disclosed the parameter count of Seed 2.1 Turbo.
We have 4 benchmark results for GLM-5.2 and 90 benchmark results for Seed 2.1 Turbo, but they were measured on different benchmarks, so there is no like-for-like scoreboard.
GLM-5.2 is available through an API at $1.40 per million input tokens with a 1M-token context window. We do not track a hosted API for Seed 2.1 Turbo, so pricing and context cannot be compared directly.
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| Characteristic | GLM-5.2 | Seed 2.1 Turbo |
|---|---|---|
| Company | Zhipu AI | ByteDance |
| Release Date | June 16, 2026 | June 24, 2026 |
| Parameters | 753B | — |
| Multimodal | No | Yes |
| Context (input) | 1.0M | — |
| Context (output) | 131K | — |
| Input Price / 1M | $1.40 | — |
| Output Price / 1M | $4.40 | — |
| Average Score | 94.3% | 61.0% |
Verdict
Both models show equal results — the choice depends on your specific use case.
Both models show comparable average scores: GLM-5.2 — 0.9, Seed 2.1 Turbo — 0.6.
Both models were released around the same time: 6/16/2026 and 6/24/2026.
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Frequently Asked Questions
Which is better for coding — GLM-5.2 or Seed 2.1 Turbo?
Which model is cheaper — GLM-5.2 or Seed 2.1 Turbo?
Which has a larger context window — GLM-5.2 or Seed 2.1 Turbo?
The GLM-5.2 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-5.2 or Seed 2.1 Turbo page. See also the complete list of AI model comparisons.