GPT-5.1 High vs Seed 2.1 Pro: Specs & Benchmark Comparison
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| Characteristic | GPT-5.1 High | Seed 2.1 Pro |
|---|---|---|
| Company | OpenAI | ByteDance |
| Release Date | November 11, 2025 | June 24, 2026 |
| Parameters | — | — |
| Multimodal | Yes | Yes |
| Context (input) | 256K | — |
| Context (output) | 128K | — |
| Input Price / 1M | $2.00 | — |
| Output Price / 1M | $8.00 | — |
| Average Score | 0.9 | 0.6 |
Verdict
Seed 2.1 Pro leads in 1 out of 2 comparison categories.
Overall Performance
Both models show comparable average scores: GPT-5.1 High — 0.9, Seed 2.1 Pro — 0.6.
Recency
Seed 2.1 Pro is newer: released 6/24/2026 vs 11/11/2025.
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Frequently Asked Questions
Which is better for coding — GPT-5.1 High 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 — GPT-5.1 High or Seed 2.1 Pro?
API pricing data is available on the individual model pages.
Which has a larger context window — GPT-5.1 High or Seed 2.1 Pro?
Context window data is available on the individual model pages.
The GPT-5.1 High 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 GPT-5.1 High or Seed 2.1 Pro page. See also the complete list of AI model comparisons.