Grok 4.5 vs Seed 2.1 Pro: Specs & Benchmark Comparison
Grok 4.5 is developed by xAI, while Seed 2.1 Pro comes from ByteDance. Seed 2.1 Pro was released in June 2026, and Grok 4.5 followed a month later in July 2026.
The two models share 3 published benchmarks. Grok 4.5 leads on 3 of them. The widest gaps are on DeepSWE, where Grok 4.5 scores 53.0% against 32.7%; Terminal-Bench 2.1, where Grok 4.5 scores 83.0% against 71.0%. Averaged across everything we track, Grok 4.5 sits at 52.9% and Seed 2.1 Pro at 63.7%.
Grok 4.5 is available through an API at $2 per million input tokens with a 500K-token context window. We do not track a hosted API for Seed 2.1 Pro, so pricing and context cannot be compared directly.
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| Characteristic | Grok 4.5 | Seed 2.1 Pro |
|---|---|---|
| Company | xAI | ByteDance |
| Release Date | July 16, 2026 | June 24, 2026 |
| Parameters | — | — |
| Multimodal | Yes | Yes |
| Context (input) | 500K | — |
| Input Price / 1M | $2.00 | — |
| Output Price / 1M | $6.00 | — |
| Average Score | 52.9% | 63.7% |
| Benchmarks | ||
| DeepSWE | 53.0% | 32.7% |
| Terminal-Bench 2.1 | 83.0% | 71.0% |
| SWE-Bench Pro | 65.0% | 57.5% |
Visual Benchmark Comparison
Verdict
Grok 4.5 leads in 1 out of 2 comparison categories.
Both models show comparable average scores: Grok 4.5 — 0.5, Seed 2.1 Pro — 0.6.
Grok 4.5 is newer: released 7/16/2026 vs 6/24/2026.
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Frequently Asked Questions
Which is better for coding — Grok 4.5 or Seed 2.1 Pro?
Which model is cheaper — Grok 4.5 or Seed 2.1 Pro?
Which has a larger context window — Grok 4.5 or Seed 2.1 Pro?
The Grok 4.5 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 Grok 4.5 or Seed 2.1 Pro page. See also the complete list of AI model comparisons.