Claude Opus 5 vs Seed 2.1 Pro: Specs & Benchmark Comparison
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| Characteristic | Claude Opus 5 | Seed 2.1 Pro |
|---|---|---|
| Company | Anthropic | ByteDance |
| Release Date | July 24, 2026 | June 24, 2026 |
| Parameters | — | — |
| Multimodal | Yes | Yes |
| Context (input) | 1.0M | — |
| Context (output) | 128K | — |
| Input Price / 1M | $5.00 | — |
| Output Price / 1M | $25.00 | — |
| Average Score | 0.6 | 0.6 |
| Benchmarks | ||
| Humanity's Last Exam | 0.6 | 0.6 |
| BrowseComp | 0.9 | 0.9 |
Visual Benchmark Comparison
Claude Opus 5
Seed 2.1 Pro
Humanity's Last Exam0.6 vs 0.6
0.6
0.6
BrowseComp0.9 vs 0.9
0.9
0.9
Verdict
Claude Opus 5 leads in 1 out of 2 comparison categories.
Overall Performance
Both models show comparable average scores: Claude Opus 5 — 0.6, Seed 2.1 Pro — 0.6.
Recency
Claude Opus 5 is newer: released 7/24/2026 vs 6/24/2026.
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Frequently Asked Questions
Which is better for coding — Claude Opus 5 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 — Claude Opus 5 or Seed 2.1 Pro?
API pricing data is available on the individual model pages.
Which has a larger context window — Claude Opus 5 or Seed 2.1 Pro?
Context window data is available on the individual model pages.
The Claude Opus 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 Claude Opus 5 or Seed 2.1 Pro page. See also the complete list of AI model comparisons.