Seed 1.8 vs Seed 2.1 Pro Preview
22 SHARED BENCHMARKSAcross 22 shared benchmarks, Seed 1.8 scores higher on 0 and Seed 2.1 Pro Preview on 22. The widest gap is ZeroBench, where Seed 2.1 Pro Preview scores 18 against 11.
BYTEDANCEVSBYTEDANCE22 SHARED0–22 HEAD-TO-HEADNEWEST SCORE ADDED
At a glance
MakerByteDanceByteDance
Released——
Price per 1M tokens input / output$0.25 / $2.00—
Cost of 1M in + 1M out$2.25—
Head-to-head of 22 shared benchmarks0 wins22 wins
Scores tracked independently verified40 0 ◆66 1 ◆
Prices: deepinfra for Seed 1.8. ◆ = independently verified score.
Where each leadsby capability area · benchmark wins
AreaSeed 1.8WINSSeed 2.1 Pro Preview
Biggest gaps
Seed 1.8 pulls furthest ahead on
No ratified-area lead of 3 points or more.
Seed 2.1 Pro Preview pulls furthest ahead on
- BrowseComp86.2 vs 67.6
- OSWorld-Verified78.8 vs 61.9
- CharXiv (RQ)86.4 vs 71.4
Every shared benchmark22 · grouped by area
Agentic 2
Multimodal 4
Other shared benchmarks 16
Each score is the one the model's own page shows — the most authoritative tracked result for that benchmark, on the benchmark's standard methodology (source-attributed). ↓ marks lower-is-better metrics; ◆ an independently verified score. Open either model for its full surface, provenance and pricing.