GPT-5.5 vs Seed 2.0 Lite
Compare GPT-5.5 by OpenAI against Seed 2.0 Lite by ByteDance, context windows of 1.1M vs 262K, tested across 53 shared challenges.
Our Verdict
GPT-5.5
Seed 2.0 LiteRunner-up
No community votes yet. On paper, GPT-5.5 has the edge — bigger model tier, newer, bigger context window, major provider backing.
Seed 2.0 Lite is 15x cheaper per token — worth considering if cost matters.
Slight edge
API pricing
Cost per 1M tokens
GPT-5.5
Input
$5.00
Output
$30.00
Seed 2.0 Lite
Input
$0.25
20× cheaper
Output
$2.00
15× cheaper
Seed 2.0 Lite is cheaper on both — 20× input, 15× output
Writing DNA
Style Comparison
Similarity
53%
GPT-5.5 uses 3.2x more bold
GPT-5.5
Seed 2.0 Lite
58%Vocabulary53%
18wSentence Length31w
0.74Hedging0.28
2.9Bold0.9
5.1Lists1.7
0.00Emoji0.00
1.68Headings1.27
0.03Transitions0.05
Based on 26 + 23 text responses
Research
What we learned reading every model
FAQ
