GPT-5.1-CodexvsSeed 2.0 Code
Seed 2.0 Code is cheaper than GPT-5.1-Codex at $0.5/M vs $1.25/M input tokens.
| Spec | GPT-5.1-Codex | Seed 2.0 Code |
|---|---|---|
| Input price | $1.25/M tokens | $0.5/M tokens |
| Output price | $10/M tokens | $3/M tokens |
| Context window | 400K tokens | 262K tokens |
| Released | Nov 2025 | Aug 2026 |
Our Verdict
GPT-5.1-Codex
Seed 2.0 CodeRunner-up
Not enough votes to call it. On the specs, GPT-5.1-Codex has the edge: bigger model tier, bigger context window, major provider backing.
Seed 2.0 Code costs 3.3x less per token.
Too close to call
API pricing
Cost per 1M tokens
GPT-5.1-Codex
Input
$1.25
Output
$10.00
Seed 2.0 Code
Input
$0.50
2.5× cheaper
Output
$3.00
3.3× cheaper
Seed 2.0 Code is cheaper on both — 2.5× input, 3.3× output
Writing DNA
Style Comparison
Similarity
36%
GPT-5.1-Codex uses 13.9x more transitions
GPT-5.1-Codex
Seed 2.0 Code
70%Vocabulary56%
17wSentence Length33w
0.39Hedging0.24
3.4Bold3.1
3.5Lists3.0
0.00Emoji0.00
0.50Headings1.66
0.38Transitions0.03
Based on 14 + 27 text responses
Research
What we learned reading every model
FAQ
Common questions
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