GPT-5.1 vs Seed-OSS-36B-Instruct
OpenAI vs ByteDance — benchmarks, pricing, and capabilities side by side.
- •GPT-5.1 has the higher intelligence index (89 vs 78.8)
- •Seed-OSS-36B-Instruct is cheaper ($0.20 vs $1.25 per 1M input)
- •GPT-5.1 is faster
| GPT-5.1 | Seed-OSS-36B-Instruct | |
|---|---|---|
| Intelligence index | 89 | 78.8 |
| Developer | OpenAI | ByteDance |
| Type | LLM | LLM |
| Access | API only | — |
| Context window | 400,000 tokens | — |
| Input price | $1.25 / 1M | $0.20 / 1M |
| Output price | $10.00 / 1M | $0.60 / 1M |
| Speed | 115 tok/s | 37 tok/s |
| Released | November 12, 2025 | August 20, 2025 |
| Parameters | — | — |
| Input modalities | Text, Image | — |
| Output modalities | Text | — |
Shared benchmarks
GPT-5.1
Seed-OSS-36B-Instruct
AIME 2025
94
84.7
GPQA Diamond
88.1
72.6
Humanity’s Last Exam
26.5
9.1
LiveCodeBench
86.8
76.5
MMLU-Pro
87
81.5