gpt-oss-20b is 18.8× cheaper per million tokens (blended). Seed 2.1 Turbo has the larger context window (262,144 vs 131,072 tokens, 2.0×). gpt-oss-20b is open-weights; the other is not.
Seed 2.1 Turbo vs gpt-oss-20b
Live catalog fields. Best-in-row is highlighted.
Seed 2.1 Turbo
Bytedance Seed · bytedance-seed__seed-2-1-turbo
gpt-oss-20bopen
OpenAI · openai__gpt-oss-20b
Identity
| Field | bytedance-seed__seed-2-1-turbo | openai__gpt-oss-20b |
|---|---|---|
| Provider | Bytedance Seed | OpenAI |
| Slug | bytedance-seed__seed-2-1-turbo | openai__gpt-oss-20b |
| Status | live | live |
| Open weights | No | Yes |
| License | — | — |
| HuggingFace | — | openai/gpt-oss-20b |
Quality
| Field | bytedance-seed__seed-2-1-turbo | openai__gpt-oss-20b |
|---|---|---|
| Quality index (0–100) | — | — |
Cost
| Field | bytedance-seed__seed-2-1-turbo | openai__gpt-oss-20b |
|---|---|---|
| Input $ / 1M tokens | $0.50 | $0.03 |
| Cached input $ / 1M | — | $0.03 |
| Output $ / 1M tokens | $2.50 | $0.13 |
Context
| Field | bytedance-seed__seed-2-1-turbo | openai__gpt-oss-20b |
|---|---|---|
| Max context tokens | 262,144 | 131,072 |
| Max output tokens | 235,929 | 117,964 |
Modalities
| Field | bytedance-seed__seed-2-1-turbo | openai__gpt-oss-20b |
|---|---|---|
| Input | text, image, video | text |
| Output | text | text |