gpt-oss-20b is 3.5× cheaper per million tokens (blended). Seed 1.6 Flash has the larger context window (262,144 vs 131,072 tokens, 2.0×). gpt-oss-20b is open-weights; the other is not.
Seed 1.6 Flash vs gpt-oss-20b
Live catalog fields. Best-in-row is highlighted.
Seed 1.6 Flash
Bytedance Seed · bytedance-seed__seed-1.6-flash
gpt-oss-20bopen
OpenAI · openai__gpt-oss-20b
Identity
| Field | bytedance-seed__seed-1.6-flash | openai__gpt-oss-20b |
|---|---|---|
| Provider | Bytedance Seed | OpenAI |
| Slug | bytedance-seed__seed-1.6-flash | openai__gpt-oss-20b |
| Status | live | live |
| Open weights | No | Yes |
| License | — | — |
| HuggingFace | — | openai/gpt-oss-20b |
Quality
| Field | bytedance-seed__seed-1.6-flash | openai__gpt-oss-20b |
|---|---|---|
| Quality index (0–100) | — | — |
Cost
| Field | bytedance-seed__seed-1.6-flash | openai__gpt-oss-20b |
|---|---|---|
| Input $ / 1M tokens | $0.07 | $0.02 |
| Cached input $ / 1M | — | $0.01 |
| Output $ / 1M tokens | $0.30 | $0.09 |
Context
| Field | bytedance-seed__seed-1.6-flash | openai__gpt-oss-20b |
|---|---|---|
| Max context tokens | 262,144 | 131,072 |
| Max output tokens | 32,768 | 32,768 |
Modalities
| Field | bytedance-seed__seed-1.6-flash | openai__gpt-oss-20b |
|---|---|---|
| Input | image, text, video | text |
| Output | text | text |