gpt-oss-20b is 56.3× cheaper per million tokens (blended). gpt-oss-20b has the larger context window (131,072 vs 65,536 tokens, 2.0×). gpt-oss-20b is open-weights; the other is not.
Nano Banana 2.1 vs gpt-oss-20b
Live catalog fields. Best-in-row is highlighted.
Nano Banana 2.1
Google · google__gemini-nano-banana-2.1
gpt-oss-20bopen
OpenAI · openai__gpt-oss-20b
Identity
| Field | google__gemini-nano-banana-2.1 | openai__gpt-oss-20b |
|---|---|---|
| Provider | OpenAI | |
| Slug | google__gemini-nano-banana-2.1 | openai__gpt-oss-20b |
| Status | live | live |
| Open weights | No | Yes |
| License | — | — |
| HuggingFace | — | openai/gpt-oss-20b |
Quality
| Field | google__gemini-nano-banana-2.1 | openai__gpt-oss-20b |
|---|---|---|
| Quality index (0–100) | — | — |
Cost
| Field | google__gemini-nano-banana-2.1 | openai__gpt-oss-20b |
|---|---|---|
| Input $ / 1M tokens | $1.50 | $0.03 |
| Cached input $ / 1M | — | $0.03 |
| Output $ / 1M tokens | $7.50 | $0.13 |
Context
| Field | google__gemini-nano-banana-2.1 | openai__gpt-oss-20b |
|---|---|---|
| Max context tokens | 65,536 | 131,072 |
| Max output tokens | 58,982 | 117,964 |
Modalities
| Field | google__gemini-nano-banana-2.1 | openai__gpt-oss-20b |
|---|---|---|
| Input | image, text | text |
| Output | image, text | text |