gpt-oss-20b vs deepseek-v4-flash-0731-spark
Specs, VRAM requirements and download trends — updated 25 October 2026.
openai · A · Open weights
Params
21.5 B
Context
131,072
30d
5.8 M
apache-2.0 · commercial OK
0xSero · B · Open weights
Params
60.3 B
Context
1,048,576
30d
171 K
mit · commercial OK
Specification comparison
Differences are highlighted; identical values are muted.
| Specification | gpt-oss-20b | deepseek-v4-flash-0731-spark |
|---|---|---|
| Deployment | Open weights · also via API | Open weights |
| Parameters | 21.5 B | 60.3 B |
| Architecture | GptOssForCausalLM | DeepseekV4ForCausalLM |
| Context length | 131,072 | 1,048,576 |
| Licence | apache-2.0 | mit |
| Commercial use | Allowed | Allowed |
| Languages | — | — |
| Downloads 30d | 5,764,154 | 171,151 |
| Downloads all time | 105.3 M | 386 K |
| Quantizations on the Hub | SAFETENSORS | SAFETENSORS |
| Gated | No | No |
| First seen on the Hub | 2025-08-04 | 2026-08-01 |
| API input price / 1M tokens | $0.018 | not on OpenRouter |
| API output price / 1M tokens | $0.09 | not on OpenRouter |
| Est. cost per 1M input + 1M output tokens | $0.11 | not on OpenRouter |
| Cached input / 1M tokens | $0.009 | not on OpenRouter |
| AA Intelligence Index | 10 | not on OpenRouter |
| AA Coding Index | — | not on OpenRouter |
| AA Agentic Index | — | not on OpenRouter |
| Max output tokens | 32,768 | not on OpenRouter |
| API providers | 10 | not on OpenRouter |
| Tool calling | Yes | not on OpenRouter |
| Reasoning mode | Yes | not on OpenRouter |
API cost
Estimated cost of 1M input + 1M output tokens via OpenRouter
gpt-oss-20b
$0.11
Download trend
90 days of snapshots recorded — chart in 0 days.
105.3 M
gpt-oss-20b · all-time downloads
386 K
deepseek-v4-flash-0731-spark · all-time downloads
VRAM side by side
On RTX 4090 · 24 GB · 8K context unless noted
gpt-oss-20b · fp16 @ 128K ctx
82.4 GB / 24 GB
deepseek-v4-flash-0731-spark · fp16 @ 1024K ctx
1,276.0 GB / 24 GB