DeepSeek DeepSeek-V4-Flash vs OpenAI gpt-oss-20b — side-by-side specs.
DeepSeek DeepSeek-V4-Flash | OpenAI gpt-oss-20b | |
|---|---|---|
| Overview | ||
| Company | DeepSeek | OpenAI |
| Release date | Apr 24 2026 | Aug 5 2025 |
| Model type | — | — |
| Open source | Yes | Yes |
| Specifications | ||
Parameters | — | — |
Context window | — | — |
| Benchmarks | ||
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 88.1% | — |
| Timeline | ||
| Release gap | gpt-oss-20b shipped 262 days before DeepSeek-V4-Flash | |
DeepSeek-V4-Flash and gpt-oss-20b don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. gpt-oss-20b shipped 262 days before DeepSeek-V4-Flash, so benchmark comparisons should account for the intervening progress.
Published specifications for these two models are limited — see each model page for the latest details.
Direct benchmark comparisons are unavailable — DeepSeek-V4-Flash and gpt-oss-20b don't publish scores on any of the same benchmarks.