Side-by-side comparison of DeepSeek-V4-Flash (DeepSeek · China) and GPT-OSS 120b (OpenAI · USA) for self-hosted deployment of the open-weight model. DeepSeek-V4-Flash is rated conditional; GPT-OSS 120b is EU-ready. They part ways on licence: DeepSeek-V4-Flash is "MIT", GPT-OSS 120b is "Apache 2.0".
| Field | ||
|---|---|---|
| Summary | ||
| Verdict | Conditional DeepSeek-V4-Flash is the smaller-active sibling of V4-Pro under the same MIT terms — permissive on the weights, but the China-based vendor and undocumented training corpus mean any EU deployment still needs a self-hosted topology and a deployer-side GPAI documentation file under AI Act Article 53. | EU-ready OpenAI's first major open-weights release. Apache 2.0, MoE with 5.1B active over 117B total, MXFP4 quantised to fit a single 80GB GPU. Historic shift for a vendor that built its brand on closed weights. |
| Last reviewed | 2026-04-28 | 2026-04-15 |
| Open-weight | ||
| Licence | MIT | Apache 2.0 |
| Commercial use | Unrestricted | Yes |
| Training data | Categories only | Undisclosed |
| Origin | China | USA |
| Performance & pricing? | ||
| Quality index | 47/100 | 33/100 |
| Speed | 79 tok/s | 212 tok/s |
| Blended price | $0.17/M | $0.26/M |
| Context window | — | — |
| Evidence | ||
| Sources | ||
No overlapping sources between the two entries.