DeepSeek-V4.1-Flash vs Union Alpha
Specs, per-token pricing, and live benchmark scores — refreshed daily from our benchmark database.
Specs & pricing
| DeepSeek-V4.1-Flash | Union Alpha | |
|---|---|---|
| Company | DeepSeek | Stealth |
| Released | Sep 2026 | Sep 2026 |
| Context window | 1.0M | 262K |
| Input /1M tokens | $0.3 | free |
| Output /1M tokens | $1.2 | free |
| Open weights | Yes | No |
Benchmarks
| Benchmark | DeepSeek-V4.1-Flash | Union Alpha |
|---|---|---|
| GPQA | 90.9% | — |
| MMLU-Pro | 74.1% | — |
| Speed (tok/s) | 220 tok/s | — |
Scores come from published leaderboards and official model cards (sources listed on the benchmarks page) and refresh daily. Pricing via vendor pages and OpenRouter.