May 28th update to the [original DeepSeek R1](/deepseek/deepseek-r1) Performance on par with [OpenAI o1](/openai/o1), but open-sourced and with fully open reasoning tokens. It's 671B parameters in size, with 37B active...
DeepSeek: R1 0528 — DeepSeek. Context window 163,840 tokens. API pricing (per 1M tokens): Input $0.5, Output $2.15. License: Open-Weights. LMArena 1,428. GPQA Diamond 76.3%.
| Provider | DeepSeek |
|---|---|
| API model ID | deepseek/deepseek-r1-0528 |
| Tier | Mid |
| Context window | 163,840 tokens |
| Max output | 32,768 tokens |
| License | Open-Weights |
| API pricing (per 1M tokens) · Input | $0.5 |
| API pricing (per 1M tokens) · Output | $2.15 |
| LMArena | 1,428 (deepseek-r1-0528) |
| GPQA Diamond | 76.3% |
LMArena (CC-BY 4.0, best reasoning setting, 2026-10-02) · GPQA Diamond: Epoch AI (CC-BY 4.0)
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