Side-by-side technical and economic comparison between xAI's Grok 2 and DeepSeek's DeepSeek-V4.1-Reasoner.
• Grok 2: Classified as a Legacy Reference model (Generally Available).
| Metric | Grok 2 | DeepSeek-V4.1-Reasoner | Advantage |
|---|---|---|---|
| Provider Organization | xAI | DeepSeek | — |
| Standard Input / 1M | $2.00 | $0.50 | DeepSeek-V4.1-Reasoner (75% lower) |
| Cached Input / 1M | None | $0.01 | DeepSeek-V4.1-Reasoner lower |
| Output / 1M | $10.00 | $2.50 | DeepSeek-V4.1-Reasoner lower |
| Context Window | 128k | 256k | DeepSeek-V4.1-Reasoner (256k) |
| Max Generation Tokens | 8.2k | 384k | DeepSeek-V4.1-Reasoner |
| Tokenizer Family | xAI Byte-level BPE (~131k vocabulary) | DeepSeek Byte-Level BPE (102k vocabulary) | — |
Opt for Grok 2 when your engineering requirements prioritize xAI's ecosystem, specific tokenizer efficiencies (Calibrated xAI Tokenizer (±3%)), or when your expected prompt-to-completion ratios favor its $2/M input rate.
Opt for DeepSeek-V4.1-Reasoner when looking for DeepSeek's tooling integration, specific context window depth (256k tokens), or when output generation volume favors its $2.5/M rate.