Side-by-side technical and economic comparison between xAI's Grok 2 and OpenAI's OpenAI o1.
• Grok 2: Classified as a Legacy Reference model (Generally Available).
• OpenAI o1: Classified as a Legacy Reference model (Generally Available).
| Metric | Grok 2 | OpenAI o1 | Advantage |
|---|---|---|---|
| Provider Organization | xAI | OpenAI | — |
| Standard Input / 1M | $2.00 | $15.00 | Grok 2 (87% lower) |
| Cached Input / 1M | None | $7.50 | Grok 2 lower |
| Output / 1M | $10.00 | $60.00 | Grok 2 lower |
| Context Window | 128k | 200k | OpenAI o1 (200k) |
| Max Generation Tokens | 8.2k | 100k | OpenAI o1 |
| Tokenizer Family | xAI Byte-level BPE (~131k vocabulary) | OpenAI o200k_base (200k 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 OpenAI o1 when looking for OpenAI's tooling integration, specific context window depth (200k tokens), or when output generation volume favors its $60/M rate.