Side-by-side comparison
Grok 4 vs GPT-5.2
| Grok 4 | GPT-5.2 | |
|---|---|---|
| Provider | xAI | OpenAI |
| Context window Maximum tokens (input + output) the model can process in a single request. Glossary → | 256,000 | 400,000 |
| Capabilities Optional capabilities the model advertises: vision (images), tools (function calling), json_mode (structured output). | vision, tools, json_mode | vision, tools, json_mode |
| Input $ / 1M tokens Cost for tokens you send (prompt + context). Cheaper side highlighted. Glossary → | 3.0000 | 1.7500 |
| Output $ / 1M tokens Cost for tokens the model generates. Output is normally 3–5× pricier than input. Glossary → | 15.0000 | 14.0000 |
Frequently asked questions
Which is cheaper, Grok 4 or GPT-5.2?
GPT-5.2 is cheaper than Grok 4 on a 50/50 input/output blend by about $1.125 per 1M tokens. Exact savings depend on your input-vs-output ratio — use the cost calculator on this page for a workload-specific estimate.
Which has a larger context window, Grok 4 or GPT-5.2?
GPT-5.2 has the larger context window at 400k tokens versus 256k tokens for Grok 4. That means GPT-5.2 can ingest about 1.6x as much text per request.
What is the difference between Grok 4 and GPT-5.2?
Grok 4 comes from xAI; GPT-5.2 comes from OpenAI. They differ in pricing, context window, and supported capabilities — see the side-by-side table on this page for the exact figures, refreshed nightly.