# xAI: Grok 4: AI model fact sheet

- **Provider:** xai
- **Released:** 2025-07-09
- **Context window:** 256,000 tokens
- **Parameters:** Not disclosed
- **API pricing:** $3.00 / 1M input, $15.00 / 1M output
- **OpenRouter ID:** x-ai/grok-4
- **Capabilities:** conversation, reasoning, code-generation, analysis

Grok 4 is xAI's latest reasoning model with a 256k context window. It supports parallel tool calling, structured outputs, and both image and text inputs. Note that reasoning is not exposed, reasoning cannot be disabled, and the reasoning effort cannot be specified.

## Benchmarks

| Benchmark | Score |
| --- | --- |
| GPQA | 87-88% |
| AIME 25 | 95% |
| SWE-bench | 72-75% (Grok 4 Code) |
| Humanity Last Exam | 35-45% |

Source: real side-by-side outputs, pricing and specs at https://rival.tips/models/grok-4