Grok 4, released by xAI on July 9, 2025, is the fourth-generation model in the Grok family and the most advanced to date. It is multimodal, supporting text, vision, tool use, and real-time web search, with a reported 256,000-token context window for long-form reasoning and document analysis. Its training data extends through November 2024, making it the most up-to-date Grok model at launch.
The lineup includes Grok 4 Generalist for broad tasks, Grok 4 Heavy for higher-capacity reasoning, and Grok 4 Code optimized for programming and debugging. A notable feature is its always-on “Think” mode, designed for deeper multi-step reasoning. While xAI has not disclosed parameter counts, Grok 4 is positioned to compete with frontier models like GPT-5 and Claude 4, balancing real-time knowledge via web integration with structured tool use. It is best suited for coding, complex reasoning, and multimodal AI assistants.
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Past 30 DaysGrok 4 has not yet been evaluated on the current benchmark. The results below are from the legacy version of Vision Evals, our previous benchmark. See the current Vision Evals
| Category | Passed | Score |
|---|---|---|
| Defect Detection | 12 / 15 | 80% |
| Object Understanding | 8 / 14 | 57.1% |
| Spatial Understanding | 10 / 19 | 52.6% |
| Document Understanding | 4 / 9 | 44.4% |
| Object Counting | 1 / 10 | 10% |
Scores based on a single evaluation run · Methodology
View all legacy Vision Evals results →Estimated cost per task vs. Visual Understanding score, for this model and others ranked near it. Upper-left is the sweet spot (high quality, low cost). Based on Vision Evals (legacy) results.
6 of 7 models plotted · 1 not yet evaluated
| Model | Score | Median tokens | Est. cost / task | Compare |
|---|---|---|---|---|
| Claude Haiku 4.5 | 58.2% | 2.3K | $0.0030 | Compare |
| GPT-5 Nano | 58.2% | 2.7K | $0.0003 | Compare |
| Qwen3.5 397B A17B | 58.2% | 1.5K | $0.0008 | Compare |
| Gemini 2.5 Flash | 55.2% | 476 | $0.0005 | Compare |
| Gemini 2.5 Flash-Lite | 53.7% | 301 | <$0.0001 | Compare |
| Grok 4(this model) | 52.2% | — | — | — |
| Kimi K2.5 | 35.8% | 2.7K | $0.0024 | Compare |
Other models worth comparing for similar use cases.
Grok 4 is proprietary: the weights are not distributed, and the Grok 4 license is the vendor's commercial terms of service that you accept when you call the API.
Vendor terms govern data retention, whether your inputs can be trained on, rate limits, and regional availability, and they can change with notice. Review them if you handle regulated or customer data.
Proprietary terms are set by the vendor rather than negotiated per project, and no open-source obligation attaches to your code. If you would rather deploy a model whose commercial license is included in your plan — on Roboflow Managed Cloud or a Self-Hosted Inference Server — Roboflow's licensing page lists the supported alternatives to Grok 4.
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Yes. Grok 4 accepts image input, and on Roboflow's previous vision benchmark it passed 52.2% of visual understanding tasks (#63 of 77). You can test it on your own image in the demo above.
Grok 4 has not yet been evaluated on Roboflow's current Vision Evals. The results on this page are from the previous benchmark.
Yes. The demo on this page runs Grok 4 in the free Roboflow Playground: upload an image and see results in seconds. A free account unlocks unlimited runs.