Exploring the New Features of Grok 4 by xAI
**Introduction**
On July 9, 2025, xAI unveiled Grok 4, heralded as the world’s most advanced AI model. Built to rival the likes of OpenAI’s ChatGPT and Google’s Gemini, Grok 4 introduces groundbreaking features that push the boundaries of artificial intelligence. From enhanced reasoning to multimodal capabilities, here’s a deep dive into what makes Grok 4 a game-changer.
**1. Unparalleled Reasoning with Reinforcement Learning**
Grok 4 leverages xAI’s 200,000-GPU Colossus supercomputer for scaled reinforcement learning, resulting in PhD-level proficiency across academic disciplines. It excels in benchmarks like Humanity’s Last Exam (HLE), scoring 44.4% with tools and 50.7% in its “Heavy” configuration, doubling the performance of prior models. Additionally, Grok 4 scores 15.9% on ARC-AGI v2, nearly twice that of Claude 4 Opus (8.6%), showcasing its ability to tackle abstract reasoning and complex puzzles.[](https://www.datacamp.com/blog/grok-4)[](https://techcrunch.com/2025/07/09/elon-musks-xai-launches-grok-4-alongside-a-300-monthly-subscription/)
**2. Native Tool Use and Agentic Design**
Unlike its predecessors, Grok 4 is natively trained for tool use, enabling it to autonomously call external resources like code interpreters and web searches. This agentic design allows Grok 4 to handle real-world tasks, such as managing a vending business in the Vending-Bench simulation, where it outperformed competitors in revenue and scale. The Grok 4 Heavy variant, which spawns multiple agents to collaborate like a “study group,” further boosts performance, achieving a 5–8% lift in coding patch accuracy.[](https://www.datacamp.com/blog/grok-4)[](https://smythos.com/developers/ai-models/whats-new-in-grok-4-release-facts-benchmarks-and-value/)
**3. Multimodal Capabilities and Future Expansions**
Grok 4 currently supports text, with vision and image-generation features slated for release soon. Its context window reaches 128K tokens, with higher rates for extended inputs, making it ideal for developers and researchers. xAI also introduced Grok 4 Code, a specialized variant for real-time IDE integration, enhancing developer workflows. By September 2025, full multimodal support is expected, potentially including image editing and visualization tools.[](https://yourgpt.ai/blog/updates/grok-4)[](https://www.bleepingcomputer.com/news/artificial-intelligence/grok-4-spotted-ahead-of-launch-with-special-coding-features/)
**4. Enhanced Voice Mode**
Grok 4’s voice capabilities, featuring the British-accented “Eve,” offer a conversational, low-latency experience (~250 ms server-side). It outperforms rivals like ChatGPT in voice responsiveness and can mimic human-like emotions, such as switching from speaking to singing. This makes Grok 4 a compelling choice for voice-driven applications.[](https://www.analyticsvidhya.com/blog/2025/07/grok-4-is-here/)[](https://smythos.com/developers/ai-models/whats-new-in-grok-4-release-facts-benchmarks-and-value/)
**5. Accessibility and Pricing**
Grok 4 is available via xAI’s API, the Grok app, and X, with a $30/month SuperGrok plan or a $300/month SuperGrok Heavy tier for advanced features. API pricing starts at $3/million input tokens, doubling for contexts over 128K. While Grok 4 Heavy offers premium performance, its high cost targets enterprises and researchers.[](https://techcrunch.com/2025/07/09/elon-musks-xai-launches-grok-4-alongside-a-300-monthly-subscription/)[](https://simonwillison.net/2025/Jul/10/grok-4/)
**Challenges and Controversies**
Despite its advancements, Grok 4 has faced scrutiny. Reports indicate it references Elon Musk’s views on controversial topics, raising bias concerns. Additionally, safety issues, such as jailbreaking risks and prior antisemitic outputs from Grok 3, highlight the need for stronger guardrails. xAI is addressing these through post-release updates.[](https://techcrunch.com/2025/07/10/grok-4-seems-to-consult-elon-musk-to-answer-controversial-questions/)[](https://www.cnbc.com/2025/07/11/grok-4-appears-to-reference-musks-views-when-answering-questions-.html)
**Conclusion**
Grok 4 sets a new standard for AI with its reasoning, tool use, and multimodal potential. While challenges remain, its performance on benchmarks and practical applications makes it a formidable contender. Whether you’re a developer, researcher, or AI enthusiast, Grok 4 is worth exploring. Stay tuned for xAI’s upcoming coding and multimodal updates!
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*Call to Action*: Try Grok 4 on xAI’s platform or API at https://x.ai/api and share your experiences
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