On July 10th, Beijing time, after an hour of waiting for the world's attention, Musk finally unveiled the mystery of xAI's newest masterpiece, Grok 4, which Musk called "the world's smartest AI". This model, which Musk called "the world's smartest AI", set new records in major benchmark tests as soon as it was released, and became the first AI model to break through the 50% accuracy rate in the "Human Last Exam" (HLE).
Arithmetic scale: unprecedented training inputs
The scale of Grok 4's training reflects xAI's huge investment in AI infrastructure, with an unprecedented level of computing power allocation:
Infrastructure configuration
| Hardware configuration | Specification | Allocation of use |
|---|---|---|
| Pre-training clusters | 100,000 H100 GPUs | Basic model training |
| Enhanced Learning Cluster | 200,000 mixed H100/A100 | RL fine-tuning and inference optimization |
| total computational power (TCP) | Colossus Supercomputing Center | Full Process AI Training |
| training hour ratio | 100 times better than Grok 2 | Deep Learning Iteration |
| RL-calculation ratio | 10x improvement over Grok 3 | Specialized for intensive learning |
Musk revealed that xAI invests almost as much arithmetic in reinforcement learning as it does in pre-training arithmetic, a "dual engine" driven training approach that is extremely rare in the industry. The team trained the model to think, reason and self-correct from first principles, which is the core source of the Grok series reasoning ability.
Training architecture evolution
The training paradigm of the Grok family has undergone significant evolution:
| model version | Main technological paradigms | Computation resource allocation | Core breakthroughs |
|---|---|---|---|
| Grok 2 | Next token prediction | Basic pre-training is the main focus | Scale-up |
| Grok 3 | Pre-training + Preliminary RL | 10X increase in pre-training arithmetic | Introduction of reasoning skills |
| Grok 4 | Native Tool Fusion + Large Scale RL | RL arithmetic boosted by another 10x | Tool Use and Multi-Intelligence |
Core technology architecture: innovative design for native integration
Tool integration training mechanism
Grok 4's biggest technological innovation is the integration of tool-use capabilities directly into the training process, rather than the traditional post-integration approach:
| Technical characteristics | Traditional Programs | Grok 4 Program | performance enhancement |
|---|---|---|---|
| Tool invocation method | Post API Integration | Native Training Fusion | Increase efficiency by 3-5 times |
| learning curve | Period of steep adaptation | smooth growth | Better consistency |
| scalability | constrained by interface | seamless integration | Support for complex tool chains |
| consistency of reasoning | easily faulted | End-to-end optimization | Error Rate Reduction 40% |
This design allows Grok 4 to learn when, how, and why to use specific tools during training, rather than simply calling external APIs.
Multi-Intelligence Collaboration System
Grok 4 Heavy utilizes a multi-intelligence parallel mode of operation with the following technical specifications:
| Collaboration parameters | technical specification | Working mechanisms |
|---|---|---|
| Number of parallel intelligences | Up to 32 | Simultaneous treatment of the same issue |
| Branching Strategies for Reasoning | deep search tree | Each branch is explored independently |
| Collaborative validation mechanisms | Cross-validation algorithms | Inter-intelligence checksums |
| optimal solution selection | Integrated Learning Fusion | Global optimal answer generation |
| Calculation of extensions during testing | Adjustable from 1× to 32× | Dynamically adjusted to task complexity |
This "team of Ph.D. students working in groups" has increased the accuracy of a single smart body from 40% to more than 50%.
Model Performance Parameters
| Core indicators | Grok 4 Specifications | Industry Comparison |
|---|---|---|
| Context length | 256K tokens | Enterprise Application Standards |
| API version number | grok-4-0709 | Latest stable version |
| inference speed | 75 tokens/second | Beyond Claude 4 Opus (66 tokens/second) |
| Latency Optimization | End-to-end halving | Voice interaction in real time |
| concurrent processing | Support multi-user high concurrency | Commercialization Ready |
| model generation | 7th Generation Infrastructure | xAI's latest technology stack |
Benchmarking Performance: Leading Intelligence Across the Board
Academic and Reasoning Skills
The Grok 4 proves its "post-doctoral level" of intelligence with its performance in authoritative tests:
| Test Category | Specific benchmarks | Grok 4 score | Grok 4 Heavy | Comparison of Human Doctorate Levels |
|---|---|---|---|---|
| general subject | HLE (Human Legacy Examination) | 38.6% | 44.4% | Beyond most doctoral students |
| math competition | AIME25 | 100% | 100% | full marks level |
| Team Math | HMMT25 | 96.7% | 96.7% | Top competition level |
| Graduate Student Q&A | GPQA | 88.9% | 88.9% | Doctoral enrollment level |
| math Olympiad | USAMO25 | 61.9% | 61.9% | International competition level |
| Programming Contest | LCB (Jan-May) | 79.4% | 79.4% | Professional programmer level |
AGI Core Competency Assessment
The Grok 4 also excelled in key tests of generalized artificial intelligence:
| AGI Test Program | Grok 4 performance | technical significance | Comparison with Competitors |
|---|---|---|---|
| ARC-AGI-2 | 15.9% | First commercial model to break 10% | 12 times higher than DeepSeek R1 |
| ARC-AGI-1 | 66.7% | Ability to generalize over known patterns | Outperforms GPT-4 by nearly 6 percentage points |
| cost-effectiveness ratio | optimal | Smartest per unit dollar | Industry-leading price/performance ratio |
Special Test Scenarios
In a number of unique test scenarios, Grok 4 demonstrated the ability to outperform traditional AI:
| test scenario | concrete expression | Technical Implications |
|---|---|---|
| Vending-Bench Business Test | Net worth twice as much as second place | Long-term business decision-making capacity |
| RKG Drug Discovery | The only model that breaks 10% | biomedical reasoning |
| Complex Physical Modeling | Successful simulation of black hole collisions | Advanced scientific computing skills |
Pricing and Commercialization Strategies
xAI has a clear high-end positioning strategy for the Grok 4:
| service level | Monthly Pricing | Annual fee pricing | Core functional differences |
|---|---|---|---|
| SuperGrok | Thirty dollars. | $300 | Single Intelligent Body Standard Edition |
| SuperGrok Heavy | $300 | $3,000. | Multi-Intelligence Collaboration Edition |
This pricing strategy positions Grok 4 as a high-end AI service for enterprise and professional users, with an annual fee of up to CNY 21,500 for the Heavy version.
Application Prospects and Industry Integration
Grok 4 will be quickly integrated into Musk's industrial ecosystem: the voice assistant has been integrated into Tesla's latest firmware, and the Optimus robot will be equipped with Grok as its AI brain. xAI plans to release dedicated programming models, multimodal agents, and large-scale video generation models one after another in the next few months to build a complete AI product matrix.
Grok 4 has established a leading position in the AI competition with the computing power advantage of 200,000 GPU clusters and the technological innovation of native tool fusion. Its overwhelming performance in benchmarks, especially in complex tasks that require deep reasoning, marks a significant step towards "super human intelligence". While its high pricing limits its popularity, the Grok 4 offers the most powerful option on the market today for professional users seeking the ultimate in AI power.
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