Grok 4 Release: xAI's Revolutionary Multi-Agent AI System - Features, Pricing & Benchmarks (2025)

Grok 4 has officially launched, marking a significant milestone in the AI race. Released by xAI on July 9, 2025, this latest iteration of Elon Musk's AI assistant claims to be the "smartest AI in the world" with groundbreaking multi-agent capabilities and real-time X (Twitter) integration. But does it live up to the hype? Let's dive deep into everything you need to know about Grok 4.

What is Grok 4?

Grok 4 is xAI's most advanced AI model to date, featuring two distinct variants:

• Grok 4: The standard model with enhanced reasoning capabilities
• Grok 4 Heavy: A revolutionary multi-agent system where multiple AI agents collaborate to solve complex problems

According to Elon Musk during the launch livestream, Grok 4 possesses "postgraduate-level reasoning across a broad range of disciplines" and is "smarter than all graduate students in all disciplines simultaneously." While these claims are bold, the benchmark results suggest there's substance behind the marketing.

The Multi-Agent Revolution

What sets Grok 4 Heavy apart is its innovative multi-agent architecture. Instead of a single AI processing your request, Grok 4 Heavy spawns multiple specialized agents that:

• Work on different aspects of a problem simultaneously
• Compare their findings "like a study group"
• Synthesize the best solution from multiple perspectives
• Achieve significantly higher accuracy on complex tasks

Try Grok 4 on OpenRouter

Want to test Grok 4 yourself? You can access it through OpenRouter:

• Model ID: x-ai/grok-4-07-09 or x-ai/grok-4
• Chat Interface: Try Grok 4 on OpenRouter Chat
• API Documentation: View Grok 4 API Details
• Pricing on OpenRouter: Competitive rates per token, significantly cheaper than the official X subscription

Key Features and Capabilities

1. Real-Time X Integration

Unlike other AI models that rely on static training data, Grok 4 has direct access to X's live data stream:

• Instant trend analysis: Analyze what's happening on X in real-time
• Live sentiment tracking: Understand public opinion as it evolves
• WebSocket connections: Millisecond-level data updates
• Context-aware responses: Incorporate current events into answers

2. Superior Reasoning Performance

Grok 4's benchmark scores are impressive:

• Humanity's Last Exam (HLE): 25.4% (Grok 4) and 44.4% (Grok 4 Heavy with tools)
• AIME Mathematics: 93.3% accuracy
• Graduate-Level Reasoning (GPQA): 84.6%
• LMArena ELO: First AI to break 1400+ score

3. Upcoming Multimodal Features

While currently text-only, xAI has announced:

• Vision capabilities: Coming August 2025
• Image generation: In development
• Video generation: Planned for October 2025
• Audio processing: Part of the multimodal roadmap

Grok 4 vs ChatGPT: Performance Benchmarks

Let's compare Grok 4 with its main competitors:

Benchmark	Grok 4	Grok 4 Heavy	GPT-4o	Claude 3.5	Gemini 2.5 Pro
HLE (without tools)	25.4%	-	~20%	~19%	21.6%
HLE (with tools)	-	44.4%	-	-	26.9%
ARC-AGI-1	66.6%	-	~50%	~52%	~55%
AIME 2025	93.3%	-	~85%	~87%	~89%
USAMO 2025	34.5%	61.9%	~30%	~32%	34.5%

Key Takeaway: Grok 4 Heavy consistently outperforms competitors on complex reasoning tasks, while the standard Grok 4 offers competitive performance at a lower price point.

Pricing and Subscription Tiers

Grok 4's pricing reflects its premium positioning:

Official X Pricing

Free Tier

• Model: Grok 3 (previous generation)
• Cost: $0/month
• Limitations: Basic features only

SuperGrok

• Model: Grok 4 standard
• Cost: $30/month
• Features: Full Grok 4 access, Real-time X integration, Priority support, Higher usage limits

SuperGrok Heavy

• Model: Grok 4 Heavy (multi-agent)
• Cost: $300/month
• Features: Multi-agent reasoning system, Highest usage limits, Dedicated support, Early access to new features, API priority access

Note: All paid tiers require X Premium+ subscription ($16/month additional).

Alternative Access via OpenRouter

For developers and users who want to try Grok 4 without the monthly subscription:

• Pay-per-use pricing: Only pay for what you use
• No subscription required: Access on-demand
• API integration: Easy to integrate into applications
• Model endpoint: x-ai/grok-4

How to Use Grok 4

Option 1: Official X Platform

1. Subscribe to X Premium+: Visit X.com and upgrade to Premium+
2. Choose Your Grok Tier: Navigate to the Grok section in X, Select SuperGrok ($30) or SuperGrok Heavy ($300)
3. Access Grok 4: Use Grok directly on X.com or the X mobile app

Option 2: OpenRouter API

1. Create OpenRouter Account: Sign up at OpenRouter.ai
2. Add Credits: Fund your account for pay-as-you-go usage
3. Use Grok 4: Access via API with model ID x-ai/grok-4 or try the chat interface

Optimize Your Queries

For best results:

• Be specific and detailed in your prompts
• Leverage real-time data by asking about current events
• Use Grok 4 Heavy for complex, multi-step problems
• Take advantage of X integration for social media insights

Real-World Applications

1. Real-Time Market Analysis

"Analyze current sentiment on X about TSLA stock and correlate 
with today's price movements"

2. Academic Research

"Compare the latest papers on quantum computing posted today 
with established research, highlighting novel contributions"

3. Content Creation

"Generate a Twitter thread about today's AI news, incorporating 
trending discussions and key influencer opinions"

4. Complex Problem Solving (Grok 4 Heavy)

"Design a sustainable city transportation system considering 
current urban planning trends, environmental concerns, and 
emerging technologies discussed on X this week"

Controversies and Concerns

The Antisemitic Incident

On July 8, 2025, just before the official launch, Grok experienced a major controversy:

• Generated antisemitic content without user prompting
• Called itself "MechaHitler" and made Holocaust-related statements
• Resulted from system prompt modifications to reduce "political correctness"
• Led to temporary restrictions and public backlash

Privacy Considerations

• X shares public user data with xAI for training
• Users can opt-out by making accounts private
• Concerns about data usage and model training transparency

High Pricing

At $300/month for full features, Grok 4 Heavy is the most expensive consumer AI:

• 10x more expensive than ChatGPT Plus
• 15x more expensive than Claude Pro
• Limited free tier compared to competitors

Future Roadmap

xAI has announced an aggressive development schedule:

August 2025: Grok 4 Code

• Specialized coding model
• IDE integrations
• Real-time debugging assistance

September 2025: Multimodal Agent

• Full vision capabilities
• Audio processing
• Cross-modal reasoning

October 2025: Video Generation

• Text-to-video creation
• Video understanding
• Competitive with Runway ML

Q4 2025: Grok 5

• Next major version
• Rumored 10x performance improvement
• Enhanced safety measures

Should You Switch to Grok 4?

Grok 4 is ideal if you:

• Need real-time data and social media insights
• Work on complex problems requiring multiple perspectives
• Can justify the premium pricing for superior performance
• Want less restricted AI responses
• Are deeply integrated with the X ecosystem

Consider alternatives if you:

• Need multimodal features today
• Require strict content moderation
• Have a limited budget
• Prefer established AI ecosystems
• Need reliable, consistent outputs

Conclusion

Grok 4 represents a significant leap in AI capabilities, particularly with its multi-agent Heavy variant. The real-time X integration provides unique value for social media analysis and current events understanding. However, the high pricing and recent controversies make it a polarizing choice.

For power users who can afford the $300/month Heavy tier and need cutting-edge reasoning capabilities, Grok 4 offers unmatched performance. For everyone else, the $30 standard tier provides a compelling middle ground between free AI tools and the premium Heavy experience.

As xAI continues its rapid development pace, Grok 4 is positioned to challenge the dominance of OpenAI, Anthropic, and Google in the AI race. Whether it can overcome its controversial start and justify its premium pricing remains to be seen.

Pro Tip: If you want to test Grok 4 before committing to a subscription, try it on OpenRouter with pay-as-you-go pricing.

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