xai/grok-4

Grok 4 Release by xAI

Overview

Grok 4 is the latest flagship model from xAI, officially released on July 9, 2025. It features multimodal reasoning, advanced tool usage (in the Heavy variant), and strong academic benchmark performance. Grok 4 is available to X Premium+ users and via xAI’s API, with a strong focus on high-agency, multi-agent reasoning.

• Release Date: July 9, 2025
• Access: X Premium+ & xAI API
• Variants: Grok 4 (single-agent), Grok 4 Heavy (multi-agent)
• Multimodal: Text + Images (video coming soon)
• Context Window: ≈ 256,000 tokens

Features

• Conversational personality with voiced assistant “Eve”
• Multi-agent parallel reasoning (Heavy only)
• Handles text + image inputs
• Coding assistant variant (Grok 4 Code) planned
• Top scores on multiple academic AI benchmarks

Benchmarks

Benchmarks compiled from livestream demos and third-party reporting.

Pricing

API pricing has not yet been officially published, but is expected to align with Grok 3 tiers.

Use Cases

• Multimodal research assistant (text + image)
• Tool-augmented reasoning and self-verification (Heavy)
• Real-time conversational voice agent (Eve)
• Advanced math and visual puzzle solving
• Factual QA and academic performance

Known Limitations

• Base Grok 4 is less powerful than Grok 4 Heavy in reasoning
• Controversial launch history (moderation & PR issues)
• No current support for audio/video input or output
• Benchmarks may include cherry-picked examples

Future Roadmap

• Grok 4 Code: A coding-specialized variant is under development
• Video understanding: Multimodal expansion planned for late 2025
• Tesla integration: Model expected in-car in upcoming software updates

License

Grok 4 is offered under commercial use via X Premium+ and enterprise API integrations. Terms are governed by xAI and X platform policies.