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Grok-4 Heavy

xAI

Overview

Overview

Grok 4 Heavy is the multi-agent version of Grok 4, released alongside the standard model in summer 2025. This system spawns multiple Grok 4 agents in parallel that work independently on problems and then collaborate by comparing their solutions, similar to a study group. The agents share insights and tricks they discover, with the system intelligently combining their work rather than simply using majority voting. Grok 4 Heavy uses approximately 10x more test-time compute than regular Grok 4, enabling it to solve significantly more complex problems. On the Humanities Last Exam, it achieves over 50% accuracy on text-only problems, and it scored a perfect result on the AIME 2025 mathematics competition. The system represents a major advancement in multi-agent AI collaboration and reasoning capabilities.

Grok-4 Heavy.

Performance

Timeline

ReleasedUnknown
Knowledge CutoffUnknown

Specifications

Parameters
Unknown
License
Proprietary
Training Data
Unknown

Benchmarks

Benchmarks

Grok-4 Heavy Performance Across Datasets

Scores sourced from the model's scorecard, paper, or official blog posts

LLM Stats Logollm-stats.com - Thu Feb 12 2026
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Pricing

Pricing

Pricing, performance, and capabilities for Grok-4 Heavy across different providers:

No pricing information available for this model.

API Access

API Access Coming Soon

API access for Grok-4 Heavy will be available soon through our gateway.

Recent Posts

Recent Reviews

FAQ

Common questions about Grok-4 Heavy

Grok-4 Heavy was created by xAI.
Grok-4 Heavy is released under the Proprietary license.
Grok-4 Heavy has a knowledge cutoff of December 2024. This means the model was trained on data up to this date and may not have information about events after this time.
Yes, Grok-4 Heavy is a multimodal model that can process both text and images as input.