Overview
Grok 4 was xAI's July 2025 leap into frontier reasoning — a model that combined strong math, coding and science performance with native tool use and live search over X and the web. It established the architecture and benchmark foundation that Grok 4.1 later refined, and at launch it competed with the best from OpenAI and Google on several reasoning suites.
Grok 4 introduced the heavier multi-agent reasoning approach xAI is known for, trading latency for accuracy on hard problems. While Grok 4.1's post-training made the family more pleasant and reliable to use day to day, Grok 4 remains the reasoning backbone of the line.
Key capabilities
- Strong math, science and coding reasoning
- Native tool use and real-time search
- Multi-agent reasoning for hard problems
- Foundation for the Grok 4.x family
At a glance
Reasoning
Frontier-competitive at launch
Tools
Native tool use + live search
Pricing: Mid-to-high tier.
Pros & cons
What we like
- Capable reasoning and tool use
- Real-time information access
- Solid on technical problems
Trade-offs
- Higher latency on multi-agent reasoning
- Day-to-day usability improved with 4.1
The verdict
Grok 4 put xAI on the frontier map with serious reasoning and native real-time tools. It's still capable, but Grok 4.1's refinements make the newer model the better everyday choice for most users.
Best for: Technical reasoning with live web and X access.
Frequently asked questions
Is Grok 4 still worth using over Grok 4.1?
Grok 4.1 is generally the better pick — same reasoning lineage, but friendlier and far fewer hallucinations. Grok 4 remains capable if you specifically want its multi-agent reasoning behaviour.
