Elon Musk's xAI launches Grok 4, claiming top spot among industry AI models

Elon Musk's xAI today announced Grok 4, its latest flagship multimodal AI model. xAI claims that Grok 4 is a top-tier AI model with state-of-the-art performance in academic, mathematical, and reasoning benchmarks. The Grok 4 Heavy version, with multi-agent tools, delivers even more impressive gains in popular AI benchmarks.

Academic and Reasoning Benchmarks:

• Humanity’s Last Exam (HLE): Grok 4 (no tools) achieved 25.4%, outperforming Google’s Gemini 2.5 Pro (21.6%) and OpenAI’s o3-high (21%). Grok 4 Heavy (multi-agent + tools) reached 44.4%, compared to Gemini 2.5 Pro with tools at 26.9%.
• ARC-AGI-2: Grok 4 scored 16.2%, nearly double the next-highest model (Claude Opus 4).
• MMLU-style evaluations: Achieved a 0.866 score (86.6%) on MMLU with an overall Intelligence Index of 73, leading the industry.

STEM & Coding Benchmarks:

• GPQA: Grok 4 scored 87.5%, while the more powerful Grok 4 Heavy variant reached 88.9%.
• AIME: Grok 4 Heavy achieved a perfect 100% score, while Grok 4 achieved 98.8%.
• SWE-Bench: A specialized variant, Grok 4 Code, which will be released in August 2025, has achieved a 72-75% score on the SWE-bench.

According to Artificial Analysis, Grok 4 has achieved an Artificial Analysis Intelligence Index of 73, which is ahead of OpenAI o3 at 70 and Google Gemini 2.5 Pro at 70.

Grok 4 is at the point where it essentially never gets math/physics exam questions wrong, unless they are skillfully adversarial.

It can identify errors or ambiguities in questions, then fix the error in the question or answer each variant of an ambiguous question. https://t.co/vB6NUOZTOX

 

— Elon Musk (@elonmusk) July 10, 2025

Grok 4's API pricing is the same as that of Grok 3; it costs $3/$15 per 1M input/output tokens ($0.75 per 1M cached input tokens).

For consumers, xAI has new subscription tiers. The basic free tier will only have limited access to Grok 3. The SuperGrok plan costs $30/month and will give you increased access to the Grok 4 and Grok 3 models. The $300/month SuperGrok Heavy plan will offer access to Grok 4 Heavy, Grok 4, and Grok 3.

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