Elon Musk has reignited the AI rivalry by claiming that Grok 4 Heavy, the flagship model from his company xAI, had already outperformed OpenAI’s newly launched GPT-5 — two weeks before its official debut.
“Bottom line though: Grok 4 Heavy was smarter 2 weeks ago than GPT-5 is now and G4H is already a lot better. Let that sink in,” Musk wrote on X (formerly Twitter).
The Tesla and SpaceX CEO added that Grok 4 Thinking ranked higher than GPT-5 on the ARC-AGI 2 leaderboard, a benchmark for AI reasoning. Looking ahead, Musk announced that Grok 5 will launch before the end of 2025 and promised it would be “crushingly good.”
Alongside the AI model update, Musk revealed that Grok Imagine — a new image and video generation tool — is now available to all xAI users.
Musk’s Warning to Microsoft
Musk also issued a bold statement aimed at Microsoft CEO Satya Nadella, warning that OpenAI could “eat Microsoft alive” as competition in the AI space heats up.
OpenAI’s GPT-5 Launch
OpenAI, meanwhile, unveiled GPT-5 during a livestream, calling it a “major upgrade” over previous ChatGPT models. CEO Sam Altman highlighted improvements in coding, creative writing, math, health, and visual perception.
Key GPT-5 features include:
- Ability to generate apps, websites, and games in minutes using natural language prompts.
- A dual-mode system that automatically switches between reasoning and efficiency models depending on the user’s query.
- Stronger capabilities in complex problem-solving and creative content generation.
Availability & Pricing
GPT-5 is rolling out to free ChatGPT users with a usage limit, after which access switches to a smaller GPT-5 mini version.
- Plus subscribers get higher limits.
- Pro subscribers gain access to GPT-5 Pro, offering maximum performance.
- Enterprise and education customers will get access in the coming week.