xAI releases Grok 4 and multi-agent Grok 4 Heavy
xAI released Grok 4 with native tool use and real-time search, plus Grok 4 Heavy, which runs multiple reasoning agents in parallel. Access included subscriptions and the Grok 4 API.
TOWARD DOOM72confidence 90/100
Why it moved the index
The release combined frontier reasoning, native tools, live information access and a parallel multi-agent tier, materially advancing consequential capability and autonomous problem solving.
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AUDIT TRAIL
Assessment history
- R1Toward 72 · confidence 90
New exact July 2025 model release verified against xAI's official product page and an exact contemporaneous publication clock.
12 Aug 2026