Grok 4 Heavy
READER SUMMARYMulti-agent Grok 4 tier using parallel test-time compute for difficult reasoning tasks.
Why this model scores 77.5
Parallel agents and scaled test-time compute raise capability, autonomy and control difficulty; expensive restricted access lowers deployment relative to Grok 4 but does not eliminate misuse potential.
0 comments · 0 votes
Sign in to join the discussion →
No comments yet. Start the discussion.
News tied to Grok 4 Heavy
The model score of 77.5 rates this model's risk profile. The overall Doom Index of 63.5 measures the recalibrated complete evidence corpus. These values answer different questions.
Each article's leave-one-out Doom Index contribution is divided equally among the exact models named on that article. This prevents multi-model evidence from being claimed in full on several model pages. Model risk scores are recalculated from their technical profile and related news, but never feed back into the overall index.
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.
- Full item contribution
- +0.03
- Grok 4 Heavy equal share
- +0.01
Model score history
- R1Doom Score 77.5
New separately named July 2025 multi-agent model profile verified by xAI.
12 Aug 2026