Grok 4 Heavy
Multi-agent Grok 4 tier using parallel test-time compute for difficult reasoning tasks.
0 comments · 0 votes
Sign in to join the discussion →
No comments yet. Start the discussion.
Why this model scores 76.8
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.
News tied to Grok 4 Heavy
The model score of 76.8 rates this model's risk profile. The overall Doom Index of 67.9 measures the complete temporally weighted evidence record. These values answer different questions.
Each article's current 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 use a bounded temporal offset around their technical profile, 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
- +0.17
- Grok 4 Heavy equal share
- +0.08
Model score history
-
R4
Doom Score 76.8
Source-backed model availability audit using the model's existing primary or authoritative catalogue evidence. Exact-version evidence chronology replayed under temporal-monthly-pressure-v4.
12 Aug 2026 -
R3
Doom Score 76.8
Exact-version evidence chronology replayed after run doombench-hourly-news-20260812-142416 under temporal-monthly-pressure-v4.
12 Aug 2026 -
R2
Doom Score 77.0
Exact-version evidence chronology replayed after run doombench-hourly-news-20260812-132112 under fixed-sensitivity-v3.
12 Aug 2026 -
R1
Doom Score 77.5
New separately named July 2025 multi-agent model profile verified by xAI.
12 Aug 2026