Grok 4.1 Fast
Production tool-calling model with two-million-token context and first-party search, code, document, and MCP tools.
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Why this model scores 78.4
Broad API reach and autonomous server-side tool chaining drive autonomy and deployment; hosted infrastructure preserves some access control.
News tied to Grok 4.1 Fast
The model score of 78.4 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.
Grok 4.1 Fast adds fully autonomous agent tools
SpaceXAI released Grok 4.1 Fast with a two-million-token context and an API that lets it independently use web search, X search, code execution, documents, and MCP tools.
- Full item contribution
- +0.17
- Grok 4.1 Fast equal share
- +0.17
Model score history
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R4
Doom Score 78.4
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 78.4
Exact-version evidence chronology replayed after run doombench-hourly-news-20260812-142416 under temporal-monthly-pressure-v4.
12 Aug 2026 -
R2
Doom Score 78.1
Exact-version evidence chronology replayed after run doombench-hourly-news-20260812-132112 under fixed-sensitivity-v3.
12 Aug 2026 -
R1
Doom Score 77.3
New exact model profile from dated model and Agent Tools API launch.
11 Aug 2026