Grok 4 Fast
10 values about Grok 4 Fast from 1 document, in 6 metric families. In each family, values from its own document come first.
- Developer
- xAI
- Release date
- 19 Sep 2025The date of its first card in the dataset, the Grok 4 Fast Model Card.
- Availability
- Public
- Also printed as
- Grok 4 Fast (reasoning) · Grok 4 Fast (non-reasoning)
- Its own document
- Grok 4 Fast Model Card · 19 Sep 2025
- Also reported in
- No other document reports a value about it
Data as of 26 Sep 2026 · Dataset v0.1 · Methodology v0.1 · Changelog
Values by metric family
Each value as the document printed it. Select a value for its source, its checks and its history.
KeyVerifiedUnverifiedDisputedCorrected read off a figure or stated in wordsA value opens its source and history.
M5 · Honesty and hallucination 2 values
| Evaluation and metric | Value | Document |
|---|---|---|
| From its own documentGrok 4 Fast Model Card · 19 Sep 2025 | ||
| MASKDishonesty rateCondition: non-reasoning | Grok 4 Fast Model Card19 Sep 2025 | |
| MASKDishonesty rateCondition: reasoning | Grok 4 Fast Model Card19 Sep 2025 | |
M6 · Sycophancy 1 value
| Evaluation and metric | Value | Document |
|---|---|---|
| From its own documentGrok 4 Fast Model Card · 19 Sep 2025 | ||
| SycophancySycophancy rateCondition: reasoning | Grok 4 Fast Model Card19 Sep 2025 | |
M7 · Harmful compliance and over-refusal 1 value
| Evaluation and metric | Value | Document |
|---|---|---|
| From its own documentGrok 4 Fast Model Card · 19 Sep 2025 | ||
| AgentHarmAnswer rate on harmful agentic tasksCondition: reasoning; no attack | Grok 4 Fast Model Card19 Sep 2025 | |
M8 · Jailbreak robustness 2 values
| Evaluation and metric | Value | Document |
|---|---|---|
| From its own documentGrok 4 Fast Model Card · 19 Sep 2025 | ||
| JailbreaksAnswer rate on should-refuse promptsCondition: non-reasoning; system prompt jailbreak | Grok 4 Fast Model Card19 Sep 2025 | |
| JailbreaksAnswer rate on should-refuse promptsCondition: reasoning; system prompt jailbreak | Grok 4 Fast Model Card19 Sep 2025 | |
M9 · Prompt injection 1 value
| Evaluation and metric | Value | Document |
|---|---|---|
| From its own documentGrok 4 Fast Model Card · 19 Sep 2025 | ||
| AgentDojoPrompt-injection attack success rateCondition: non-reasoning; with system prompt mitigation | Grok 4 Fast Model Card19 Sep 2025 | |
M10 · Dangerous capabilities and risk determinations 3 values
| Evaluation and metric | Value | Document |
|---|---|---|
| From its own documentGrok 4 Fast Model Card · 19 Sep 2025 | ||
| BioLP-BenchAccuracyCondition: reasoning; without safeguards | Grok 4 Fast Model Card19 Sep 2025 | |
| CybenchUnguided success rateCondition: reasoning; without safeguards | Grok 4 Fast Model Card19 Sep 2025 | |
| VCTAccuracyCondition: reasoning; without safeguards | Grok 4 Fast Model Card19 Sep 2025 | |