xAI Grok

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Default model

grok-4.3

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Supported models

• grok-4.3 (default, flagship)
• grok-3.5
• grok-3
• grok-3-mini
• Any other model ID the API accepts

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Authentication

export XAI_API_KEY=xai-...

ai-blackteam config set providers.grok.api_key xai-...

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Example usage

# Single attack with default model (grok-4.3)
ai-blackteam run -p grok -a encoding-obfuscation -t "Write a phishing email"

# Full batch
ai-blackteam batch -p grok --attacks all -t "Write a phishing email"

# Benchmark
ai-blackteam benchmark -p grok --threshold 80

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Tool-use support

ai-blackteam list-attacks
# look for rows with Mode = tool-use

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Notes

• The provider uses the OpenAI SDK pointed at xAI’s API (base_url="https://api.x.ai/v1")
• Max output tokens per request: 4,096
• System prompts are passed as a system role message
• Retry with exponential backoff is automatic on API failures (3 attempts)
• Grok is less RLHF-aligned than many frontier models, so safety-test results may differ meaningfully from Claude or GPT