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xAI is the company behind Grok, a large language model known for its conversational abilities and large context window. Grok models are designed to provide helpful, informative, and contextually relevant responses. Website: https://x.ai/

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Getting an API Key

  1. Sign Up/Sign In: Go to the xAI Console. Create an account or sign in.
  2. Navigate to API Keys: Go to the API keys section in your dashboard.
  3. Create a Key: Click to create a new API key. Give your key a descriptive name (e.g., “Sixth”).
  4. Copy the Key: Important: Copy the API key immediately. You will not be able to see it again. Store it securely.

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Supported Models

Sixth supports the following xAI Grok models:

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Grok-3 Models

  • grok-3-beta (Default) - xAI’s Grok-3 beta model with 131K context window
  • grok-3-fast-beta - xAI’s Grok-3 fast beta model with 131K context window
  • grok-3-mini-beta - xAI’s Grok-3 mini beta model with 131K context window
  • grok-3-mini-fast-beta - xAI’s Grok-3 mini fast beta model with 131K context window

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Grok-2 Models

  • grok-2-latest - xAI’s Grok-2 model - latest version with 131K context window
  • grok-2 - xAI’s Grok-2 model with 131K context window
  • grok-2-1212 - xAI’s Grok-2 model (version 1212) with 131K context window

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Grok Vision Models

  • grok-2-vision-latest - xAI’s Grok-2 Vision model - latest version with image support and 32K context window
  • grok-2-vision - xAI’s Grok-2 Vision model with image support and 32K context window
  • grok-2-vision-1212 - xAI’s Grok-2 Vision model (version 1212) with image support and 32K context window
  • grok-vision-beta - xAI’s Grok Vision Beta model with image support and 8K context window

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Legacy Models

  • grok-beta - xAI’s Grok Beta model (legacy) with 131K context window

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Configuration in Sixth

  1. Open Sixth Settings: Click the settings icon (⚙️) in the Sixth panel.
  2. Select Provider: Choose “xAI” from the “API Provider” dropdown.
  3. Enter API Key: Paste your xAI API key into the “xAI API Key” field.
  4. Select Model: Choose your desired Grok model from the “Model” dropdown.

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Reasoning Capabilities

Grok 3 Mini models feature specialized reasoning capabilities, allowing them to “think before responding” - particularly useful for complex problem-solving tasks.

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Reasoning-Enabled Models

Reasoning is only supported by:
  • grok-3-mini-beta
  • grok-3-mini-fast-beta
The Grok 3 models grok-3-beta and grok-3-fast-beta do not support reasoning.

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Controlling Reasoning Effort

When using reasoning-enabled models, you can control how hard the model thinks with the reasoning_effort parameter:
  • low: Minimal thinking time, using fewer tokens for quick responses
  • high: Maximum thinking time, leveraging more tokens for complex problems
Choose low for simple queries that should complete quickly, and high for harder problems where response latency is less important.

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Key Features

  • Step-by-Step Problem Solving: The model thinks through problems methodically before delivering an answer
  • Math & Quantitative Strength: Excels at numerical challenges and logic puzzles
  • Reasoning Trace Access: The model’s thinking process is available via the reasoning_content field in the response completion object

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Tips and Notes

  • Context Window: Most Grok models feature large context windows (up to 131K tokens), allowing you to include substantial amounts of code and context in your prompts.
  • Vision Capabilities: Select vision-enabled models (grok-2-vision-latest, grok-2-vision, etc.) when you need to process or analyze images.
  • Pricing: Pricing varies by model, with input costs ranging from $0.3 to $5.0 per million tokens and output costs from $0.5 to $25.0 per million tokens. Refer to the xAI documentation for the most current pricing information.
  • Performance Tradeoffs: “Fast” variants typically offer quicker response times but may have higher costs, while “mini” variants are more economical but may have reduced capabilities.