Grok 3 Fast Beta
xAIText
Grok 3 Fast Beta is a text model from xAI with a context window of 131K tokens and max output of 131K tokens. Pricing starts at $5.00 per million input tokens and $25.00 per million output tokens (cheapest at Vercel Ai Gateway).
Specifications
| Model Key | xai/grok-3-fast-beta |
| Provider | xAI |
| LiteLLM Provider | xai |
| Mode | Text |
| Canonical Name | grok-fast-3 |
| Context Window | 131K tokens |
| Max Output | 131K tokens |
Capabilities
✗ Vision✓ Function Calling✗ Reasoning✗ JSON Schema✗ System Messages✓ Web Search✗ Prompt Caching✗ Audio Input✗ Audio Output
Pricing
| Type | Per 1K Tokens | Per 1M Tokens |
|---|---|---|
| Input Tokens | $0.0050 | $5.00 |
| Output Tokens | $0.025 | $25.00 |
| Cache Read (Input) | $0.0013 | $1.25 |
Price Comparison by Provider
Compare prices for Grok 3 Fast Beta across different providers. The same model may be available through multiple providers at different price points.
Provider | Model Key | Input Price | Output Price |
|---|---|---|---|
| Vercel Ai Gateway | vercel_ai_gateway/xai/grok-3-fast | $5.00 | $25.00 |
| xAI | xai/grok-3-fast-beta | $5.00 | $25.00 |
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