LLM Comparison
Grok 4.20 vs Grok 4.1 Fast
Side-by-side specs, pricing & capabilities · Updated April 2026
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2/6 modelsSame tier:
| Organization | ||
| OpenTools Score | ||
| Family | Grok | Grok |
| Status | Current | Current |
| Release Date | Mar 2026 | Nov 2025 |
| Context Window | 2.0M tokens | 2.0M tokens |
| Input Price | $2.00/M tokens | $0.20/M tokens |
| Output Price | $6.00/M tokens | $0.50/M tokens |
| Pricing Notes | Cache read: $0.2000/M tokens | Cache read: $0.0500/M tokens |
| Capabilities | textvisioncode | textvisioncode |
| Max Output | — | 30K tokens |
| API Identifier | x-ai/grok-4.20 | x-ai/grok-4.1-fast |
| View Grok 4.20 | View Grok 4.1 Fast |
Cost Calculator
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| Model | Input | Output | Total / mo | vs Best |
|---|---|---|---|---|
| Grok 4.1 FastCheapest | $0.20 | $0.25 | $0.45 | — |
| Grok 4.20 | $2.00 | $3.00 | $5.00 | +1011% |
xAI
Grok 4.20
Grok 4.20 is a multimodal llm from xAI. Supports up to 2,000,000 token context window. Available from $2.00/M input tokens.
xAI
Grok 4.1 Fast
Grok 4.1 Fast is a multimodal llm from xAI. Supports up to 2,000,000 token context window. Available from $0.20/M input tokens.
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