xAI / xai/grok-4.20-0309-reasoning
Grok 4.20 Reasoning 0309 - access through LLMTR
Useful when you want more deliberate output on harder analysis, comparison, and multi-step problem solving. It prioritizes reasoning depth over minimum latency.
Technical specifications
| Canonical ID | xai/grok-4.20-0309-reasoning |
|---|---|
| Provider | xAI |
| Context window | 2,000,000 tokens |
| Operations | RESPONSES |
| Modalities | text |
Pricing
An 8% platform margin applies to credit top-ups; model usage prices are not separately marked up.
| Operation | Metric | Unit | Price |
|---|---|---|---|
| RESPONSES | INPUT_TEXT | PER_1M_TOKENS | $1.25 |
| RESPONSES | OUTPUT_TEXT | PER_1M_TOKENS | $2.50 |
Example usage
With existing OpenAI SDK flows, change only the base URL and model identifier.
curl https://llmtr.com/v1/chat/completions -H "Authorization: Bearer llmtr-your_key" -H "Content-Type: application/json" -d '{"model":"xai/grok-4.20-0309-reasoning","messages":[{"role":"user","content":"Hello"}]}'Guides about this model
- Grok 4.20 Reasoning 0309: trading latency for depth, and 30-day data retention - This model is listed with a 'Beta' label, and its catalog description states it prioritizes reasoning depth over speed. This article covers when that trade-off adds value and what the data-retention note means.
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- Grok Imagine Video 1.5 xai/grok-imagine-video-1.5
- Grok 4.20 Multi-Agent xai/grok-4.20-multi-agent
- Grok 4.20 Non-Reasoning 0309 xai/grok-4.20-0309-non-reasoning
- Grok Imagine Image xai/grok-imagine-image