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
A 6% 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"}]}'Related models
- Grok 4.3 xai/grok-4.3
- 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
- Grok Imagine Image Quality xai/grok-imagine-image-quality
- Grok Imagine Video xai/grok-imagine-video
- Grok Voice TTS xai/grok-voice-tts
- Grok Voice STT xai/grok-voice-stt