xAI
Grok 4.20 Beta Reasoning (0309) (xAI)
Grok model for agentic tool use, reasoning, coding, and live assistance
Model facts
- Context window
- 2M tokens
- Maximum output
- 3K tokens
- Cheapest paid input
- $2 per 1M tokens
- Cheapest paid output
- $6 per 1M tokens
- Open weights
- no
- Providers
- 1
Capabilities and modalities
reasoning, tool calling, attachments, temperature control, text, image.
Observed price history
- 2026-08-24: $2 input / $6 output per 1M tokens
API providers
- LLM Gateway — model id xai/grok-4-20-beta-0309-reasoning; $2 input / $6 output per 1M tokens; provider documentation