xAI
Grok 4.20 (Reasoning)
Reasoning Grok for document-heavy analysis and long-horizon tool use
Model facts
- Context window
- 2M tokens
- Maximum output
- 3K tokens
- Cheapest paid input
- $1.25 per 1M tokens
- Cheapest paid output
- $2.5 per 1M tokens
- Open weights
- no
- Providers
- 9
Capabilities and modalities
reasoning, tool calling, structured output, attachments, temperature control, text, image, pdf.
Observed price history
- 2026-08-24: $1.25 input / $2.5 output per 1M tokens
API providers
- DevPass (LLM Gateway) — model id grok-4-20-reasoning; $1.25 input / $2.5 output per 1M tokens; provider documentation
- Eden AI — model id xai/grok-4.20-0309-reasoning; $1.25 input / $2.5 output per 1M tokens; provider documentation
- Impossibl — model id xai/grok-4.20-0309-reasoning; $1.25 input / $2.5 output per 1M tokens; provider documentation
- Vercel AI Gateway — model id spacexai/grok-4.20-reasoning; $1.25 input / $2.5 output per 1M tokens; provider documentation
- xAI — model id grok-4.20-0309-reasoning; $1.25 input / $2.5 output per 1M tokens; provider documentation
- Azure — model id grok-4-20-reasoning; $2 input / $6 output per 1M tokens; provider documentation
- Cloudflare AI Gateway — model id xai/grok-4.20-0309-reasoning; $2 input / $6 output per 1M tokens; provider documentation
- DevPass (LLM Gateway) — model id grok-4-20-beta-0309-reasoning; $2 input / $6 output per 1M tokens; provider documentation
- Ofox — model id x-ai/grok-4.20; $4 input / $12 output per 1M tokens; provider documentation