grok-4.20-0309-reasoning API pricing variable pricing
grok-4.20-0309-reasoning by xAI costs $1.25 per 1M input tokens and $2.50 per 1M output tokens (1M in + 1M out = $3.75).
- API model id
grok-4.20-0309-reasoning- Input / 1M
- $1.25
- Output / 1M
- $2.50
- Cached input / 1M
- $0.20
- Context window
- 1M
- Notes
- Prompts <200K tokens shown.
- Source
- https://docs.x.ai/docs/models
- Provider type
- First-party (HQ: US)
- Regions
- unknown
- EU data residency
- unknown — Not stated on the models/pricing page.
- Last verified
- 2026-10-15
Variable pricing
The effective price of this model depends on the request. Figures above are the base (short-context / peak) tier.
- Depends on context length: Prompts >=200K tokens: $2.5 input / $0.4 cached / $5 output per 1M (all tokens in the request).
Cost estimate
| Provider | Model | Cost |
|---|---|---|
| xAI | grok-4.20-0309-reasoning | $1.88 |
Uses standard list prices (no caching, batch or off-peak discounts). € and CHF rows are priced in that currency by the provider and not converted, so compare them with care.
Other xAI models
- grok-4.7: $2.00 / $6.00
- grok-4.6: $2.00 / $6.00
- grok-4.5: $2.00 / $6.00
- grok-4.3: $1.25 / $2.50
- grok-4.20-0309-non-reasoning: $1.25 / $2.50
- grok-build-0.1: $1.00 / $2.00