Grok 4.20 0309 Reasoning
AvailableDated reasoning Text API endpoint; no release date inferred from its identifier.
Access details: xAI API
Dated snapshot · Identity and lifecycle apply to this exact identifier and serving surface.
grok-4.20-0309-reasoningCapabilities & limits
- Context window
- 1M
- Maximum output
- Not verified
- Image input
- Not verified
- Tool calling
- Not verified
- Structured output
- Not verified
Documented interfaces and limits. These are not measures of model quality.
Pricing
USD / 1M tokens- Input
- $1.25USD per 1M tokens for prompts below 200k tokens.
- Output
- $2.50USD per 1M tokens for prompts below 200k tokens.
USD per million standard text tokens. Detailed cache, batch and other pricing conditions appear in the rate card.
Detailed cache, batch, context-tier, and regional prices have not been captured yet. Check the provider's current pricing before budgeting.
Price history
Input $1.25 per million tokens
USD per 1M tokens for prompts below 200k tokens.
Output $2.50 per million tokens
USD per 1M tokens for prompts below 200k tokens.
Technical details
Technical details have not been verified for this identifier.
6 details not verified
- Parameters
- Active parameters
- Architecture
- Training / knowledge cutoff
- Input modalities
- Output modalities
From xAI
Official announcement link: not verified yet.
How they describe it
Provider quote not captured yet.
What they say is different
Provider quote not captured yet.
Verbatim provider claims · not an independent assessment
Release & lifecycle
Availability applies to this exact identifier on xAI API.
- First API availability
- Not verified
- available
- Observed Sep 13, 2026