Grok 4.20 Reasoning API
About
Build advanced reasoning agents with Grok 4.20 Reasoning, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $1.25/1M input and $2.50/1M output tokens, native tool calling support. Access Grok 4.20 Reasoning via the Vercel AI Gateway API with up to 2.0M output tokens.
Capabilities
Input Modalities
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Output Modalities
text
Limits
Context Window
2.0M
Tokens
Input Limit
2.0M
Tokens
Max Output
2.0M
Tokens
Pricing
Standard (per 1M tokens)
Input
$1.25
Output
$2.50
Caching (per 1M tokens)
Read
$0.20
Frequently Asked Questions
Grok 4.20 Reasoning by Vercel AI Gateway costs $1.25 per 1M input tokens and $2.50 per 1M output tokens. Cached reads cost $0.20 per 1M tokens.
Model Details
ID
spacexai/grok-4.20-reasoning
Provider
Vercel AI GatewayFamily
grok
Release Date
Mar 10, 2026
Knowledge Cutoff
N/A
API Integration