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Ofox

Grok 4.20 (Reasoning) API

Ofox
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 $4.00/1M input and $12.00/1M output tokens, native tool calling support. Access Grok 4.20 (Reasoning) via the Ofox API with up to 128K output tokens.

Capabilities

Input Modalities

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Output Modalities

text
Reasoning
Yes
Structured Output
Yes
Tool Use
Yes
WeightsClosed
Temperature
Adjustable
Attachment
Supported
Limits
Context Window
2.0M

Tokens

Input Limit
2.0M

Tokens

Max Output
128K

Tokens

Pricing

Standard (per 1M tokens)

Input
$4.00
Output
$12.00

Caching (per 1M tokens)

Read
$0.40
Frequently Asked Questions

Grok 4.20 (Reasoning) by Ofox costs $4.00 per 1M input tokens and $12.00 per 1M output tokens. Cached reads cost $0.40 per 1M tokens.

Model Details
ID
x-ai/grok-4.20
Provider
Ofox
Family
grok
Release Date
Mar 9, 2026
Knowledge Cutoff
N/A
API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
OFOX_API_KEY
API Base URL
https://api.ofox.ai/v1
Documentation