xAI | Grok 4.20 0309 (Reasoning)

Last updated: 12 days ago

Model By: xAI

Grok 4.20 is reasoning model from xAI with industry leading speed and agentic tool calling capabilities. 2,000,000 token context window.

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Latency

31817ms

Throughput

Total Context

2000K

Max Output

Input Price

$2/M

Output Price

$6/M

API Parameters & Capabilities

Model Type

Parameter Size

Input Modality

Output Modality

Inference Speed

91.171 tokens/s

Success Rate

Peak Concurrency

Release Date

5/15/2026

Integration & Pricing Details

Pricing Mode

Free Tier

Supported Languages

SDK

API Key Acquisition

Rate Limit

User Reviews

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Review Title

Overall Rating5.0

API Usability5.0

Stability5.0

Speed5.0

Documentation Quality5.0

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FAQ & Compliance

What use cases is this API best for?

It is well-suited for chatbots, code generation, content summarization, and enterprise knowledge Q&A scenarios requiring strong reasoning.

How does the pricing work?

Pricing is based on token usage for both input and output. Check the pricing section for detailed rates.

How does authentication work?

This API uses API key authentication. You can generate and manage your API keys in the developer dashboard.

Are there rate limits?

Yes, there are rate limits depending on your subscription plan. Free tier has lower limits compared to paid plans.