Grok 4.20

Grok 4.20 is a high-performance model with industry-leading speed and agentic tool calling capabilities. It combines the lowest hallucination rate on the market with strict prompt adherence, delivering consistently precise and truthful responses.

At a glance

• Modalities: text, image → text
• Context window: 1,000,000 tokens
• Model name: grok-4.20-0309-reasoning
• Aliases: grok-4.20-reasoning-latest, grok-4.20, grok-4.20-reasoning, grok-4.20-0309, grok-4.20-beta-0309-reasoning, grok-4.20-beta, grok-4.20-beta-0309, grok-4.20-beta-latest, grok-4.20-beta-latest-reasoning, grok-4.20-beta-reasoning, grok-4.20-experimental-beta-0304-reasoning, grok-4.20-experimental-beta-0304, grok-4.20-experimental-beta-reasoning-latest, grok-4.20-experimental-beta-latest, grok-4.20-reasoning-gv2

Capabilities

• Function calling: Yes
• Structured outputs: Yes
• Reasoning: Yes

Pricing

Type	< 200k prompt tokens (per 1M tokens)	≥ 200k prompt tokens (per 1M tokens)
Input	$1.25	$2.50
Cached input	$0.20	$0.40
Output	$2.50	$5.00

Requests whose prompt reaches 200k tokens are billed at the higher rate for all tokens in the request.

Batch API requests are billed at a 20% discount to standard rates.

Rate limits

Limit	Value
Requests per second	37
Tokens per minute	10,000,000

Regions

Available in: us-east-1, us-west-2