Grok API Pricing 2026: Grok 4.3 and Grok Build 0.1 Costs

xAI’s current API lineup is centered on Grok 4.3 and the coding-focused Grok Build 0.1. Older Grok 3, Grok 3 Mini, Grok 4, and Grok 4 Fast identifiers were retired or converted into aliases on May 15, 2026. They should not be used as current pricing anchors.

Current Grok API Prices

Model	Input / 1M	Cached Input / 1M	Output / 1M	Context	Best Fit
Grok 4.3	$1.25	$0.20	$2.50	1M	General agents, reasoning, multimodal tasks
Grok Build 0.1	$1.00	$0.20	$2.00	256K	Coding and software-building agents

The important change is output pricing. Grok 4.3 costs far less than the old Grok 4 and Grok 3 headline price of $3/$15.

Monthly Cost Examples

Standard pricing, no cache hits:

Daily Usage	Grok 4.3	Grok Build 0.1
100K input + 50K output	$7.50/month	$6.00/month
1M input + 500K output	$75/month	$60/month
10M input + 5M output	$750/month	$600/month

For repeated system prompts, tool schemas, or repository context, cached input at $0.20/M materially lowers the bill.

Which Model Should You Use?

Choose Grok 4.3 when you need xAI’s current general-purpose model, multimodal input, or a 1M context window.

Choose Grok Build 0.1 when the workload is primarily code generation, repository changes, debugging, or software-building agents.

Do not start new integrations on Grok 3 or Grok 4 aliases. Their historical price and specifications no longer describe the current request path.

Use the AI Model Pricing Calculator to compare current USD-priced models.

Official sources checked: xAI models, Grok 4.3, and May 15 retirement notice.