xAI (Grok)

Grok 3

The original Grok 3 reasoning model from xAI's first-party API.

Active
Tool callingCan invoke external tools and APIs (function calling) mid-response.Structured outputCan return JSON or schema-constrained responses instead of free text.ReasoningUses extended thinking / chain-of-thought for harder multi-step problems.Effort controlLets you dial thinking depth (low / medium / high) to trade cost for quality.Fine-tuningSupports training a custom variant on your own data (vendor fine-tune API or self-hosted open weights).

Source: xAI API docs, xAI console

Price per 1M tokens
$3 in / $15 out
Context window131,072
ModalitiesText → Text

Pricing

Every billing leg from the live catalog, in USD per 1M tokens.

Billing legRate
Input$3 / M
Output$15 / M

Cost calculator

Billing-grade math over the rate card above, including the thinking tokens most estimates miss.

Hidden reasoning tokens bill as output. 1.0x = thinking off. Medium-effort reasoning typically lands near 3x; heavy reasoning runs 6x to 8x. Set it to match your workload.

Estimated monthly cost
$1.5K
at current list prices
Fresh input$600
Output incl. thinking$900
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Provider

Where this model runs, and what it charges.

PlatformInput / MOutput / MBatchAccess
xAI
$3$15—First-party API

Price history

Has this model gotten cheaper or more expensive?

No changePriced at $3 / $15 per 1M since April 20, 2026.

More from xAI (Grok)

Other models from the same provider.

Grok 4.5
xai/grok-4.5
$2 / $6 in / out per 1M
Grok 4.3
xai/grok-4.3
$1.25 / $2.5 in / out per 1M
Grok 4.20
xai/grok-4.20
$2 / $6 in / out per 1M
Grok 3 Mini
xai/grok-3-mini
$0.3 / $0.5 in / out per 1M

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Rates are generated from SuperPenguin's live pricing catalog.