How much do xAI models cost?

Current per-million-token input and output API prices for each xAI model are listed here and linked to xAI's official pricing page, which is the source of truth as prices change.

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Vikshy Models · xAI

xAI models: pricing, context & what each is for

Q: What is xAI's most capable model?

xAI's highest-tier catalogued model, with its context window, API pricing, and intended use, is listed on this page, alongside every other xAI model.

xAI has 8 models in the Vikshy catalogue, spanning Grok 4.5, Grok 4.3, Grok 4.20, Grok 4.1 and more, compared side by side on context window, API pricing, modality, and what each is best for, every model linked to xAI's official docs and pricing. Prices are per million tokens and can change, so the linked pricing page is the source of truth. For how xAI ranks against other labs, see its Vikshy Score. Updated 2026-07-21.

ModelContextInput /MOutput /MModalityAccess

Grok 4.5Frontier

Hard coding and agent tasks. Cached input is $0.50 per 1M.

500K

$2.00

$6.00

Multimodal

API + Grok app

Docs Price

Grok 4.3Flagship

General production use. Canonical chat-model alias on the docs.

$1.25

$2.50

Multimodal

API + Grok app

Docs Price

Grok 4.20Reasoning

Multi-agent and long-horizon jobs.

$1.25

$2.50

Multimodal

API

Docs Price

Grok Build 0.1Balanced

Codebase-scale software work.

256K

$1.00

$2.00

Text

API + Grok app

Docs Price

Grok ImagineBalanced

Creative and media work.

N/A

see pricing

Image

API + Grok app

Docs Price

Grok 4.1 FastEfficient

High-volume, cost-sensitive tasks.

$0.20

$0.50

Multimodal

API

Docs Price

Grok 4Legacy

Older integrations still pointing at Grok 4.

256K

$3.00

$15.00

Multimodal

API

Docs Price

Grok 3Legacy

Legacy apps built on Grok 3.

131K

$3.00

$15.00

Text

API

Docs Price

xAI's Vikshy Score →All models, compared →What is the Vikshy Score? →

xAI models, common questions

What is xAI's most capable model?

Its highest-tier model in the catalogue is Grok 4.5 (Frontier tier), built for hard coding and agent tasks. cached input is $0.50 per 1m.

Which xAI model is cheapest?

By API input price, Grok 4.1 Fast is the lowest at $0.20 per million input tokens ($0.50 output).

What is the largest context window xAI offers?

Grok 4.20 has the largest listed context window, up to 2M tokens.

Does xAI offer open-weight models?

No. xAI's catalogued models are offered through its API and apps, not as downloadable open weights.