Is the xAI API compatible with OpenAI clients?

Yes. xAI offers an OpenAI-compatible endpoint, so most OpenAI client libraries work by changing the base URL and key.

Can I use the fast Grok variant through the API?

Not for the current model. xAI offers the fast variant of its newest Grok only inside Cursor and Grok Build; on the public API you use the standard model.

Model & API platforms

xAI (Grok API) pricing

技術チーム向け

xAI (Grok API) is priced per use rather than per month; the rate for each option is in the table below. Checked 2026年9月22日 against the official pricing page.

Grok 4.7は100万トークンあたり$2/$6、コンテキストは500K。ClaudeやGPTのフラッグシップより安い価格でフロンティア級のナレッジワークを実現します。大量処理では最も安い選択肢ではありません。xAIによるとTerminal-Bench 4.0で38%を記録し、推論トークンを多く消費するため、タスクあたりのコストは料金表を上回ります。

xAI (Grok API)のサイトを見る Report a price change

Our take

Score 3.5 out of 5How we score

The xAI API gives you Grok models with a large context window at prices below the Claude and GPT flagships. It is a solid option for knowledge work over long documents; it is not the cheapest API per token.

Plans and prices

xAI (Grok API) plans, checked 2026年9月22日. Official pricing page 価格は参考値であり、変更される場合があります。必ず提供元のサイトでご確認ください。
Plan	Price	What you get
grok-4-7Our pick	Usage-based$2/1M input, $6/1M output for prompts under 200k tokens; $4/$12 above 200k; Grok 4.6 still served at the same price	500K context OpenAI-compatible endpoint Tool calls Reasoning effort low/medium/high/xhigh Fast variant only in Cursor and Grok Build

Pick this tier: grok-4-7

The current Grok model is the main option on the API; use the standard variant unless latency really matters.

What works

Large context window
Lower per-token price than the leading flagships
OpenAI-compatible endpoint
Tool calls supported

What to watch

The fast variant is not on the public API
Fewer model sizes than the biggest providers
Not the lowest-cost option for bulk work

Skip it if

You need the lowest cost per token
You are not building with an API
You want a consumer chat subscription

最適な用途

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xAI (Grok API) pricing questions

How much does xAI (Grok API) cost in 2026?: xAI (Grok API) is priced per use rather than per month; the rate for each option is in the table below. Checked 2026年9月22日 against the official pricing page.
Is the xAI API compatible with OpenAI clients?: Yes. xAI offers an OpenAI-compatible endpoint, so most OpenAI client libraries work by changing the base URL and key.
Can I use the fast Grok variant through the API?: Not for the current model. xAI offers the fast variant of its newest Grok only inside Cursor and Grok Build; on the public API you use the standard model.

Reviewed 2026年9月22日 by the Dapols team. Report a price change

このツールに関する当社のエビデンス

カタログステータス: 推奨 — プランの主要な選択肢になり得ます
最終価格確認日: 2026年9月22日
最終機能レビュー日: 2026年8月13日
エビデンスの信頼度: 中 — 検証済みだが、ベンダーはプランを頻繁に変更する
公式ドキュメント: ベンダーのドキュメントを読む

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