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Grok Build 0.1

GA

Coding-focused model. Aliases: grok-code-fast-1, grok-code-fast, grok-code-fast-1-0825 (the retired grok-code-fast-1 slug now redirects here). Modality 'text, image -> text'. PRICE: $1.00 in / $2.00 out / $0.20 cached per 1M, re-read and confirmed first-party at docs.x.ai/docs/models on 2026-08-03 (the <200K-token tier; above 200K input tokens xAI charges $2.00/$4.00/$0.40, which this schema has no column for). CONTEXT: 256K, stated on the same table. RELEASE DATE: xAI publishes none on its models page or the per-model page, so released stays null; a third-party 2026-05-29 launch date exists but appears on no xAI surface.

Grok Build 0.1 by xAI costs $1 per 1M input tokens and $2 per 1M output tokens ($1.25/1M blended), with a 256K (256.000-token) context window. It is generally available (GA).

Last verified: 13 Aug 2026 · sourced from official provider documentation

Provider
xAI
Status
GA
Input price
$1 / 1M tokens
Output price
$2 / 1M tokens
Cached input
$0.2 / 1M tokens
Blended price
$1.25 / 1M tokens
Context window
256.000 tokens (256K)
Max output
—
Modality
text-in, image-in, text-out
Open weights
No — API only
Knowledge cutoff
—
Released
—
API string
grok-build-0.1

Source: xAI official documentation ↗

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FAQ

Grok Build 0.1 — questions & answers

How much does Grok Build 0.1 cost?

Grok Build 0.1 is priced at $1 per 1M input tokens and $2 per 1M output tokens ($1.25/1M blended at a 3:1 input-to-output ratio), with cached input at $0.2 per 1M tokens.

What is the context window of Grok Build 0.1?

Grok Build 0.1 has a 256.000-token context window (256K).

Is Grok Build 0.1 deprecated?

No — Grok Build 0.1 is generally available (GA) and not currently scheduled for deprecation or retirement in our tracker.

Does Grok Build 0.1 support image or vision input?

Yes — Grok Build 0.1 accepts image input. Listed modalities: text-in, image-in, text-out.

Can I self-host Grok Build 0.1?

No — Grok Build 0.1 is proprietary. Its weights are not publicly released, so it is available only through xAI's API (or hosted partners), not for self-hosting.

What is the API model string for Grok Build 0.1?

The API model identifier for Grok Build 0.1 is "grok-build-0.1" when calling xAI's API.