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EARLY ACCESSCODING MODEL256K CONTEXTTEXT + IMAGE INPUTPROMPT CACHING

Grok Build 0.1 API Pricing

Grok Build 0.1 is xAI's fast coding model for agentic coding workflows: $1/M input, $2/M output, and $0.20/M cached input. xAI labels it early access and lists aliases for Grok Code Fast routes.

Input - per 1M tokens
$1.00/M
Base token price standard
Output - per 1M tokens
$2.00/M
Output tokens standard
Cached input
$0.20/M
Cached input tokens -80%
Effective - agentic blend
$0.48/M
92/8 split - 82% cache
§ 01 / TERMINAL

Run the numbers.

Live calculator pre-loaded with Grok Build 0.1 rates from docs.x.ai. xAI notes higher context pricing can apply above the 200K context window, while the model page lists a 256K context window.

$ /mo
Workload split
Prompt cache hit rate
Tokens you can process
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Words equivalent (English)
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Effective rate
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Open full calculator (all models · share URL · CSV) →
§ 02 / SCENARIOS

Real-world presets.

CODING AGENT

Repo edit iteration

$0.055/task
90k cache-heavy in / 12k out~1,818 units/$100
TEST FIX

CI failure debug

$0.045/fix
65k in / 8k out~2,242 units/$100
MIGRATION

Module rewrite

$0.080/module
140k cache-heavy in / 16k out~1,246 units/$100
VISION CODE

Screenshot-to-code pass

$0.039/pass
45k image+text in / 6k out~2,564 units/$100
§ 03 / TAPE

Price history.

Grok Build 0.1 is listed at $1/M input, $0.20/M cached input, and $2/M output.

Input · $1/M
Output · $2/M
Cached · $0.20/M
MAY 19 Launched at 1/M input and 2/M output in AI//COST's tracked tierJUN 04 Verified unchanged against the official vendor pricing page
§ 04 / TOKENIZER

Paste text. See tokens. See cost.

Estimate · grok-tokenizer-estimate · ≈3.85 chars/token Auto-counts as you type

This is a chars-per-token approximation, not a real tokenizer. Actual tokens vary by language, code density, and tool-call overhead — counts are typically ±10–20% off for English prose, more for code or non-Latin scripts. For exact billing, use the vendor's official tokenizer.

Characters 396
Words 63
Tokens (estimated) 103 tokens
Cost as input · uncached $0.000103 USD
Cost as output · uncached $0.000206 USD
Cost as cached input $0.000021 USD
§ 05 / SHELF

Up against the shelf.

All models →
Model Input /M Output /M Effective blended Context Best for
Grok Build 0.1 Current $1.00 cache $0.20 $2.00 $0.48 agentic 92/8 256K Fast agentic coding
Grok 4.3 $1.25 cache $0.20 $2.50 $0.56 general Grok flagship 1M General reasoning and tools
Grok 4.20 Multi-Agent $1.25 cache $0.20 $2.50 $0.56 longer multi-agent tier 1M Deep research multi-agent loops
Gemini 3.5 Flash $0.25 cache $0.03 $1.50 $0.18 cheaper multimodal rival 1M Google agentic coding loops

Frequently asked.

Practical Grok Build 0.1 pricing questions, with early-access status and aliases separated from token math.

Q · 01 What is Grok Build 0.1 priced at? +
xAI lists grok-build-0.1 at $1/M input, $0.20/M cached input, and $2/M output.
Q · 02 Is Grok Build 0.1 generally available? +
xAI's release notes describe it as an early-access fast coding model. Treat availability and limits as less stable than the main Grok 4.3 route.
Q · 03 What is the context window? +
The model page lists a 256,000 token context window. xAI also notes that requests exceeding the 200K context window can be charged at different higher-context rates.
Q · 04 Does it support image input? +
Yes. xAI's model page lists modalities as text and image input with text output. For AI//COST taxonomy that is tracked as text + vision + code.
Q · 05 What aliases map to this model? +
xAI lists aliases including grok-code-fast-1, grok-code-fast, and grok-code-fast-1-0825 on the Grok Build 0.1 model page.
Q · 06 How does it compare with Grok 4.3? +
Grok Build 0.1 is cheaper than Grok 4.3 for coding loops: $1/$2 versus $1.25/$2.50. Grok 4.3 remains the general-purpose recommendation for non-coding work.
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Reviewed by Yaroslav Vikhariev Founder - AI//COST - Pricing pulled daily from docs.x.ai - Last verified Jun 04, 2026
Methodology Report a correction More by Y.V.