how much does Grok Build 0.1 cost?

$1.00/M input, $0.20/M cached, $2.00/M output (2x at 200k+ prompt tokens). you pay per run from your inference shell credits. no subscription is required.

how do I run Grok Build 0.1 via api?

call xai/grok-build-0-1 with the javascript or python sdk, the rest api, or `belt app run xai/grok-build-0-1` from a terminal. the api reference on this page lists every input.

who makes Grok Build 0.1?

Grok Build 0.1 is made by xai and runs on inference shell. every xai app is listed at https://inference.sh/apps/xai.

can my agent use Grok Build 0.1?

yes. agents call it as a tool through the inference shell mcp server (https://api.inference.sh/mcp), the belt cli or the sdk, and pay per run like you do.

what are the alternatives to Grok Build 0.1?

other chat apps on inference shell include DeepSeek V4.1 Flash 1017, Claude Fable 5.1 (Claude Code), Claude Haiku 5.5 (Claude Code), Claude Opus 5.5 (Claude Code). they run through the same api, so switching is a one-line change.

Grok Build 0.1

Grok Build 0.1 — xAI's agentic coding model. 256k context, reasoning, image input and tool use via the xAI Responses API. Direct API.

vision reasoning coding

run in browser →run via API run with your agent

maker: xai
category: chat
runs via: api, javascript and python sdk, belt cli, mcp
updated: 2026-10-13
price: $1.00/M input, $0.20/M cached, $2.00/M output (2x at 200k+ prompt tokens)

api reference

about

grok build 0.1 — xai's agentic coding model. 256k context, reasoning, image input and tool use via the xai responses api. direct api.

get an api key

create one in settings → api keys. the examples read it from INFERENCE_API_KEY.

bash

1export INFERENCE_API_KEY="inf_your_key"

1. calling the api

install the client

nothing to install. any http client works; the examples use curl, and jq to read responses. every response wraps its result in a data field.

run and get result

send "wait": true to hold the connection until the task finishes. without it the call returns right away with the task still running.

bash

12# "wait": true holds the connection until the task finishes.3# the response is {"data": {"id", "status", "status_text", "output", ...}}4curl -X POST https://api.inference.sh/apps/run \5  -H "Authorization: Bearer $INFERENCE_API_KEY" \6  -H "Content-Type: application/json" \7  -d '{8    "app": "xai/grok-build-0-1",9    "input": {},10    "wait": true11  }'

stream live updates

get real-time progress updates as the task runs. ideal for showing progress bars, partial results, or long-running tasks. send "stream": true and the response is a server-sent event stream that ends when the task does.

bash

12# "stream": true answers with server-sent events until the task finishes3curl -N -X POST https://api.inference.sh/apps/run \4  -H "Authorization: Bearer $INFERENCE_API_KEY" \5  -H "Content-Type: application/json" \6  -d '{7    "app": "xai/grok-build-0-1",8    "input": {},9    "stream": true10  }'

run in the background

start the task and get its id back right away, then check on it later. for long tasks, or when you'd rather be called back, see webhooks.

bash

1# without "wait" the call returns the task right away (status 1, "received")2TASK_ID=$(curl -s -X POST https://api.inference.sh/apps/run \3  -H "Authorization: Bearer $INFERENCE_API_KEY" \4  -H "Content-Type: application/json" \5  -d '{6    "app": "xai/grok-build-0-1",7    "input": {}8  }' | jq -r '.data.id')910# later: read its state. done when status is 10 (completed), 11 (failed) or 12 (cancelled)11curl -s https://api.inference.sh/tasks/$TASK_ID \12  -H "Authorization: Bearer $INFERENCE_API_KEY" | jq '.data | {status, status_text, output}'

2. authentication

the api uses api keys for authentication. see the authentication docs for detailed setup instructions.

3. files

file inputs are automatically handled by the sdk. you can pass local paths, urls, or base64 data.

automatic upload

pass urls directly or use data uris for inline content.

bash

1# pass URLs or data URIs as input values2curl -X POST https://api.inference.sh/apps/run \3  -H "Authorization: Bearer $INFERENCE_API_KEY" \4  -H "Content-Type: application/json" \5  -d '{6    "app": "xai/grok-build-0-1",7    "input": {8      "image": "https://example.com/image.png",9      "audio": "data:audio/mp3;base64,..."10    },11    "wait": true12  }'

manual upload

you can also upload files manually and use the returned url.

bash

1# 1. create the file: the response has an upload_url and the file's uri2FILE=$(curl -s -X POST https://api.inference.sh/files \3  -H "Authorization: Bearer $INFERENCE_API_KEY" \4  -H "Content-Type: application/json" \5  -d '{"files": [{"filename": "image.png", "content_type": "image/png"}]}')67# 2. PUT the bytes to upload_url8curl -X PUT "$(echo "$FILE" | jq -r '.data[0].upload_url')" \9  -H "Content-Type: image/png" \10  --data-binary @image.png1112# 3. pass the uri as an input value13echo "$FILE" | jq -r '.data[0].uri'

4. webhooks

get notified when a task completes by providing a webhook url. when the task reaches a terminal state (completed, failed, or cancelled), a POST request is sent to your url with the task result.

bash

1curl -X POST https://api.inference.sh/apps/run \2  -H "Authorization: Bearer $INFERENCE_API_KEY" \3  -H "Content-Type: application/json" \4  -d '{5    "app": "xai/grok-build-0-1",6    "input": {},7    "webhook": "https://your-server.com/webhook"8  }'

webhook payload

your endpoint receives a JSON POST with the task result:

json

1{2  "event": "task.completed",3  "timestamp": "2024-01-15T10:30:05Z",4  "data": {5    "id": "task_abc123",6    "short_id": "abc123",7    "status": 10,8    "status_text": "completed",9    "output": { ... },10    "created_at": "2024-01-15T10:30:00Z",11    "updated_at": "2024-01-15T10:30:05Z"12  }13}

eventstringtask.completed, task.failed or task.cancelled

timestampstringiso timestamp of the delivery

data.idstringtask id

data.short_idstringshort task id

data.statusnumberterminal status (10=completed, 11=failed, 12=cancelled, 13=rejected)

data.status_textstringthe status as a word: completed, failed or cancelled

data.outputobjecttask output (when completed)

data.errorstringerror message (when failed, omitted otherwise)

data.session_idstringsession id (when the task ran in a session, omitted otherwise)

data.created_atstringiso timestamp

data.updated_atstringiso timestamp

5. schema

input

textstring

text

default: ""

imagesarray

images

filesarray

files

attachmentsarray

attachments

contextarray

context

default: []

rolestring

chatmessagerole

default: "user"

options:"system""user""assistant""tool""injection""compaction""event"

reasoningstring

reasoning

tool_call_idstring

tool call id

system_promptstring

system prompt

default: "you are a helpful assistant that can answer questions and help with tasks."

context_sizeinteger

the context size for the model.

default: 256000

temperaturenumber

temperature

default: 0.7min:0max:1

top_pnumber

top p

default: 0.95min:0max:1

top_kinteger

top k

min_pnumber

min p

frequency_penaltynumber

frequency penalty

presence_penaltynumber

presence penalty

repetition_penaltynumber

repetition penalty

seedinteger

seed

stoparray

stop

max_tokensinteger

max tokens

default: 64000

reasoning_effortstring

reasoningeffortenum

default: "none"

options:"low""medium""high""none"

reasoning_max_tokensinteger

reasoning max tokens

toolsarray

tools

tool_choiceobject

toolchoice

response_formatobject

responseformat

output

noticestring

set when xai rejected the request under its usage guidelines.

reasoningstring

reasoning

reasoning_stateobject

reasoning state

responsestring

response

tool_callsarray

tool calls

usageobject

llmusage

other chat apps

DeepSeek V4.1 Flash 1017

melious/deepseek-v4-1-flash-1017

$0.341/M input, $0.0341/M cached input, $1.364/M output

Claude Fable 5.1 (Claude Code)

anthropic/claude-code-fable-5-1

from $0.00000277/sec

Claude Haiku 5.5 (Claude Code)

anthropic/claude-code-haiku-5-5

from $0.00000277/sec

Claude Opus 5.5 (Claude Code)

anthropic/claude-code-opus-5-5

from $0.00000277/sec

Claude Sonnet 5.5 (Claude Code)

anthropic/claude-code-sonnet-5-5

from $0.00000277/sec

more from xai

Grok Speech to Text

xai/grok-stt

$0.10/hr of audio for files, $0.20/hr for realtime

Grok Imagine Video 1.5

xai/grok-imagine-video-1-5

$0.08/sec 480p, $0.14/sec 720p, $0.25/sec 1080p; $0.01/input image

Grok Imagine Image 2.0

xai/grok-imagine-image-2-0

$0.04/img low 1k, $0.06/img low 2k, $0.06/img med 1k, $0.08/img med 2k; $0.01/source img (edits)

Grok 4.7

xai/grok-4-7

$2.00/M input, $0.50/M cached, $6.00/M output (2x at 200k+ prompt tokens)

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from the blog

Grok Build 0.1

api reference

about

get an api key

1. calling the api

install the client

run and get result

stream live updates

run in the background

2. authentication

3. files

automatic upload

manual upload

4. webhooks

5. schema

input

output

other chat apps

more from xai

new models

ready to run Grok Build 0.1?