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Grok 3 Fast Beta


Grok 3 Fast Beta is xAI logoxAI's language model with a 131K context window, available from 3 providers, starting at $3.00 / 1M input and $15.00 / 1M output. A high-throughput variant of Grok 3 optimized for speed while retaining strong enterprise capabilities in coding, extraction, and domain knowledge.
Spec
Canonical IDxai-grok-3-fast
TypeLanguage
StatusActive
CreatorxAIxAI
Providers
Context Window131K tokens
Input ModalitiesText
Output ModalitiesText
Release Date · 1 year ago

Capabilities

Input1/5
Text
Image·
Audio·
Video·
PDF·
Output1/5
Text
Image·
Audio·
Video·
Embedding·
Capabilities2/13
Reasoning·
Adaptive Reasoning·
Function Calling
Parallel Function Calling·
Structured Outputs·
Native JSON Schema·
Web Search
URL Context·
Computer Use·
Code Execution·
File Search·
Prompt Caching·
Assistant Prefill·

Pricing by Provider

ProviderStandardBatch
Input
$ / 1M
Output
$ / 1M
Cache Read
$ / 1M
Input
$ / 1M
Output
$ / 1M
Cache Read
$ / 1M
xAI logo
xAI
grok-3-fast-latest
$3.00$15.00$0.750$1.50$7.50$0.375
Oracle Cloud (OCI) logo
Oracle Cloud (OCI)
xai.grok-3-fast
$5.00$25.00N/A
Vercel AI Gateway logo
Vercel AI Gateway
xai/grok-3-fast
$5.00$25.00$1.25

Cost Calculator

Preset:
Compares every provider & tier in USD

Versions

VersionReleasedContextInput / 1MOutput / 1MStatus
Grok 4.20 Multi-Agent2.0M$2.00$6.00Available
Grok 4.20 Multi Agent Beta2.0M$2.00$6.00Available
Grok 4 20 Non-Reasoning2.0MAvailable
Grok 4 20 Reasoning2.0MAvailable
Grok 4 20131K$3.00$15.00Available
Grok 4.1 Fast2.0M$0.200$0.500Available
Grok 4.1 Fast Non-Reasoning2.0M$0.200$0.500Available
Grok 4.1 Fast Reasoning2.0M$0.200$0.500Available
Grok 4 Non-Reasoning2.0M$2.00$6.00Available
Grok 4 Reasoning2.0M$2.00$6.00Available
Grok 3 Fast Beta131K$3.00$15.00Current

Model IDs