grok-3-mini-fast-latest
Last Updated on: Dec 22, 2025
grok-3-mini-fast-latest
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What is grok-3-mini-fast-latest?
Grok 3 Mini Fast is xAI’s most recent, low-latency variant of the compact Grok 3 Mini model. It maintains full chain-of-thought “Think” reasoning and multimodal support while delivering faster response times. The model handles up to 131,072 tokens of context and is now widely accessible in beta via xAI API and select cloud platforms.
Who can use grok-3-mini-fast-latest & how?
  • Developers & Engineers: Embed fast, transparent reasoning into chatbots or interactive pipelines.
  • Students & Educators: Provide on-demand step-by-step logic for math, coding, and analysis.
  • Enterprises & SMEs: Deploy reasoning-capable AI affordably for live Q&A or transaction flows.
  • Content & Tooling Teams: Automate structured reasoning tasks—debugging, summaries, workflows.
  • Researchers: Benchmark transparent chain-of-thought performance in real-world, low-latency settings.

How to Use Grok 3 Mini Fast (Latest)?
  • Access via xAI API or Oracle Cloud: Use model ID `grok-3-mini-fast-beta` in supported regions (e.g. US Midwest).
  • Include Prompts with “Think”: Use reasoning prompts or set `"reasoning_effort": "high"` to trigger chain-of-thought output.
  • Send Multimodal Inputs: Accepts text (and, where supported, images) up to 131,072 tokens.
  • Experience Faster Output: Optimized infrastructure yields high throughput (210 tokens/sec) with quick initial response (0.32 s).
  • Manage Cost: Input tokens $0.60/M; output tokens $4.00/M—reflecting performance tier.
What's so unique or special about grok-3-mini-fast-latest?
  • Low-Latency Reasoning: Delivers real-time chain-of-thought insights using fast serving infrastructure.
  • Feature-Parity with Mini: Maintains same reasoning quality, context window, and multimodal support as standard Mini.
  • Large Context Scope: 131K-token window enables in-depth document, code, or conversation analysis.
  • Optimized for Deployment: Ideal for interactive apps needing fast, interpretable AI.
  • Premium Pricing Tier: Higher costs reflect the infrastructure advantages.
Things We Like
  • Transparent chain-of-thought at low latency
  • Same powerful reasoning in compact form
  • High throughput (~210 tokens/sec) and fast start (~0.32 s)
  • Large context window retained
  • Integration via existing API clients or Oracle deployment
Things We Don't Like
  • More expensive: $0.60/$4.00 per million tokens vs standard Mini price
  • Still in beta—features and cost may change
  • Lacks “Big Brain” deep reasoning—only available in full flagship model
Photos & Videos
Screenshot 1
Pricing
Freemium

Free Tier

$ 0.00

Limited access to Thinking
Limited access to DeepSearch
Limited access to DeeperSearch

Super Grok

$30/month

More Grok 3 - 100 Queries / 2h
More Aurora Images - 100 Images / 2h
Even Better Memory - 128K Context Window
Extended access to Thinking - 30 Queries / 2h
Extended access to DeepSearch - 30 Queries / 2h
Extended access to DeeperSearch - 10 Queries / 2h

API

$0.60/$4.00 per 1M tokens

Input - $0.60/M
Cached Input - $0.15/M
Output - $4.00/M
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FAQs

A beta low-latency version of Grok 3 Mini offering visible chain-of-thought reasoning with optimized performance and context capacity.
Use grok-3-mini-fast-beta via xAI’s API or Oracle’s Generative AI service in supported regions.
Yes—it outputs the same reasoning traces as Grok 3 Mini, only delivered faster.
It streams responses at ~210 tok/s and approximately 0.32 s to the first token.
$0.60 per million input tokens and $4.00 per million output tokens—reflecting high-performance delivery.

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