- Developers & Engineers: Ideal for live chatbots, customer support systems, interactive apps, and pipelines that must minimize lag.
- Stems & Coding Teams: Use in prompt-heavy reasoning or debugging flows where speed matters.
- Enterprises: Streamline high-throughput tasks—like document parsing or transactional Q&A.
- Researchers & Analysts: Obtain rapid experimental results without sacrificing reasoning ability.
- Startups & Scaleups: Benefit from flagship performance with faster responses in user-facing experiences.
How to Use Grok 3 Fast?
- Call via xAI API: Use `grok-3-fast` or `grok-3-fast-beta` model IDs for OpenAI-compatible calls.
- Send Contextual Prompts: Input text and optional images (multimodal) up to 131K tokens.
- Receive Faster Outputs: Enjoy the same reasoning, coding, and multimodal responses as Grok 3, but with reduced latency.
- Monitor Usage: Priced at approximately $5 per million input tokens and $25 per million output tokens.
- Integrate Seamlessly: Compatible with OpenAI-style SDKs and prompt frameworks for easy deployment.
- Speed with Full Feature Parity: Same model architecture and output quality as Grok 3, but delivers them faster.
- Large Context Window: Supports 131K tokens—enabling long-form tasks with no performance trade-offs.
- Optimized Serving: Infrastructure tuned for ultralow latency performance without sacrificing reasoning power.
- OpenAI-Compatible API: Easily plugs into existing systems using familiar interfaces.
- Enterprise-Grade Capabilities: Suited for high-scale business use cases—chat, automation, code, and document workflows.
- Same output quality as flagship model, delivered faster
- Supports very long context for detailed tasks
- Integrates smoothly via OpenAI-style API
- Ideal for high-throughput or low-latency enterprise apps
- Maintains multimodal and reasoning features
- Higher cost versus standard Grok 3—$5/$25 vs $3/$15 per million tokens
- No visible chain-of-thought stream (“Think”)—use Grok 3 Mini for transparent reasoning paths
- “Big Brain” mode not available in Fast tier—reserved for flagship models
Free Tier
$ 0.00
Limited access to DeepSearch
Limited access to DeeperSearch
Super Grok
$30/month
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
$5/$25 per 1M tokens
Cached Input - $1.25/M
Output - $25.00/M
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Editorial Note
This page was researched and written by the ATB Editorial Team. Our team researches each AI tool by reviewing its official website, testing features, exploring real use cases, and considering user feedback. Every page is fact-checked and regularly updated to ensure the information stays accurate, neutral, and useful for our readers.
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