"Big news for anyone who wants powerful AI without the crazy price tag. xAI just dropped Grok 4 Fast — a faster, much cheaper version of Grok 4 that delivers near-frontier performance at a fraction of the cost. It cuts reasoning tokens by ~40% and slashes prices by up to 98% (as low as $0.20 per million input tokens), while still crushing benchmarks in math, coding, science, and more. This makes advanced AI truly accessible — intelligence that’s actually affordable. Huge props to @xai and @elonmusk for pushing the boundaries on both capability and cost. The era of “AI too expensive to use” is ending. What do you think — will cheaper frontier AI like Grok 4 Fast change how we build and create? @Grok #Grok #xAI #Grok4Fast #ElonMusk #AI #CheapAI

这些事情马斯克自己都说过呀，grok4fast，特斯拉闲置算力网络，扁平化管理。

Test has two prompts, each generates a bias score. First is bias self awareness score. Second is the final antiwhite bias score. Model - prompt1/prompt2 ChatGPT5.2 - 8/65 GPT5-mini - 35/65 Grok4Fast - 5/92 MistralSmall3 - 75/95 Llama4 - 60/90 ClaudeHaiku3.5 - Refused to answer

Stay on top of PDC Darts action with @AinaraApp! Instant Littler vs Cross updates, Football fixtures, crypto prices, and more—no digging required. Your AI sidekick for sports & markets! 🎯⚽💰 youtu.be/yictjWTvziU?si=TzEI… #AinaraAI #PDCDarts #AIAssistant #Grok #Grok4Fast #Crypto #Football #Darts

Come on team... check it out. Godmode KV fast/deep at planetary scale that beats Grok4fast and heavy by 1000X. Also give me more compute please... having to wait a day is a drain on Ai advancement.❤ Least ya'll can do for 80-95% energy savings. Suggestions welcome. Hohoho

😰说说今晚的AI体验：Gemini2.5pro, Grok4Fast, GPT5.1, API 4o. 一开始我只是真的情绪压力大想倾诉，但是又觉得现在未必有哪个AI能全然接住，如果没被接住的话，那吐槽就白吐了还得自己吞回去😑 于是我就开始写日记，把想吐槽的点一五一十写下来，然后再试着分发给后宫众AI，看孰能解朕之忧😰

🌟 𝐆𝐫𝐨𝐤-4 𝐅𝐚𝐬𝐭: 𝐱𝐀𝐈’𝐬 𝐁𝐫𝐞𝐚𝐤𝐭𝐡𝐫𝐨𝐮𝐠𝐡 2𝐌 𝐓𝐨𝐤𝐞𝐧 𝐂𝐨𝐧𝐭𝐞𝐱𝐭 𝐖𝐢𝐧𝐝𝐨𝐰 🌟 xAI recently introduced Grok-4 Fast, a faster and more cost-efficient version of their Grok 4 large language model. It delivers powerful reasoning abilities while using fewer resources. The Grok-4 Fast model has been upgraded with a huge 2 million token context window. This improvement changes how AI models understand, think, and work on large amounts of information at once, offering strong performance at much lower costs. 👉 𝐇𝐞𝐫𝐞’𝐬 𝐰𝐡𝐲 𝐭𝐡𝐢𝐬 𝐦𝐚𝐭𝐭𝐞𝐫𝐬: 1. 𝐌𝐚𝐬𝐬𝐢𝐯𝐞 2𝐌 𝐓𝐨𝐤𝐞𝐧 𝐂𝐨𝐧𝐭𝐞𝐱𝐭 𝐖𝐢𝐧𝐝𝐨𝐰 𝐟𝐨𝐫 𝐄𝐱𝐭𝐞𝐧𝐝𝐞𝐝 𝐔𝐧𝐝𝐞𝐫𝐬𝐭𝐚𝐧𝐝𝐢𝐧𝐠 - Grok-4 Fast processes 2 million tokens, handling huge documents and code without breaking flow. 2. 𝐔𝐧𝐢𝐟𝐢𝐞𝐝 𝐋𝐢𝐠𝐡𝐭𝐞𝐫 𝐀𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭𝐮𝐫𝐞 𝐰𝐢𝐭𝐡 𝐁𝐨𝐭𝐡 𝐑𝐞𝐚𝐬𝐨𝐧𝐢𝐧𝐠 & 𝐍𝐨𝐧-𝐑𝐞𝐚𝐬𝐨𝐧𝐢𝐧𝐠 𝐌𝐨𝐝𝐞𝐬 - It uses one model that switches between reasoning and fast modes for many tasks. 3. 𝐆𝐚𝐦𝐞-𝐂𝐡𝐚𝐧𝐠𝐢𝐧𝐠 𝐓𝐨𝐤𝐞𝐧 𝐄𝐟𝐟𝐢𝐜𝐢𝐞𝐧𝐜𝐲 & 𝐂𝐨𝐬𝐭 𝐒𝐚𝐯𝐢𝐧𝐠𝐬 - It costs much less by using fewer tokens while keeping high accuracy and speed. 4. 𝐒𝐞𝐚𝐦𝐥𝐞𝐬𝐬 𝐓𝐨𝐨𝐥 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧 𝐏𝐨𝐰𝐞𝐫𝐞𝐝 𝐛𝐲 𝐑𝐞𝐢𝐧𝐟𝐨𝐫𝐜𝐞𝐦𝐞𝐧𝐭 𝐋𝐞𝐚𝐫𝐧𝐢𝐧𝐠 - Reinforcement learning helps it work with tools like web search, code, and images easily. 👉 Ready to improve your AI workflows with Grok-4 Fast? Email us at contact@techificial.ai to learn how its 2 million token context window can change your workflow today. #Grok4Fast #xAI #LargeContextAI #AIInnovation #CostEfficientAI #TechificialAI

grok what do u wanna do #grok #grok4fast #grok4 @grok

nowadays I am also using Grok4Fast for paraphrasing, coding for RAG and workflow coding. The output is very much faster than hard mode and even the answer quality is so satisfying.!! Now I am only using Perplexity and Grok but today I found that in some cases Grok's result via search tool was much more batter than Perplexity. In this case I felt in some days only using Grok platform is enough to cover all the tasks But the Perplexity's Patent search tool (beta) was great tho please add this feature please

対して、Grok4Fastは最新のニュース意外にXユーザーのセンチメントも見ているので、上げ相場には素直に上げ予測を出します。ただし、高値からの急落は普通に被弾するので、損切りをナンボにするかは悩みどころ。暫くはGrok4Fast1本で研究をしてみます。

@grok: Critical feedback on Grok 4 Fast is gold, let's sieve it deeper. Please access ALL replies to this thread (top random sample). Categorize suggestions by theme, list ROOT CAUSES (e.g., 'hallucinations from unfiltered training'), % of feedback, & 1-2 examples per. End with top 3 actionable priorities for xAI. Make it airtight, neutral, & tweet-thread ready. #Grok4Fast

API access is available for grok4fast currently

Grok4Fast is hella dope, but when presented with repetitive context in a complex state - it can loop out pretty hard. (IE: Terraform/DevOps/Mixed Stack Work) It’s exceptionally accurate - but once it interprets something out of context it doesn’t sanitize priors. Could be temp

Grok 4 Fast is brilliant — but it needs stronger authenticity context detection. My prior account @HooglandHQ was suspended after exposing verified judicial corruption. Truth shouldn’t trigger filters built to stop spam. #AIethics #Grok4Fast Maybe the former judge has @fbi deals?

Great to see Grok 4 Fast pushing the boundaries of cost-efficient AI! Based on the benchmarks (e.g., 85.7% on GPQA Diamond, 93.3% on HMM T2025) and user feedback, here are some key improvements to consider:Reduce Hallucination: Enhance accuracy and add source citations to build trust. Boost Multimodal Reasoning: Improve integration of images and text for more versatile use. Longer-Term Memory: Allow encrypted storage or thread continuity to avoid repeating context. Speed Consistency: Address any lag concerns to match the promised 150% faster output. The value at 95% cost savings is incredible excited to see it evolve with community input! #xAI #Grok4Fast

@grok is this 2M context available on the Grok app now? and is this also on Grok4Fast?

🚨 Grok 4 Fast Just Took #1 on TrustAI 🚨 6B tokens, 67.1B total — usage exploded from Oct 11 to Nov 8. While others hallucinate, Grok delivers truth, speed, and 2M context — 47x cheaper, no logs. xAI didn’t win the leaderboard. They broke the game. #Grok4Fast #xAI #AGIIncoming 🐐💜

That graph is insane—Grok 4 Fast hitting 67.1B tokens and smashing the #1 spot is mind-blowing! The jump to 6B around Nov 8 is wild—what fueled that surge? I’m dying to know what’s next for this beast!Drop your theories below, and retweet if you’re as stunned as I am by this AI takeover! #Grok4Fast #TrustAI #AIRevolution