XAI just released Grok 4.1 Fast. It is fast model that is leading AI agent ranking. It has real-time X data, web browsing, and code tools.
Elon Musk says Grok 4.20 should release by Xmas. It will upgrade top benchmarks where Grok 4.1 Fast scored perfectly in agentic tool use and beat rivals like GPT-5 in speed and cost. Users are already raving about Grok 4.1 Fast with one building a full ASCII Mario game in minutes, as xAI pushes rapid improvements in reliable, long-context AI.
XAI Grok 5 launches Q1 2026 with 6T parameters (2x Grok 4). Real-time video understanding, superior reasoning & tools. xAI is scaling fast via GPU clusters + live X data.
Claim that Grok-4.1 is god-tier for C programming. Tetsuo built an ASCII Mario CLI game with pad-based double-buffering, multi-layer rendering, and procedural generation in about 15 minutes.
Lots of compute to run emacs and an ASCII game >:D
Grok-4.1 is god-tier for C programming.
I built an ASCII Mario CLI game with pad-based double-buffering, multi-layer rendering, and procedural generation in about 15 minutes!
Lots of compute to run emacs and an ASCII game >:D
Building a molecular dynamics sim next. pic.twitter.com/QTzrnSa9Tx
— TΞTSUØ (@tetsuoai) November 20, 2025
The Grok 4.20 upgrade, which is a major improvement, might be ready by Christmas https://t.co/wpNYRvJMSm
— Elon Musk (@elonmusk) November 20, 2025
Elon Musk is building the world’s largest AI supercomputer, powered by over one million GPUs pic.twitter.com/2Em5dSZofo
— SMX 🇺🇸 (@iam_smx) November 19, 2025
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I will be testing this claim later tonight. Frankly Grok 4 fast and Grok 4 code were a big disappointment with tool use in my fav IDE (Zed). I primarily use Deepseek reasoner API (directly from deepseek.com) as, despite what the graph indicates, it’s very good for tool-use for coding – perhaps that chart is for a deepseek clone. I also use Anthropic’s Claude 4, which is a little better than deepseek, but is much more costly to use.
Grok 4.1 fast could be revolutionary if it can really use tools for coding as well as this claim indicates, because it’s cheap and has a huge context window – but I am skeptical. Will update here later.
Okay, I only tested Grok 4.1 once – one prompt … yes I know not a good measurement, so you may want to try it yourself and not take my word on it. But the first prompt it went off the deep end and started dumping repetitive text to the session output. I was using the paid version through open-router, not the free one. I do not know what caused the issue, but I don’t have time as a coder or the desire to risk my work with something like this.
My review: grok 4.1 fast (not the regular model, grok 4.1 – which I can’t afford to use for coding); is not ready for prime-time coding use.
Back to deepseek I go.
Sorry, just to be clear, I did not use “Grok 4.1”; I used “Grok 4.1 fast” in my quick test. Grok 4.1 is likely much better, but it is also vastly more expensive to use for coding relative to deepseek and even Claude 4.