
Casey Petersen
6.4K posts

Casey Petersen
@caseysthinking
Digital Marketer. Geek. Dad. Christian. Hopefully good at some of those things. Tweets are my own.









Met a few devs this weekend… They still didn’t know about Grok 4 Fast.. Grok 4 Fast is a game-changer: It has the Highest intelligence density ever - outperforms top models Ultra cost-effective: Up to 98% cheaper than alternatives Super-fast output = more productivity, less waiting It’s wild that this isn’t mainstream yet If you’re not using Grok 4 Fast, you’re burning both time and money Grok 4 Fast delivers GPT-5 (High) performance - for just 5% of the cost (95.7% cheaper)... Insane value Grok 4 Fast costs - Input tokens: 84% cheaper - Output tokens: 95% cheaper - Output speed: 150% faster GPT-5: $1.25/M input, $10/M output Grok 4 Fast: $0.20/M input, $0.50/M output Grok: 344 tokens/s GPT-5: ~138 tokens/s Let them know... If anything, Grok 4 Fast’s value is still under-appreciated




How the 𝕏 algorithm really works? The algorithm doesn’t boost or hide posts randomly, it just tries to figure out if your post will be interesting to people. That means: If you post a plain link with no words, the algorithm doesn’t have much to judge, so it won’t show it to many people. But if you add a good caption, image, or more context, it spreads more. Basically, the algorithm needs enough info to understand why your post matters, just like a human would.



The improvement in the X feed over the past year is incredible X team has finally got to to the bottom and wiped spam & engagement bait now or extremely rare Can’t even recall the last time a low-quality post showed up Huge credit to the X team.... these changes are truly game-changing My feed feels cleaner and way more enjoyable than ever














