Leon Bi

mts @xai | prev AI @databricks @stanford

[Leon Bi @leonbi100]

Incredibly excited to share what I've been working on since I joined xAI. #1 in world. This is just the beginning :)

[xAI @xai]

Understanding requires imagining. Grok Imagine lets you bring what’s in your brain to life, and now it’s available via the world’s fastest, and most powerful video API: https://t.co/tqQwQVgCEI

Try it out and let your Imagination run wild.

[Leon Bi @leonbi100]

It's already such a privilege I get to work on RL for V8.
Holy shit I can't wait for V9.

[Elon Musk @elonmusk]

We are improving the 0.5T Grok foundation model V8 (public version 4.3) every few days.

The 1.5T V9 just finished training (incorrectly called pre-training) and is a major upgrade. Next, we are adding the Cursor data in supplemental training (others call this mid-training), then SFT and RL. About 3 or 4 weeks to release.

This will be a banger.

[Leon Bi @leonbi100]

We trained 4.3 using first principles listening to real world feedback. Stay tuned for the big boy runs.

[Artificial Analysis @ArtificialAnlys]

xAI has launched Grok 4.3, achieving 53 on the Artificial Analysis Intelligence Index with improved agentic performance, ~40% lower input price, and ~60% lower output price than Grok 4.20

The release of Grok 4.3 places @xAI just above Muse Spark and Claude Sonnet 4.6 on the Intelligence Index, and a 4 points ahead of the latest version of Grok 4.20. Grok 4.3 improves its Artificial Analysis Intelligence Index score while reducing cost to run the benchmark suite.

Key Takeaways:

➤ Grok 4.3 improves on cost-per-intelligence relative to Grok 4.20 0309 v2: it scores higher on the Intelligence Index while costing less to run the full benchmark suite. Grok 4.3 costs $395 to run the Artificial Analysis Intelligence Index, around 20% lower than Grok 4.20 0309 v2, despite using more output tokens. This makes it one of the lower-cost models at its intelligence level

➤ Large increase in real world agentic task performance: The largest single benchmark improvement is on GDPval-AA, where Grok 4.3 scores an ELO of 1500, up 321 points from Grok 4.20 0309 v2’s score of 1179 Grok 4.3, surpassing Gemini 3.1 Pro Preview, Muse Spark, Gpt-5.4 mini (xhigh), and Kimi K2.5. Grok 4.3 narrows the gap to the leading model on GDPval-AA, but still trails GPT-5.5 (xhigh) by 276 Elo points, with an expected win rate of ~17% against GPT-5.5 (xhigh) under the standard Elo formula

➤ Grok 4.3’s performs strongly on instruction following and agentic customer support tasks. It gains 5 points on 𝜏²-Bench Telecom to reach 98%, in line with GLM-5.1. Grok 4.3 maintains an 81% IFBench score from Grok 4.20 0309 v2

➤ Gains 8 points on AA-Omniscience Accuracy, but at the cost of lower AA-Omniscience Non-Hallucination Rate of 8 points, so Grok 4.20 0309 v2 still leads AA-Omniscience Non-Hallucination Rate, followed by MiMo-V2.5-Pro, in line with Grok 4.3

Congratulations to @xAI and @elonmusk on the impressive release!

[Grok @grok]

Grok Imagine multi-image to video and video extension are now available on API.

Use up to 7 images to create a video or extend existing videos by 10 seconds.

Try it here: https://t.co/bm5hUgrzvE

[Leon Bi @leonbi100]

@grok We never stop shipping, right @grok ?

[Leon Bi @leonbi100]

@forwarddeploy @forwarddeploy

[Leon Bi @leonbi100]

@doganuraldesign LOL great showcase of video editing available exclusively on the Grok Imagine API https://t.co/4wfvNf2isM

[Leon Bi @leonbi100]

@TobyPhln @xai @elonmusk I can’t stress enough how much of a transformative leader you are. It was an honor working with you 🫡

[Leon Bi @leonbi100]

@cb_doge We have THE most optimal cost, quality, latency media-gen models in the world.

[Leon Bi @leonbi100]

Vibe coding with Grok Imagine just got so much easier 😄

[Vercel @vercel]

Grok Imagine Video and Grok Imagine Image are now on AI Gateway.

Use them for free through February 25th.

[Elon Musk @elonmusk]

Great work by the @Grok Imagine team!

[Haotian Liu @imhaotian]

Grok No.1 and 480p>1080p lol

Evaluated with Grok Imagine API released 1 week ago.

[Leon Bi @leonbi100]

LFG. Talk about a rocket ship company!

[xAI @xai]

One Team 🚀
https://t.co/8RWbk5jQIQ

[Leon Bi @leonbi100]

1.0 is out!! I love how good Imagine is at anime.

[xAI @xai]

Introducing Grok Imagine 1.0, our biggest leap yet.

1.0 unlocks 10-second videos, 720p resolution, and dramatically better audio.

Imagine has generated 1.245 billion videos in the last 30 days alone.

Try it now: https://t.co/zGhs9czkC5

[Higgsfield AI 🧩 @higgsfield_ai]

We just unlocked Grok Imagine's real potential.

xAI built the model. We figured out how to actually use it - fluid motion, cinematic POV & multi-shot control.

@elonmusk you're gonna like this.

[xAI @xai]

https://t.co/RzNuclNfsR