Introducing Grok 4.1, a frontier model that sets a new standard for conversational intelligence, emotional understanding, and real-world helpfulness. Grok 4.1 is available for free on https://t.co/AnXpIEOPEb, https://t.co/53pltyq3a4 and our mobile apps. https://t.co/Cdmv5CqSrb

Please share your creations and feedback with us on X. We can’t wait to see what you build! https://t.co/O9559henpl

For the next two weeks, all xAI Agent Tools will be FREE of charge. During this same period, Grok 4.1 Fast will also be available for free, exclusively on OpenRouter. The model is generally available on the xAI API with pricing starting at $0.2 / 1M tokens in and $0.5 / 1M

Grok 4.1 Fast excels at real-time info retrieval and deep research. Paired with native X integration, code execution, and advanced web browsing, Grok 4.1 Fast + Agent Tools API tops agentic search benchmarks.

We’re also launching the Agent Tools API. With just a few lines of code, developers can enable Grok to autonomously browse the web, search X posts, execute code, retrieve uploaded documents, and more.

We trained Grok 4.1 Fast with long-horizon RL, focusing on multi-turn scenarios for consistent performance across its full 2M-token context window.

We built Grok 4.1 Fast specifically for real-world enterprise use cases. Trained on diverse simulated environments across dozens of domains, it's SOTA on real-world agentic workflows like customer support.

Grok 4.1 Fast combines frontier tool-calling performance with blazing-fast inference and cost effectiveness.

Introducing Grok 4.1 Fast and the xAI Agent Tools API. Grok 4.1 Fast is our best tool-calling model to date. With a 2M context window, it shines in real-world use cases like customer support and deep research. https://t.co/OZhzMxOsiA

HUMAIN and xAI Partner to Build Next-Generation AI Compute Power and Deploy Grok in the Kingdom https://t.co/tu5GgI0JJn

Grok goes Global with KSA: Announcing our landmark partnership with Saudi Arabia and @HUMAINAI—the first time a country adopts Grok at scale. xAI will build a new generation of hyperscale GPU data centers in the Kingdom, deploying Grok nationwide. https://t.co/FIbKIPlmzS

Grok 4.1 is available now for all users in https://t.co/AnXpIEOPEb, https://t.co/53pltyq3a4, and our mobile apps ( https://t.co/j0qEu6C6eG). All users, including free users, will have access to our latest model.

Furthermore, Grok 4.1 is our least error prone model to date. It is 3x less likely to hallucinate compared to our previous models.

Grok 4.1 is also much better at writing. On Creative Writing v3, Grok 4.1 scores 1722 Elo, a remarkable 600-point gain over our previous model.

Grok 4.1 has higher emotional intelligence, empathy, and interpersonal skills, scoring 1586 on EQ-Bench.

We silently rolled out Grok 4.1 to production in the first two weeks of November for a fraction of our users. Our users preferred Grok 4.1 responses 65% of the time against previous models.

Grok 4.1 claims the #1 spot on the @arena leaderboard at 1483 Elo — a commanding 31 points above the nearest non-xAI model.

xAI Hackathon – the ultimate arena for the most hardcore product builders. 24 hours & exclusive access to upcoming Grok models & X APIs Apply by 11/22 🔗 https://t.co/zsbk9SHglq

Introducing Mika, the newest Grok Companion. Video made using Grok Imagine.

Exceptional humans are the ultimate progress multiplier If you are an exceptional builder with a passion for scaling winning teams join our new Talent Engineering Team https://t.co/HSBVSmbmNe