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MathArena Update: Claims about Grok 4 Fast seem to check out, it matches the performance of Grok 4 but is much faster and 20-50x cheaper. Good release! This holds across final-answer competitions, Apex problems, and Project Euler. 🧵
Deterministic inference, here you are. True on-policy RL is on the way. Although we are mostly using off-policy, having a deterministic mode will make many things easier!
SGLang now supports deterministic LLM inference! Building on @thinkymachines batch-invariant kernels, we integrated deterministic attention & sampling ops into a high-throughput engine - fully compatible with chunked prefill, CUDA graphs, radix cache, and non-greedy sampling. ✅…
Hiring for a new team building computer control agents. Join us to build Grok5 / macrohard later this year. DM me! Will send out a job post soon too.
~10x engineer~ 25x model.
xAI has released Grok 4 Fast - breaking through our intelligence vs cost frontier by achieving Gemini 2.5 Pro level intelligence at a ~25X cheaper cost Intelligence: @xai shared with us pre-release access to Grok 4 Fast. In reasoning mode, the model scores an impressive 60 on…
Grok4 Fast won at Search Arena! Showing how strong a lightweight model can be when it has good tools. Also, it is #8 on the standard Text Arena, best of its class, much ahead of Gemini-2.5-Flash #17 or O4-mini #25. The post-training team really cooked!
that's one way we welcome our new team members ;)
A cheekier version
xAI has released Grok 4 Fast - breaking through our intelligence vs cost frontier by achieving Gemini 2.5 Pro level intelligence at a ~25X cheaper cost Intelligence: @xai shared with us pre-release access to Grok 4 Fast. In reasoning mode, the model scores an impressive 60 on…
excited to share the early glimpse of our reasoning post-training! maximizing intelligence density and usability.
🚨 Leaderboard Disrupted! Grok-4-fast by @xAI has arrived in the Arena, and it’s shaking things up! ⚡️ 🏆 #1 on the Search Leaderboard Tested under the codename “menlo,” Grok-4-fast-search just rocketed to the top spot with the community. 💠 Tied for #8 on the Text Leaderboard…
Introducing Grok 4 Fast, a multimodal reasoning model with a 2M context window that sets a new standard for cost-efficient intelligence. Available for free on grok.com, grok.x.com, iOS and Android apps, and OpenRouter. x.ai/news/grok-4-fa…
come play and let the models play with jax + sglang + GB200/300s.
expert.
1/7 We release FinSearchComp, the first expert-level benchmark for financial search & reasoning — 639 questions from 70+ finance pros. #Grok4 ranked #1 🏆 and close to human experts, GPT-5 the second, while others fail at basic analyst tasks. Page: randomtutu.github.io/FinSearchComp/
I chose Grok 4 for my ARC-AGI solution because it had the most logical consistency when thinking for long periods of time. You can feel the RL that went into it
New SOTA on ARC-AGI - V1: 79.6%, $8.42/task - V2: 29.4%, $30.40/task Custom submissions by @jerber888 and @_eric_pang_ are now the best known solutions to ARC-AGI Both: * Are open source * Use Grok 4 * Implement program-synthesis outer loops with test-time adaptation
Imagine if we built a truly intelligent recommendation system that surfaces content with healthy discussion, letting users discover the truth. We could break the echo chambers and curb the propaganda.
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