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SpaceXAI (xAI) released Grok 4.6, an updated flagship large language model with supplemental post-training for long-context and long-running agent performance

Model release ● Confirmed 86% confidence first seen

SpaceXAI released Grok 4.6 as an update to its prior Grok 4.5 flagship model, adding supplemental post-training focused on longer coding and long-horizon agent tasks. Coverage also reports improved benchmark performance on coding/agent evaluations, support for very long context windows, and mentions updated token pricing alongside broader availability via the xAI API and related products.

Grok 4.6 SpaceXAI xAI Anthropic PBC Artificial Analysis Intelligence Index Claude Fable 5 Cursor CursorBench v3.2 Elon Musk GPT-5.6 Sol Max Grok 4.5 Grok Build SpaceX Corp The New Stack xAI API

Source coverage

SpaceXAI trained Grok 4.6 on something most AI labs throw away The New Stack SpaceXAI releases flagship Grok 4.6 model with advanced reasoning capabilities SiliconANGLE independent SpaceXAI Releases Grok 4.6: A 500K-Context Frontier Model Tuned for Long-Running Agents, Coding, and Knowledge Work MarkTechPost

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