xAI Releases Grok 4.5: Cursor-Trained Coding and Agentic Model at $2/M Input Tokens

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SpaceX/xAI has released Grok 4.5, a model explicitly trained with Cursor for coding and agentic task performance, priced aggressively at $2 per million input tokens. The Cursor-training angle is notable — it suggests the model has been optimized for the edit-apply-test loop that characterizes real coding agent workflows rather than just code completion benchmarks. This positions Grok 4.5 as a direct competitor to Claude 3.5 Sonnet and GPT-4o for developer tooling and code agent use cases. The $2/M input price undercuts many comparable models, making it attractive for high-volume coding pipelines. Developers running code generation at scale or building IDE-integrated agents should benchmark this against their current model choice.