Elon Musk’s xAI, released grok-code-fast-1, a dedicated agentic coding artificial intelligence model that is extremely speedy and designed to strike a “compelling balance between performance and cost.” In a market that is quickly becoming cluttered with models offering coding capabilities, xAI said it built the model from the ground up and built it with a brand-new architecture fit for task. Grok-code-fast-1 has mastered the use of common tools like grep, terminal, and file editing, and thus should feel right at home in your favorite IDE. The model supports function calling, structured outputs and reasoning with a 256,000 token context window. This window size enables the model to recall the equivalent of hundreds of pages of text or code simultaneously, allowing it to efficiently review large portions of codebases while working. As for speed, according to xAI’s own benchmarks, the new model can execute at around 160 tokens per second. Compared to other popular models on the market in the same xAI released benchmarks, OpenAI’s GPT-5 averages around 50.1 tp/s, Gemini 2.5 Pro hit around 92.4 tp/s and Claude 4 Sonnet reached 78.7 tp/s. The company said on a full subset of SWE-Bench-Verified, a human-validated evaluation of the AI model’s ability to solve real-world software engineering problems, the model received a 70.8% using an internal system. In comparison, GPT-5 received a 74.9% (with thinking) and Claude Sonnet 4 achieved 72.7%. Given that xAI will be competing against multiple other models on the market that provide coding capabilities, the company said it intends to deliver consistent updates and improvements on the order of days rather than weeks.