xAI has announced the release of Grok-1.5, an upgraded large language model with improved reasoning capabilities and a context length of 128,000 tokens. Grok-1.5 achieved a 50.6% score on the MATH benchmark and a 90% score on the GSM8K benchmark, showcasing its performance in math and coding tasks. The model is built on a custom distributed training framework based on JAX, Rust, and Kubernetes, and will soon be available to early testers and existing users on social media platform X.