SpaceXAI Launches Grok 4.5 Publicly

SpaceXAI has made Grok 4.5 available to the public. The model, described as the company's first trained specifically for coding and agents, offers frontier intelligence at leading speeds and was trained with Cursor.

SpaceXAI rolls out Grok 4.5 after beta testing.
The public launch occurs on July 9, 2026, one day after the July 8 announcement. Elon Musk confirmed the release based on strong positive feedback from the beta test program that ran for two weeks at SpaceX and Tesla. The rollout follows the integration of xAI into SpaceX earlier in 2026, which led to the rebranding as SpaceXAI.

Grok 4.5 targets coding and agent capabilities.
The model stands as SpaceXAI's first trained specifically for coding and agents. It underwent training with Cursor, the AI-powered code editor, to enhance performance in developer workflows and complex task handling. This supplemental training on Cursor data builds on the V9 foundation model, which contains 1.5 trillion parameters.

Musk characterizes Grok 4.5 as an Opus-class model that delivers faster operation, greater token efficiency, and lower cost compared to competitors. It builds on prior Grok versions, including Grok 4.3 from April 2026. The company positions it as frontier AI for reasoning, code, voice, images, and video, with access through a unified API that supports multiple modalities.

Availability expands through API and public channels.
Developers gain access via the SpaceXAI platform, which reports more than 1 million API calls per day and median latency under 200 milliseconds. The site highlights training on the world's largest supercluster and provides code examples in Python, TypeScript, and cURL for integration. Grok 4.5 joins a lineup of five or more model families available through one endpoint.

Launch fits into accelerated AI release cadence.

The debut aligns with reports that Musk vows monthly model launches starting with Grok 4.5. It enters a competitive field alongside releases from OpenAI, Anthropic, and others in 2026. SpaceXAI's official site updated on July 8, 2026, to introduce the model alongside recent additions like new flagship voices on July 6.