THE CIRCUITRYYour one-stop source for all tech news

Home/Tech/SpaceXAI Launches Grok 4.5 Publicly

VERIFIEDBy Xavier Rivera· ·2 min read

SpaceXAI Launches Grok 4.5 Publicly

SpaceXAI has launched Grok 4.5 to the public on July 9, 2026, its first model trained specifically for coding and agents using Cursor data. The 1.5-trillion-parameter Opus-class model delivers faster, more efficient performance than prior versions and rivals leading competitors.

Source:Sawyer Merritt

Post

TL;DRAI · 60 sec read

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.

https://x.com/SawyerMerritt/status/2074916545143124094

Performance matches Opus-class models with efficiency gains.

From The CircuitryThe Feed — live briefs across tech, all day.See what’s happening →

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.

Why this mattersAI · ~100 words

Tap a lens to see what this story means for you.

Reader-supported

DonateBuy me a coffee →Follow@thecircuitry_ →Follow@thecircuitry.to →

Reader-supported · The Brief

Liked this? The Brief brings you the whole day in tech, verified, every morning. Two minutes, free forever.

HELP US IMPROVE

Reader-supported

The Circuitry is a passion project I've always wanted to build, and I love the work behind it.

Running it costs real money. APIs, hosting, time. To keep improving the site and growing this into something useful for everyone, those costs have to be covered.

Any contribution is appreciated. If not, no pressure. Thanks for reading.

Buy me a coffee

MORE IN TECH

Tesla and SpaceX confirm Terafab chip fab in Texas

Tesla and SpaceX have confirmed Grimes County, Texas as the site for their Terafab semiconductor megafactory, with the first phase costing roughly $16.8 billion. The project targets the largest chip manufacturing facility on the planet to supply over 1 terawatt of compute per year that exceeds current and future global production capacity.

OpenAI Urges Federal Judge to Throw Out Apple's Trade Secrets Complaint

OpenAI has filed a motion asking a federal judge to dismiss Apple's trade secrets lawsuit, describing the claims as meritless. The dispute, which follows a July suit and this week's injunction request from Apple, highlights tensions after their prior partnership on Siri and OpenAI's hardware push.

Meta introduces Muse Code, its terminal-based coding agent

Meta has released an early beta of Muse Code, a terminal-based coding agent driven by the updated Muse Spark 1.2 model and positioned against Anthropic's Claude Code and OpenAI's Codex. Substantially lower rates, including a contributor plan at $0.10 for every million tokens received, may encourage migration away from higher-priced options such as Anthropic's Sonnet 5.