Elon Musk sets July 9 launch for Grok 4.5 AI model

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Musk prepares Grok 4.5 release

Highlights

Musk says Grok 4.5 will go public Thursday.
He pitches it as faster and cheaper than Claude Opus.
The model is based on a 1.5T-parameter V9 foundation model.
Public benchmarks and pricing have not yet been released.

Musk described Grok 4.5 as an “Opus-class” model that is faster, more token-efficient, and cheaper, according to Cryptopolitan. The model is based on a 1.5 trillion-parameter V9 foundation model and includes supplemental training data from Cursor, the coding startup SpaceX is reportedly in the process of acquiring for $60 billion.

Grok 4.5 moves from beta to public release

The model had been in private beta at SpaceX and Tesla, where Musk said internal evaluations showed performance close to, or possibly above, Opus. The release was originally expected earlier in the week but was pushed back as engineers worked on efficiency, according to the report.

The launch also comes after xAI rebranded itself as SpaceXAI. Grok 4.5 is described as the first model built jointly with Cursor, a notable move because coding performance has become one of the most important battlegrounds in frontier AI.

Musk has said the company plans to release new models trained from scratch every month this year, an unusually aggressive schedule for a major AI lab.

Opus comparison remains unproven

The central question is whether Grok 4.5 can match Anthropic’s Opus models outside internal testing. The report notes that Musk’s comparison has not been backed by public benchmarks, and it is not yet clear which Opus version he is using as the reference point.

That distinction matters because the leading AI models are now tightly clustered. Cryptopolitan cited Stanford’s 2026 AI Index as saying Anthropic, xAI, Google, and OpenAI were within 25 Elo points on the Arena leaderboard as of March 2026. As raw capability narrows, competition is shifting toward speed, cost, reliability, and developer usefulness.

Cost and speed become the new AI fight

Grok 4.5 matters because the frontier AI race is no longer only about topping benchmark tables. Businesses are also weighing how quickly models respond, how much they cost to run, and how efficiently they handle large workloads.

If Grok 4.5 delivers Opus-level performance at a lower price, it could strengthen Musk’s position against Anthropic, OpenAI, and Google. If the claim does not hold up in independent testing, the launch may be remembered more as a marketing push than a technical reset. The first public evaluations after release will decide which version is closer to reality.

Earlier, we reported how Musk built his fortune on electric cars, space, and AI.

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