SpaceXAI releases Grok 4.5: Elon Musk calls the model Claude Opus level

Elon Musk's company SpaceXAI released a new version of its AI model Grok 4.5 on July 8, 2026. The developer positions it as a cheaper and more efficient alternative to other powerful models, and Musk compared the system's level to Claude Opus.

What SpaceXAI presented

SpaceXAI presented Grok 4.5 as the next major update to the Grok line. From the published information, it follows that the company focused not only on model power, but also on the cost of its use and efficiency.

• Grok 4.5 release took place on July 8, 2026
• Developer — Elon Musk's SpaceXAI company
• Musk described the model as an Opus-level system
• The company promises lower costs compared to other powerful AI models
• The statement also emphasizes improved efficiency of Grok 4.5

The phrasing "Opus-class model" refers to the most productive models from Anthropic, including the Claude Opus family. However, in the available description, there are no results of independent tests, comparison tables, or specific metrics that would allow verification of this comparison.

What is known about efficiency

SpaceXAI promises that Grok 4.5 will be more efficient than other powerful models. In the context of AI systems, this could mean lower computational costs, cheaper queries, or the ability to perform similar tasks with fewer resources, but the company did not clarify the exact meaning.

Also, the technical characteristics of the release have not been disclosed. The original message contains no information about model size, context window, generation speed, supported modes, results on popular tests, or list of available functions. Therefore, Grok 4.5 can only be evaluated based on its declared positioning, not on verified metrics.

Elon Musk described Grok 4.5 as an Opus-level model.

The promise to reduce costs is particularly important for developers and companies that regularly use large language models. If Grok 4.5 truly offers comparable quality at a lower price, it could intensify competition between SpaceXAI, Anthropic, and other AI providers. But without specific pricing and access conditions, the economic impact is still impossible to calculate.

What questions remain

The main uncertainty is related to practical availability of Grok 4.5. The release message does not specify where exactly the model can be used, what tariffs apply to users and developers, whether API access is available, and how the new version differs in features from previous Grok releases.

Also unclear is what tasks the company considers key for this version. SpaceXAI did not provide examples of the model working with code, document analysis, search, multimodal data, or agentic scenarios. Therefore, the comparison with Claude Opus-class models remains a statement from the company's leadership, not a confirmed test result.

For a full assessment, official technical documentation, pricing, API access, and independent quality verification will be needed. For now, the news records the very fact of release and two main promises from SpaceXAI: lower cost and greater efficiency.

What this means

Grok 4.5 intensifies competition in the market for powerful AI models, but the information presented is too limited to conclude real superiority or comparability with Claude Opus. At this point, this is a release with ambitious positioning, not a confirmed technological breakthrough.