Elon Musk said Claude Opus 5.5 was a “masterpiece” and expected Grok 5 could surpass it in 2 to 3 months
On November 10, 2026, Elon Musk responded to a user question on X, saying that the upcoming Grok 4.8 was not as good as Anthropic’s Claude Opus 5.5, and that Opus 5.5 was a masterpiece.
He also said that Grok 5 should exceed Opus 5.5, and believed that this might happen in 2 or 3 months, after which it would continue to accelerate. The statement appeared in a direct reply to a user asking about a comparison between Grok 4.8 and Opus 5.5.
The post was Musk’s personal public statement and was not accompanied by specific benchmark data, an official launch timeline, or a company announcement. Media reports pointed out that Musk’s timeline predictions have historically often been adjusted. Anthropic has previously released Opus 5.5, and related performance and pricing information should be based on the company’s official disclosure.
Original source:
Title: Not as good. Opus 5.5 is a masterpiece. But Grok 5 should exceed Opus 5.5 and maybe that happens in 2 or 3 months... Publisher: Elon Musk (@elonmusk) Publication date: 2026-11-10 URL: https://x.com/elonmusk/status/2120099798078656909 Nature of source: personal public social media reply Verification status: full text obtained this time; consistent with citations in multiple media reports Supporting content: supports Musk’s assessment of Opus 5.5 and his personal prediction of Grok 5’s timeline
ABAB AI Insight
Musk’s reply directly compared the relative positions of xAI’s current and next-stage models with Anthropic’s flagship model. He acknowledged that Grok 4.8 is currently behind, while placing the timing of surpassing it 2 to 3 months out, which is a prediction with a “maybe” qualifier rather than a confirmed product roadmap.
Such a public statement is relatively rare in AI competition because it acknowledges that a competitor’s model is currently better. Whether the actual surpassing happens still depends on independent benchmark tests after the next model release, real-world usage performance, and Anthropic’s own iteration pace. Anthropic has already released an updated model in the market, and the target itself may also move.
For observers, this post provides a qualitative judgment and time expectation from the founder’s perspective. Its added value lies in the immediate signal about the competitive landscape, rather than verifiable performance data. Going forward, attention should focus on the actual launch of Grok 4.8 and user feedback, as well as formal release information for Grok 5.
ABAB News · Laws of cognition
A public founder comparison is a personal judgment, not an independent benchmark result.
Timeline predictions often come with qualifiers and have historically been adjusted.
The “surpass” in AI model competition must be judged by actual post-release performance and third-party evaluations.