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Musk's Grok 4.5 Takes on AI Giants: Claims Opus-Level Smarts at a Tenth of the Price

The AI wars just got a new contender. On Wednesday, Elon Musk's SpaceX AI officially launched Grok 4.5, its latest large language model and the first major update since the company went public weeks ago. Musk took to X (formerly Twitter) to hype it up, positioning Grok 4.5 as a direct rival to Anthropic's high-end Opus model. "An Opus-level model, but faster, more token-efficient, and lower in cost," he declared.

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According to a SpaceX AI blog post, Grok 4.5 is designed as a versatile workhorse for general tasks—coding, app development, office work, research, and writing. Benchmark tests show it's in the top tier, just a hair below the current ceiling models, but still highly competitive. The real kicker? It's priced to undercut the competition.

Token Efficiency Doubled, Prices Slashed

One of Grok 4.5's standout features is "double the token efficiency," meaning it generates fewer tokens for the same workload, slashing inference costs. In an era where API pricing is a make-or-break factor for developers and enterprises, this could be a game-changer.

SpaceX AI's pricing is aggressive: $2 per million input tokens and $6 per million output tokens. Compare that to Anthropic's Opus 4.7 at $5 input and $25 output, or OpenAI's top-tier Sol at $5 input and $30 output. Even OpenAI's entry-level Luna, at $1 input and $6 output, matches Grok only on the output side—but Grok's capabilities are far superior.

A Week of AI Launches Heats Up Competition

Musk revealed that based on strong positive feedback from trial customers, Grok 4.5 will be fully opened to the public tomorrow. He added that internal assessments show its overall capabilities are "roughly comparable to Anthropic's Opus 4.7, but with faster speed." The combination of capability, speed, and cost, he argued, is what sets Grok 4.5 apart.

This launch comes amid a flurry of AI product releases this week, intensifying the already fierce competition. With Grok 4.5, SpaceX AI is making a bold play: offering near-top-tier performance at a fraction of the price. Whether it can deliver on its promises remains to be seen, but the message is clear—the AI price war is on.

Key Points

  • Grok 4.5 launched by SpaceX AI, claims performance comparable to Anthropic's Opus 4.7.
  • Pricing: $2/M input tokens, $6/M output tokens—significantly cheaper than rivals.
  • Token efficiency doubled, reducing inference costs.
  • Public access opens tomorrow after positive trial feedback.
  • Direct challenge to OpenAI and Anthropic in the AI model market.