Grok 4.5 Arrives Promising Anthropic-Tier Power at Half the Token Cost

xAI, Elon Musk's artificial intelligence company, has officially released Grok 4.5 to the public — marking the firm's first major model drop since going public earlier this year. The release arrives during what is shaping up to be one of the busiest weeks in recent AI industry history, with OpenAI also preparing to launch GPT-5.6 as early as Thursday. xAI framed the new release in a blog post as a dependable, all-purpose workhorse capable of handling coding, app development, research, writing, and general office automation tasks that have become the standard benchmarks for modern language models.

Perhaps the most striking claim from xAI is around token efficiency. The company says Grok 4.5 delivers twice the token efficiency of comparable leading models — a figure that, if it holds up in real-world deployments, would represent a meaningful financial advantage for enterprise customers. Token costs have emerged as a genuine pain point as businesses scale AI usage, making efficiency gains not just a marketing talking point but a practical competitive differentiator.

Elon Musk personally weighed in via his social platform X, comparing Grok 4.5 favorably to Anthropic's Opus line of models — which are specifically designed for intensive, complex task completion. 'It is an Opus-class model, but faster, more token-efficient and lower cost,' Musk wrote in his announcement post. He later added that xAI's internal benchmarks place Grok 4.5 roughly on par with Opus 4.7 in terms of raw capability, while claiming speed and cost advantages across the board.

The pricing structure xAI announced is notably aggressive. Grok 4.5 will cost $2 per million input tokens and $6 per million output tokens. By contrast, Anthropic's Opus 4.7 is priced at $5 per million input tokens and $25 per million output tokens — making xAI's offering dramatically cheaper if the capability claims hold. OpenAI's tiered offerings span from its premium Sol model at $5 input and $30 output per million tokens, down to Luna at $1 and $6 respectively, giving the market a wide range of price points to compare against.

Benchmark data released alongside the announcement showed Grok 4.5 performing competitively against top-tier rival models, though xAI stopped short of claiming outright best-in-class status across all metrics. The model had been in a beta program with select customers prior to public release, and Musk cited 'strong positive feedback' from that cohort as a key factor in accelerating the public rollout. The timing of the launch — just ahead of OpenAI's own major release — ensures that xAI will remain squarely in the spotlight of an already crowded AI news cycle.