SpaceXAI releases Grok 4.5, Musk calls it ‘Opus-class model’
9 reported
SpaceXAI has released its latest model, Grok 4.5, the first since the company went public several weeks ago. In a blog post published Wednesday, SpaceXAI described the new release as a workhorse capable of handling typical AI-automated tasks such as coding, office work, research, and writing. The company stated that the model has “twice greater token efficiency” than other leading models, which could reduce costs for AI consumers. Benchmark metrics released Wednesday showed Grok’s competitiveness with other top models, though just short of best-in-class. Founder Elon Musk posted on his social media platform X that Grok 4.5 is an “Opus-class model” that is faster, more token-efficient, and lower cost than Anthropic’s Opus. Musk later added that internal assessment finds Grok 4.5 “roughly comparable to Opus 4.7, but much faster.” SpaceXAI says the new model costs $2 per million input tokens and $6 per million output tokens, compared to Opus 4.7 at $5 and $25 respectively. The release comes ahead of OpenAI’s planned release of GPT 5.6 on Thursday, which OpenAI has called its “strongest model yet.”
What’s reported
SpaceXAI released Grok 4.5, its first model since going public several weeks ago.
The company described it as a workhorse for coding, office work, research, and writing.
SpaceXAI claims “twice greater token efficiency” than other leading models.
Benchmark metrics showed Grok competitive with top models but just short of best-in-class.
Elon Musk posted on X that Grok 4.5 is an “Opus-class model,” faster and more token-efficient.
Musk stated internal assessment finds Grok 4.5 “roughly comparable to Opus 4.7, but much faster.”
Grok 4.5 costs $2 per million input tokens and $6 per million output tokens.
Opus 4.7 costs $5 per million input and $25 per million output tokens.
OpenAI plans to release GPT 5.6 on Thursday, calling it its “strongest model yet.”
Key figures
Elon Musk, founder of SpaceXAI and X (subsidiary of SpaceXAI)
Sources: TechCrunch
