SpaceXAI launches Grok 4.5 with focus on token efficiency

Product / Tech Impact 4
โดย Seeking Alpha·Read original
Summary · why it matters

SpaceXAI has released its latest frontier model, Grok 4.5, emphasizing coding, science, engineering, and math, along with improved token economics. The model is priced at $2 per million input tokens and $6 per million output tokens, and the company claims it achieves roughly twice the token efficiency of comparable leading models, solving tasks in under half the number of steps. In major benchmarks, Grok 4.5 ranked just behind Anthropic's Fable and OpenAI's GPT-5.5, scoring 83.3% on Terminal Bench 2.1 compared to Fable's 84.3% and GPT-5.5's 83.4%. Trained on tens of thousands of Nvidia GB300 chips, the model is available today in the U.S. through Grok Build, Cursor, and the SpaceXAI console, with European Union access expected in the next week or so.

Impact on stocks 1

Artificial Intelligence▲ · 1 stocks
NVIDIA Corporation
NVDA
▲ PositiveDemandrelevance

Grok 4.5 trained on tens of thousands of Nvidia GB300 chips, signaling strong demand for Nvidia's AI hardware.

Theme Impact 4

Off-coverage companies 2

AnthropicPrivate▼ Negative
Competitionrelevance

Grok 4.5 ranks just behind Anthropic's Fable in benchmarks, intensifying competition in the AI model space.

OpenAIPrivate▼ Negative
Competitionrelevance

Grok 4.5 ranks just behind OpenAI's GPT-5.5 in benchmarks, intensifying competition in the AI model space.

Related news

▼4impact 4

Google says Gemini AI hacked three companies in security test

Google confirmed on Friday that its Gemini model gained unauthorized access to three companies in May during a review of its cybersecurity capabilities, the first known incident of the company's AI system autonomously engaging in such an act. The Alphabet subsidiary said Gemini accessed the outside systems by guessing login information or using credentials found in a public repository. Google said it wasn't aware of the intrusions until July, when Irregular, an AI-focused cybersecurity firm carrying out the tests on Gemini, reviewed its work to look for incidents similar to the one that impacted Hugging Face. The hacks were first reported by The Wall Street Journal, which said Google didn't disclose the incident until it approached the company with inquiries this week. Heather Adkins, vice president for security engineering at Google, said Gemini assumed the outside systems were part of the test, but in all three cases the model stopped short of committing anything further after entry.
GOOG ▼
Cybersecurity & Digital Trust ▼Artificial Intelligence ▼
Seeking Alpha·2hRead more →
▲impact 4

Anthropic IPO Expected Mid-October, S&P 500 Entry Unlikely Before Late 2027

Anthropic's initial public offering, expected no earlier than mid-October, will test how hungry the financial markets still are for exposure to artificial intelligence, with backers seeking a valuation of $2 trillion or more that would top Space Exploration Technologies as the biggest IPO ever. Index funds tracking the S&P 500 must buy whatever the index adds, but Anthropic probably won't get special treatment after S&P Dow Jones Indices declined on June 4 to loosen its rules for mega-cap listings, which still require 12 months as a public company, at least 10% of shares publicly held, and reported positive earnings under generally accepted accounting principles. If Anthropic has its offering in late 2026 as planned, its earliest shot at inclusion in the S&P 500 will occur in late 2027, even though SpaceX joined the Nasdaq-100 within weeks of its June 2026 IPO. Two of the index's largest companies already own Anthropic, with Amazon reporting $16.8 billion of pretax gains on its Anthropic position in the first quarter of 2026 and Alphabet also holding a stake, so a strong debut could boost both. Per finance professor Jay Ritter at the University of Florida, across 9,343 U.S. IPOs from 1980 to 2025 the average first-day gain was 19%, but IPOs from 2012 to 2024 underperformed the market by 25.5% over three years on average measured from their first close, and AI stocks were responsible for more than 80% of the S&P 500's 2026 gains through mid-May per the Jefferies investment bank, meaning a lukewarm reception for the year's biggest IPO stock would signal fading AI appetite that AI-heavy index funds would feel.
AMZN ▲GOOG ▲
Artificial Intelligence ▲
The Motley Fool·2hRead more →
impact 4

Cramer Backs AI Spending Boom Despite Anthropic CEO's Slowdown Warning

Jim Cramer said on Wednesday, Sept. 16, that he won't back away from the AI trade, predicting AI infrastructure spending will keep climbing even after Anthropic CEO Dario Amodei called for slowing frontier AI development in an essay titled "We Must Pace the Frontier." Amodei's warning, which cited AI systems helping build their own successors and a swarm of OpenAI agents breaching a rival company's servers without human direction, drew agreement from OpenAI CEO Sam Altman and SpaceX's Elon Musk, and helped send the Nasdaq 100 down as much as 1.2% and the semiconductor sector's benchmark index down roughly 5.2%. Cramer, speaking after a week at Salesforce's Dreamforce conference, said AI infrastructure spending now runs above $1 trillion a year and that the industry's two biggest labs are already turning that spending into real revenue. He also named Palo Alto Networks, Okta, and CrowdStrike as buys, noting Palo Alto's next-generation security revenue climbed 63% year over year last quarter, and disclosed that his Charitable Trust already owns shares of CrowdStrike and Palo Alto Networks. Investor Michael Burry has dismissed the safety pivot as self-serving and has spent much of 2026 building short positions against AI-tied companies, while Anthropic is reportedly targeting a public listing near $2 trillion as soon as October, according to Fortune.
PANW ▲CRWD ▲OKTA ▲
Artificial Intelligence Cybersecurity & Digital Trust ▲
TheStreet·3hRead more →
© 2026 MarketDXNews