Quick Read

  • Microsoft’s ~27% OpenAI stake (~$135B) and $3.2B Anthropic investment gain both face margin pressure if Grok 4.6 forces frontier-wide inference price cuts.

  • Grok 4.6 matches frontier benchmarks at 60%+ lower cost than Claude Opus 5, threatening the inference margins Anthropic and OpenAI need ahead of their planned IPOs.

  • Azure grew 43% and crossed $100B in annual revenue, giving Microsoft a significant buffer even if AI pricing wars erode its equity stakes.

  • It sounds nuts, but SoFi1 is giving new Active Invest users up to $3,000 in stock for a limited time, and all it takes is a $50 deposit to get started.2 See for yourself (Sponsor)

The AI leadership race got a fresh jolt today. SpaceX unveiled Grok 4.6, and Elon Musk claimed on X that “Grok 4.6 is objectively #1 when considering intelligence, speed & cost.” That framing puts pressure squarely on OpenAI and Anthropic, the two labs where Microsoft (NASDAQ:MSFT) holds its most valuable AI equity stakes.

A composite image with Elon Musk's profile in the foreground, looking toward the right. The left background features a SpaceX rocket launching from Earth, enveloped in bright exhaust against a starry night sky. The right background shows a futuristic city highway at dusk or night, filled with numerous advanced electric vehicles, including a Tesla Cybertruck, moving along multiple lanes. A large, stylized silver and red 'X' logo is centered at the top of the image. 24/7 Wall St. Why the Grok 4.6 Launch Matters for Microsoft

Musk is not the only believer. Famed investor Gavin Baker posted on X that “Grok 4.6 is roughly the same performance as Fable 5 Max at an 85% discount. 80% cheaper for input tokens and 88% cheaper for output tokens. Pareto dominant. Grok 4.7 will be significantly better as is a much larger model with the Cursor and SpaceX data included in pretraining.”

Independent benchmarker Artificial Analysis confirmed the leap, writing that “SpaceXAI’s Grok 4.6 scores 61 on the Artificial Analysis Intelligence Index, joining the frontier in line with GPT-5.6 Sol, with standout agentic performance at lower cost.” Pricing sits at $2/$6 per 1M input/output tokens, 60%+ below Claude Opus 5 ($5/$25) and GPT-5.6 Sol ($5/$30), with cost per task at $0.84.

SoFi Active Invest is offering a limited-time promotion. Open an account, fund it with $50 or more, and you could receive up to $3,000 in complimentary stock for Active Invest accounts. See for yourself by clicking here now. (Sponsor)

Models are now judged on unit economics as much as capability. Anthropic is reportedly targeting an IPO in September or early October, and OpenAI has confidentially filed. Both are racing to public markets on the strength of improving inference margins. A Pareto-dominant Grok, backed by SpaceX’s balance sheet and Cursor’s coding data, threatens to compress those margins just as investors are being asked to underwrite them.

Microsoft’s Exposure Cuts Both Ways

Microsoft has meaningful exposure here. It holds a roughly 27% stake in OpenAI valued near $135 billion, plus an incremental $250 billion Azure commitment from OpenAI. It also booked a $3.20 billion gain on its Anthropic investment in Q4 FY2026, buoying earnings. If Grok’s aggressive pricing forces price cuts across the frontier, those equity marks and Azure workloads face real pressure.

The counterweight is Microsoft’s own scale. Q4 FY2026 revenue hit $90.01 billion, up 17.8% YoY, with non-GAAP EPS of $4.74. Azure grew 43% and crossed $100 billion in full-year revenue, Microsoft 365 Copilot passed 30 million paid seats, and commercial remaining performance obligations reached $678 billion, up 84%.

CEO Satya Nadella framed the strategy this way: “We are advancing the frontier on the cost-to-outcome curve, ensuring every customer can turn tokens into business results.” That cost-to-outcome language is exactly the battleground Grok 4.6 just entered.

MSFT earnings explorer MSFT Earnings Explorer — 24/7 Wall St. What to Watch Next

Microsoft shares trade at $492.12, up 27.8% over the past month, at a P/E near 28. The analyst target sits at $567.20. Watch whether Anthropic and OpenAI cut inference prices ahead of their IPO filings. If they do, Grok 4.6 has already dictated the terms.

Want Up To $3,000 In Stock? SoFi Is Giving New Active Invest Users Complimentary Stock

Looking to grow your money but unsure where to begin? SoFi Active Invest is offering a limited-time promotion—open a new Active Invest account, fund it with $50 or more, and you could receive up to $3,000 in complimentary stock.

From $0 commission trading3 to fractional shares4 and automated investing, this app is designed to simplify investing for everyone, whether you’re just starting or already experienced. Its easy to sign up and secure your bonus.(Sponsor)

Contact editorial@247wallst.com for any questions or corrections.