SpaceX Just Unveiled Grok 4.6. Musk Calls it “Objectively #1” In AI. Anthropic, OpenAI and This Stock May Be in Trouble.
Elon Musk just declared his latest AI model objectively number one in intelligence, speed, and cost, and the timing could not be worse for two companies that Microsoft is betting billions on.
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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 | MSFT Price Prediction) holds its most valuable AI equity stakes.
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.
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.
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.
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Gerelyn Terzo is the author of dividend investing handbook "Dividend Investing Strategies: How to Have Your Cake & Eat It Too." A veteran financial journalist, she covers agri-finance for outlets like Global AgInvesting and the broader stock market and personal finance for 24/7 Wall Street. She began at CNBC and later helped launch Fox Business in New York. Gerelyn currently resides in Woodland Park, Colorado and dabbles in nature photography as a hobby.
