Oklo vs. X-Energy: which one produces nuclear power first?
Oklo stock investors are watching a speed race: Oklo targets a 2028 startup for its Aurora-INL reactor in Idaho after breaking ground in September 2025, while X-Energy has not broken ground or selected a site. Oklo appears likelier to produce nuclear power first; X-Energy's standard NRC licensing path may better support a commercial fleet later.
AI data centers need enormous electricity—a typical 100-megawatt facility can use as much power as about 80,000 U.S. homes. Oklo (NYSE: OKLO) and X-Energy (NASDAQ: XE) are both pitching small modular reactors (SMRs) as part of the answer, but their timelines and regulatory strategies diverge sharply.
Key Takeaways
- Oklo broke ground on Aurora-INL in Idaho in September 2025 and targets a 2028 startup under the DOE Reactor Pilot Program.
- X-Energy has no groundbreaking, construction, or site yet, but pursues a standard NRC path toward a full commercial operating license.
- Oklo's Meta deal calls for a 1.2-gigawatt Ohio campus; first phase is hoped around 2030, though scale-up may slip later.
- Oklo stock is down roughly 40–45% year-to-date amid SMR skepticism, heavy insider selling, and 17% short interest.
- An estimated 2,441 data centers could be online by December 2028, intensifying the race for new power.
Which company will generate nuclear power first?
On Oklo's second-quarter earnings call, CFO Richard Bealmear said the company is "gaining greater visibility into opportunities to bring forward critical work that supports Aurora INL's planned 2028 start-up." That makes 2028 the clearest near-term target for actual power generation.
X-Energy, by contrast, has not held a groundbreaking ceremony and has no construction underway. In a straight head-to-head on first electrons, Oklo holds the edge today.
Why does Oklo have a head start over X-Energy?
Oklo was selected for the Department of Energy's Reactor Pilot Program, which streamlines testing and licensing for its Aurora-INL powerhouse in Idaho Falls. Ground broke there in September 2025—concrete progress X-Energy has not matched.
Oklo is also pursuing broader commercial deals. In January 2026 it announced an agreement with Meta Platforms to develop a nuclear campus in south central Ohio delivering 1.2 gigawatts to Meta data centers. Pre-construction is scheduled for 2027, with general construction in late 2028 or 2029 and a hoped first phase around 2030. Oklo does not yet hold the NRC license for that Ohio facility.
What does X-Energy's licensing strategy change?
Unlike Oklo's pilot-program route, X-Energy is moving through the Nuclear Regulatory Commission's standard licensing path. That process is slower, but it leads to a full commercial operating license—potentially a smoother path to building a fleet of reactors rather than a single early unit.
The trade-off is speed versus scale. One Aurora powerhouse online in 2028 would not alone meet demand from thousands of new data centers. Future Oklo deployments still require their own regulatory approvals, while X-Energy must prove its design safe and secure approvals before its first build.
What should oklo stock investors weigh beyond the timeline?
Being first could mean real revenue and operational data by 2028, plus early customer relationships in a market where hyperscalers are scrambling for power. Meta is not alone—Microsoft signed a 20-year agreement with Constellation Energy to reopen a reactor at Three Mile Island in Pennsylvania.
But Oklo's SMR technology remains unproven at commercial scale, and investors have been cautious. Oklo traded near a $7.5 billion market cap with shares down about 45% in 2026 as of late August. Seeking Alpha noted $1.65 billion in cash at end of Q2 against a $48.5 million net loss and negative free cash flow of $73.3 million, plus insiders selling over 38 million shares in 12 months.
For broader context on how AI infrastructure is reshaping energy bets, see our Future Tech & AI Wonders coverage. Oklo may win the first-reactor race; whether that translates into durable oklo stock gains depends on licensing, delivery, and surviving a potential SMR shakeout.