What will Waymo or Alphabet report as the weekly paid ride figure at the time of Alphabet's Q4 2026 earnings call (expected late January/early February 2027)?

rationale:

Summary Waymo has experienced rapid growth over the past year, achieving approximately 500,000 weekly paid rides in Q1 2026 2 sources. Company leadership has set a highly ambitious public target to exceed 1 million paid rides per week by the end of 2026 2 sources. To hit this volume, assuming an operational efficiency of 20-25 trips per vehicle per day, Waymo must expand its active fleet to roughly 7,000-10,000 vehicles 2 sources. However, achieving this target requires overcoming significant near-term friction. Between February and May 2026, Waymo's fleet grew at a rate of roughly 264-300 vehicles per month to reach a total of 3,791 vehicles 2 sources. Maintaining this pace would yield an end-of-year fleet of approximately 5,900 to 6,000 vehicles. At 20 rides per day, this mathematically limits the company to around 825,000 to 840,000 rides per week.

Furthermore, organic growth showed signs of decelerating early in the year, dropping to an addition of just 2,700 rides per week in March 2026 businessinsider.com, with California trip volumes flattening reddit.com. This momentum was further blunted in May 2026 by significant operational disruptions. Following incidents with flooded roads and construction zones, Waymo was forced to issue a fleet-wide software recall, halting freeway rides in multiple legacy markets and suspending operations entirely in five to six expansion cities 44 sources. Given these setbacks, the estimated median outcome sits at 825,000 weekly rides, reflecting a robust recovery and expansion in the second half of the year that ultimately falls modestly short of the 1 million target.

Strongest Arguments for Higher Values

• Waymo recently secured $16 billion in fresh capital, providing enormous financial leverage to rapidly scale vehicle deployments and operations thedriverlessdigest.com.
• The company is executing major supply agreements to integrate Ojai (Zeekr) and Hyundai Ioniq 5 vehicles into the fleet, potentially increasing the monthly hardware deployment rate well beyond historical averages 2 sources.
• Alphabet has strong structural incentives to meet its highly publicized 1 million ride milestone, meaning they could temporarily surge vehicle supply, boost promotional discounts, or push operations aggressively at year-end.
• The planned 2026 launch of five new major markets—Denver, Detroit, Las Vegas, San Diego, and Washington DC—offers significant runway to capture untapped demand 9to5google.com.

Strongest Arguments for Lower Values

• Expanding from roughly 3,800 to over 7,000 vehicles in less than eight months is an incredibly aggressive timeline that far outpaces recent production and deployment run rates.
• The May 2026 software recall and subsequent operational halts directly impacted nearly half of Waymo's active footprint. Without a permanent fix immediately available in late May, this disruption diverts critical engineering focus away from fleet expansion 2 sources.
• Growth in legacy markets is plateauing. California ride growth flattened in early 2026 reddit.com, and monthly volume gains dropped sharply prior to the spring disruptions businessinsider.com.
• Ramping up operations in newly launched cities traditionally takes months, limiting how much these new markets can contribute to the final Q4 2026 figure.

Key Uncertainties

• Software and Regulatory Resolution: How quickly Waymo can deploy a permanent software fix for the flooding and construction-zone navigation issues, allowing full service resumption.
• Hardware Ramp-Up Speed: Whether Waymo's supply chain can dramatically accelerate the integration of new vehicle models into the active fleet beyond the historical average of roughly 300 vehicles per month.
• Adoption Speed in New Markets: The velocity at which new expansion cities scale their daily ride volume to compensate for slowing organic growth in mature legacy markets.