McDonald's ends IBM AI drive-thru order-taking pilot
McDonald's terminated its global IBM AI drive-thru pilot in June 2024 after widespread order inaccuracies and handling of diverse accents; the project began in 2021 and faced multiple reported mishaps. The partnership with IBM was ended, and coverage notes issues with order accuracy and cross-lane misreads.
The technology struggled to interpret different accents and dialects, undermining order accuracy.
Key facts
- What
- McDonald's terminated its global IBM AI drive-thru pilot in June 2024 after widespread order inaccuracies and handling of diverse accents; the project began in 2021 and faced multiple reported mishaps.
- Incident date
- Jun 18, 2024
- Who
- McDonald's
- Failure mode
- Hallucination
- AI surface
- Voice Agent
- Severity
- Medium
What happened
In June 2024, McDonald’s confirmed it was ending its global partnership with IBM for automated order-taking (AOT) after a pilot that began in 2021. The system was plagued by inaccuracies, with customers reporting that the AI added unwanted items or strange extras to their orders. Some instances involved the system capturing orders from adjacent vehicle lanes instead of the intended customer.
What broke inside the model
- 01 · TriggerA user asks for a fact, a citation, or a figure.
- 02 · Model stepThe model writes a fluent, confident answer.
- 03 · Control gapNothing ties the claim back to a real source.
- 04 · FailureA fabricated fact ships as if it were verified.
- 05 · ConsequenceThe false claim reaches a customer, a court, or the public.
Confidence holds, and even spikes, as the claim detaches from any source.
The failure occurred within the system's natural language understanding and acoustic modeling, which struggled to accurately process various accents and dialects. This led to incorrect entity extraction and a failure to correctly process stop commands or modifications to the order.
What it cost
Sources
- PressMcDonald’s is ending its test run of AI-powered drive-thrus with IBMapnews.com
- PressMcDonalds ends AI drive-throughs after order errorsbbc.com
- PressMcDonald's is ending its drive-thru, AI testrestaurantbusinessonline.com
Cite this entry
https://failureindex.ai/failures/mcdonald-ends-ibm-drive-thru-orderAI Failure Index. "McDonald's ends IBM AI drive-thru order-taking pilot" (FI-0216). Realm Labs. https://failureindex.ai/failures/mcdonald-ends-ibm-drive-thru-order (indexed Jun 5, 2026).Data fields CC-BY 4.0, prose citation permitted. Incident ID FI-0216. Full dataset at /data.
Note from Realm Labs, the Index steward
How Realm would have caught this
- Prism
- OmniGuard
- AI Detection & Response (AIDR)
A runtime layer that watches the model's internal state can flag the moment a model commits to a claim it has no support for, and hold or reroute the response before it reaches a user. Realm reads those signals in real time rather than grading the transcript after the fact.