Dexcom is developing its next-generation continuous glucose monitoring system, the Dexcom G8. The company promises significant improvements in sensor size, measurement accuracy and reliability. Here is what we know about the expected release date, new technology and key differences between Dexcom G8 and Dexcom G7.
When will Dexcom G8 be released?
According to information presented by Dexcom in 2026, the new sensor is expected to launch in late 2027 or early 2028.
The final release date will depend on clinical trial results and regulatory review timelines. Dexcom confirmed this schedule during its third-quarter 2026 earnings call.
Development is progressing, but Dexcom G8 is not yet commercially available. Availability may also vary by country, and international launches could take place later than the initial release.
How will Dexcom G8 differ from Dexcom G7?
Dexcom G8 is being developed as a new technology platform rather than a minor update to the existing G7 system.
The main improvements announced by the manufacturer include:
- A sensor body approximately 50% smaller in volume than Dexcom G7.
- New electronics and sensor architecture.
- Improved measurement accuracy and reliability.
- Self-adapting calibration technology.
- Enhanced connectivity and a platform designed for future capabilities.
The goal is to make continuous glucose monitoring more accurate, comfortable and convenient for everyday use.
How much smaller will Dexcom G8 be?
Dexcom has announced that the G8 sensor will be approximately 50% smaller in body volume compared with the G7.
The new wearable is expected to have a thinner design and occupy less space on the skin. This could make it more discreet during daily activities, exercise and sleep.
However, a smaller sensor does not automatically mean better adhesive performance. Final details about the adhesive patch and wearing experience will become available closer to launch.
What is adaptive calibration in Dexcom G8?
One of the most important innovations in Dexcom G8 is its self-adapting sensor technology.
Current Dexcom systems use factory calibration. However, individual physiology varies, and changes in tissue conditions can affect glucose sensor performance during wear.
Dexcom G8 will use a new algorithm to analyse additional sensor signals and automatically adapt to these physiological differences.
According to Dexcom, this technology is intended to reduce inaccurate readings and improve consistency over time.
The process is designed to work automatically. It does not mean that users will need to perform frequent manual calibrations.
How long will Dexcom G8 last?
The final approved wear duration of the commercial Dexcom G8 sensor has not yet been fully confirmed.
Dexcom is already expanding its range of longer-wear CGM devices, including certain versions of Dexcom G7 designed for 15 days of use.
However, it is important not to assume that the new G8 will have exactly the same specifications.
The official wear duration, warm-up time and any additional operating conditions will need to be confirmed when Dexcom publishes the final product documentation.
Will Dexcom G8 measure ketones?
Dexcom is developing the G8 platform with future multi-analyte monitoring capabilities in mind.
The company has discussed the possibility of measuring additional substances, including ketones and potassium.
However, the initial Dexcom G8 product is expected to focus on glucose monitoring.
Additional analyte monitoring capabilities are planned for later development, so users should not assume that the first G8 sensor will measure both glucose and ketones.
What have clinical studies shown?
During its October 2026 earnings call, Dexcom reported encouraging results from ongoing clinical studies of the new G8 platform.
The company highlighted improvements in accuracy and sensor performance.
However, detailed publicly available results are still limited, and Dexcom has not provided a final numerical MARD value for the commercial G8 sensor.
For this reason, it is too early to promise a specific accuracy percentage or make a definitive numerical comparison with Dexcom G7.
What information is still missing?
Before purchasing the new system, users should review the final official instructions and product specifications.
The most important details to verify include:
- the approved wear duration of each sensor version;
- smartphone and app compatibility;
- compatibility with insulin pumps and automated insulin delivery systems;
- age restrictions;
- availability and conditions of use in each country.
Compatibility with Dexcom G7 should not be automatically assumed for Dexcom G8. The new sensor will require its own officially supported device and pump compatibility information.
Should you wait for Dexcom G8?
If you need continuous glucose monitoring today, it is generally better to choose a currently available system that meets your needs and works with your other diabetes devices.
Dexcom G7 remains a modern CGM option for monitoring glucose levels and trends throughout the day and night.
You can explore available sensors and accessories in the Dexcom G7 collection at Diabet12.
Dexcom G8 looks promising thanks to its smaller design and advanced adaptive calibration technology. However, until the final specifications, regulatory approvals and availability are confirmed, there is no reason to postpone necessary glucose monitoring solely to wait for the next generation.
We will continue following Dexcom announcements and share updates about the G8 launch and officially confirmed features.
Sources: Dexcom Investor Day, May 14, 2026, and Dexcom Q3 2026 earnings call. This article is provided for informational purposes only.