Google has reportedly postponed the public release of its flagship Gemini 3.5 Pro AI model, with efforts to improve its coding capabilities cited as a key reason behind the delay. The development was first reported by Bloomberg, which said the model is now months behind Google’s original rollout timeline.
The company introduced the Gemini 3.5 family during Google I/O in May, launching Gemini 3.5 Flash immediately while indicating that the more advanced Gemini 3.5 Pro would become available the following month. However, the model has yet to reach developers or the general public.
According to Bloomberg’s report, Google has been working to strengthen Gemini 3.5 Pro’s performance in software development tasks, an area where competition among leading AI companies has intensified. The report says the company updated the model’s training data in an effort to improve coding abilities, but the results reportedly did not meet internal expectations.
The delay comes at a time when rivals such as OpenAI and Anthropic continue to roll out increasingly capable AI models, particularly for coding and enterprise applications. Bloomberg also reported that some Google employees have expressed concerns about the company’s ability to keep pace in the rapidly evolving AI race.
Responding to the reports, a Google spokesperson said the company is currently testing Gemini 3.5 Pro, an upgraded version of Gemini 3.5 Flash, and other AI models with selected partners. However, Google has not announced a revised launch timeline for the flagship model.
For now, Gemini 3.5 Flash remains the only publicly available model in the Gemini 3.5 series. While the delay does not affect Google’s existing AI products or Search experiences, it underscores the challenges involved in developing frontier AI models that meet increasingly high performance standards before release.