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Google’s Gemini 3.5 Pro AI model remains unreleased months behind schedule, causing a $425 billion decline in Alphabet’s market value. The delay underscores the risks of AI development setbacks for major tech firms.
Google has not released its highly anticipated Gemini 3.5 Pro AI model, which was expected in June 2026, leading to a $425 billion decline in Alphabet’s market capitalization within weeks.
This delay, confirmed by multiple reports, highlights the high stakes and market sensitivity surrounding AI development timelines for major technology companies.
On May 19, 2026, Google announced during I/O that Gemini 3.5 Pro would be available in June. However, as of July 2026, the model remains unreleased, with reports indicating it is several months behind schedule due to challenges in improving coding capabilities and reliability issues, including hallucination rates.
Bloomberg reported on July 16 that Google is still testing the model internally, and a rebuild on a native Gemini 3 foundation is underway, but no official timeline has been provided. Despite this, the market reacted sharply, with Alphabet’s stock dropping 4.4% the day after the report, erasing approximately $200 billion in value. The total loss over the past month, combining losses from DeepMind researcher departures and market reactions, approaches $425 billion.
Financially, Google’s core metrics remain strong, with Q1 revenue at $109.9 billion and Cloud revenue up 63% to $20 billion, suggesting that the market’s reaction is driven primarily by concerns over AI leadership and future competitiveness rather than immediate financial performance.
Implications of AI Development Delays for Market Leadership
The $425 billion loss underscores how critical AI progress is to investor confidence and market valuation for tech giants like Google. Delays in flagship AI models can lead to significant valuation re-pricing, affecting not only stock prices but also future business prospects and competitive positioning in the rapidly evolving AI landscape.
Market reactions reflect fears that Google may be falling behind competitors like OpenAI and Anthropic, which have launched more advanced or reliable models. This incident illustrates the high stakes of AI development, where delays can have tangible financial consequences and influence industry dominance.
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Recent AI Development Timeline and Market Reactions
In early 2026, Google announced Gemini 3.5 Pro would be available in June, aligning with its broader AI strategy to lead in large language models. However, multiple reports from Bloomberg and other outlets have indicated that the model is delayed due to difficulties in improving coding capabilities and reliability, including hallucination issues. The delay follows a series of departures from DeepMind, where key researchers left for competitors, fueling concerns about Google’s AI pipeline.
Meanwhile, competitors like GPT-5.6 Sol and Grok 4.5 launched publicly in July, gaining market attention and contracts. Google’s inability to meet its own deadlines now places it at a competitive disadvantage, especially as enterprise evaluations and contracts are being finalized based on shipped models rather than promised timelines.
Despite the setbacks, Google has shipped a smaller, competitive model called Gemini 3.5 Flash, which is available and performing well, but it lacks the flagship status of the delayed Gemini 3.5 Pro. The market’s focus has shifted from announced plans to actual shipped products, intensifying the pressure on Google to deliver.
“Google is months behind schedule on Gemini 3.5 Pro, primarily over efforts to improve coding capabilities, with disappointing results from recent training updates.”
— Bloomberg, Julia Love and Davey Alba
Unconfirmed Details and Ongoing Developments
It remains unclear exactly when Google will release Gemini 3.5 Pro, as the company has not provided an updated timeline. Reports of a rebuild on the native Gemini 3 foundation and reliability issues are unconfirmed by Google, and specifications such as token window size and pricing are still speculative. The full extent of internal challenges and whether the delay will extend beyond current estimates are also unknown.
Next Milestones and Market Expectations for Google AI
Google is expected to provide an official update on Gemini 3.5 Pro’s status and timeline in upcoming quarterly reports or company statements. The industry will closely watch for signs of progress, potential new deadlines, or alternative strategies such as accelerating smaller models or open-weight releases. Market reactions will likely continue to be sensitive to any new developments, especially as enterprise contracts are finalized based on shipped models.
Additionally, competitors’ launches and AI advancements will influence investor sentiment and Google’s strategic decisions moving forward.
Key Questions
Why is Google’s Gemini 3.5 Pro model delayed?
According to reports, the delay is primarily due to challenges in improving the model’s coding capabilities and reliability, including issues with hallucination rates and internal rebuilding efforts. Google has not officially confirmed these reasons.
How much has Google’s delay affected its market value?
Market estimates suggest that the delay has contributed to a loss of approximately $425 billion in Alphabet’s market capitalization over the past month, driven by investor fears of losing AI leadership.
Will Google release an alternative AI model in the meantime?
Yes, Google has shipped a smaller, competitive model called Gemini 3.5 Flash, which is available and performing well, but it does not carry the flagship status of Gemini 3.5 Pro.
What are the implications for AI industry competition?
The delay places Google at a potential disadvantage compared to competitors like OpenAI and Anthropic, which have launched more advanced models recently. The industry is closely watching how Google addresses these delays and whether it can regain its leadership position.
Source: ThorstenMeyerAI.com
