GPT-5.6, Gemini 3.5 Pro face delays

The early summer AI model bottleneck highlights that safety alignment and reliability issues are proving harder to solve than the hype cycles suggest. For developers, this delay signals a temporary plateau where optimizing current-generation pipelines is more critical than preparing for immediate model upgrades.

• –**GPT-5.6 delays:** OpenAI's pushback to mid-July is reportedly driven by alignment issues, specifically resolving 'goblin' response contamination from the GPT-5.5 codebase.
• –**Gemini 3.5 Pro in limbo:** Google's delay past its planned June window follows frustration from the initial May preview, showcasing the gap between marketing announcements and production-ready deployments.
• –**Sonnet 5 as a stopgap:** Claude Sonnet 5's limited enterprise testing indicates Anthropic is aiming for a temporary bridge to manage model deprecations rather than a full public release.
• –**Developer impact:** The release slow-down gives teams breathing room to mature their RAG pipelines, fine-tuning setups, and agentic workflows using existing models instead of chasing new API integrations.