A historic day for technology. OpenAI today unveiled GPT-5.3-Codex-Spark, a model designed for real-time coding that breaks all speed records by running on Cerebras hardware. Almost simultaneously, Google has released an enhanced version of its "Deep Think" mode for Gemini, reaching unprecedented milestones in solving complex mathematical problems and scientific reasoning. Meanwhile, OpenAI formally retires the GPT-4 series models, consolidating the absolute dominance of fifth-generation AI.