OpenAI released GPT-5.5, an agentic model designed to autonomously work through complex tasks by switching between multiple tools, now available via API as of April 24. The model is positioned as OpenAI's smartest and most intuitive offering to date, with improved coding and research capabilities.

DeepSeek released DeepSeek-V4, a new open-source Mixture-of-Experts model series claimed as the most powerful open-source platform, challenging offerings from OpenAI and Anthropic. The release marks a significant shift in open-weight model capability, with DeepSeek matching frontier proprietary models on multiple benchmarks.

OpenAI's official announcement confirms GPT-5.5 and GPT-5.5 Pro are now available in the API as of April 24, 2026, with updated system cards describing additional safeguards. GPT-5.5 represents a new class of agentic intelligence with enhanced autonomy for multi-tool task execution.

SpaceX announced an option to acquire Cursor, maker of AI-powered coding software, for $60 billion in common stock and equity awards, preempting a planned $2 billion funding round. The deal signals major tech conglomerates consolidating AI developer tools and infrastructure.

Google announced a $40 billion investment in Anthropic, starting with $10 billion initial funding and $30 billion in future commitments over multiple years. The mega-round reflects intensifying competition for frontier AI capabilities among Big Tech players.