Published on April 23, 2026
OpenAI has rolled out its latest model, GPT-5.5, marking a significant milestone as the first fully retrained base model since GPT-4.5. Previously, GPT-4.5 and its predecessors set the standard in natural language processing and multi-tasking. Developers relied heavily on these earlier models, which streamlined workflows and set benchmarks in AI performance.
With the introduction of GPT-5.5, codenamed “Spud,” the landscape is shifting. Designed to tackle complex multi-step tasks with minimal human input, Spud raises the bar for what AI can achieve. However, developers are currently facing a delay in API access as OpenAI conducts further safety evaluations.
The new model has been noted for its advancements in agentic coding and knowledge work, allowing users to experience improved efficiency and capability. Early tests reveal that Spud maintains the same per-token latency as GPT-5.4, ensuring a seamless experience even with enhanced functionalities.
The impact of GPT-5.5 could be profound, particularly as the AI industry grapples with heightened competition from models like Anthropic’s Claude. As businesses await the final approval for API access, the stakes are high. Enhanced AI capabilities may force other companies to adapt quickly or fall behind in the race for technological supremacy.
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