GPT-5.5

OpenAI officially released GPT-5.5 (codenamed "Spud") on April 23, 2026. This model represents a shift from raw parameter scaling to agentic efficiency, focusing on the model's ability to operate autonomously across software tools and perform complex, multi-step professional work with minimal human oversight.

Technical Specs & Pricing

GPT-5.5 builds on the "Thinking" architecture introduced in GPT-5.4, but with a major focus on reliability and "computer use" with agentic coding, reduced hallucinauts and visual precision. GPT 5.x improvements are depicted in the diagram.

For developers, the API pricing reflects a competitive move against the growing open-source market (like GLM-5.1 and Llama 4):

• Input Cost: $5.00 per million tokens.

• Output Cost: $30.00 per million tokens.

• Efficiency: OpenAI claims GPT-5.5 maintains the same latency as GPT-5.4 while using fewer tokens per task, effectively lowering the "cost-per-result" for complex workflows.

As early bird, I'm already started making my hands dirty on GPT5.5 !