#OpenAIReleasesGPT-5.5

GPT-5.5 is OpenAI's most powerful AI system, described as “a new class of intelligence” capable of autonomous, multi-step work. Unlike its predecessors, GPT-5.5 acts as a true agent, writing and debugging code, filling out spreadsheets, and performing in-depth research without requiring constant human supervision. The model was released on April 23, 2026, under the codename "Spud".

⚙️ Key Features & Architectural Upgrades

GPT-5.5 is the first fully retrained base model since GPT-4.5, with a significantly reworked architecture. It features a 1 million token context window, allowing it to process and understand vastly larger amounts of text. Developed in deep collaboration with NVIDIA, GPT-5.5 is specifically designed to run on the latest NVIDIA GB200 systems, ensuring maximum efficiency.

The model focuses on agentic capabilities, enabling it to perform tasks such as writing code, analyzing data, and managing multi-step workflows autonomously. It also powers a more robust Codex coding agent, making it a versatile tool for developers, researchers, and enterprises.

🚀 Performance Gains & Benchmark Results

Initial benchmarks indicate GPT-5.5 surpasses its predecessor and leading competitors:

· General Intelligence: Achieved 84.9% on GDPval, surpassing Claude Opus 4.7 (80.3%).
· Coding Expertise: Scored 58.6% on SWE-Bench Pro (real-world GitHub issue resolution). In internal testing, it achieved 73.1% on Expert-SWE (20-hour human tasks vs GPT-5.4's 68.5%).
· Terminal-Bench 2.0: Scored 82.7%, notably higher than Claude Opus 4.7's 69.4%.

💰 Pricing & Availability

Available to ChatGPT Plus, Pro, Business, and Enterprise users. API pricing for GPT-5.5 is $5 per million input tokens** and **$30 per million output tokens (double GPT-5.4). The high-performance GPT-5.5 Pro starts at $30 per million input tokens** and **$180 per million output tokens. Long prompts (>272K tokens) incur 2x input and 1.5x output pricing.

🔒 Safety Focus

GPT-5.5 comes with OpenAI's strongest safeguards, including preparedness evaluations, domain-specific testing, targeted checks for advanced biology and cybersecurity capabilities, and third-party expert assessments.

💎 Final Thoughts

GPT-5.5 represents a shift from traditional AI to autonomous agents, bringing OpenAI closer to creating a true “super app”. For developers, researchers, and businesses that rely on AI for complex, multi-step tasks, GPT-5.5 offers a glimpse into the next era of human-AI collaboration.

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