ML Research Pulse

OpenAI GPT-5.5 Release

OpenAI GPT-5.5 Release

Key Questions

What is OpenAI's GPT-5.5?

GPT-5.5 is an agentic coding, math, and science powerhouse for ChatGPT and Codex, excelling in multi-step tasks and context preservation while dominating benchmarks. It represents a pivot to inference efficiency, praised by Sam Altman.

What are the key features of GPT-5.5?

It handles multi-step tasks with strong context preservation and leads in benchmarks for coding, math, and science. The model was self-built using AI and positions as a super app.

How does GPT-5.5's pricing and efficiency compare?

GPT-5.5 has 2x the pricing of predecessors but is token-efficient, emphasizing inference efficiency improvements. This shift has been highlighted positively by Sam Altman.

What concerns have been raised about GPT-5.5?

Reports indicate GPT-5.5 has lower Chain-of-Thought (CoT) controllability than other GPT-5 series models. It launches amid cyber risks and follows an accidental breach similar to Anthropic's incident.

What is the development status of GPT-5.5?

GPT-5.5 is currently in development. It aims to enhance ChatGPT and Codex capabilities significantly.

GPT-5.5 agentic coding/math/science powerhouse for ChatGPT/Codex: multi-step tasks/context preservation, benchmark dominance; inference efficiency pivot praised by Sam Altman, 2x pricing but token-efficient, self-built via AI, super app amid cyber risks.

Sources (3)
Updated Apr 24, 2026