GPT-5.5 — reviews, specs & pricing

Default frontier model for complex reasoning, coding, and analysis.

Summary

GPT-5.5 represents OpenAI's next-generation frontier model, specifically optimized for highly complex reasoning, advanced coding tasks, and multi-step analytical workflows. Operating primarily across chat and code modalities, it delivers unprecedented depth in problem-solving and logical synthesis. It serves as the go-to engine for developers and researchers requiring rigorous logical validation and sophisticated instruction-following capabilities.

Sample use case

A software engineering team at a financial institution can deploy GPT-5.5 to automate the refactoring and security auditing of legacy COBOL databases into modern, secure Python microservices. The model acts as an expert co-developer, translating highly complex business logic, identifying hidden edge-case vulnerabilities, and draft-testing the migration in real-time, drastically reducing transit times and human oversight errors.

Specifications

• Provider: openai
• License: closed
• Context: 400k tokens
• Input price: $2.5/M tok
• Output price: $10/M tok

Pros

• Unmatched coding proficiency and syntax generation
• Superior multi-step logical reasoning capabilities
• Extremely precise instruction-following
• Deep analytical comprehension of legacy codebases

Cons

• High computational latency during complex reasoning
• Expensive API usage costs for large-scale operations
• Limited mostly to text and code modalities

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