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Modelby OpenAI

GPT-5.5

GPT-5.5 is OpenAI's flagship model as of April 2026, positioned as faster and more capable for complex professional tasks including coding, research, and data analysis. It represents a significant step up from GPT-5 in both reasoning depth and agentic capability.

Provider
OpenAI
Released
Apr 23, 2026
Weights
Closed

Capabilities

  • Reasoning
  • Code Generation
  • Tool Use
  • Data Analysis
  • Agentic Workflows
  • Computer Use

Best For

  • Agentic Workflows
  • Coding
  • Research
  • Data Analysis
  • Dependency Management
  • Security Analysis

Overview

GPT-5.5 is OpenAI's flagship model released in April 2026, delivering meaningfully improved performance over GPT-5 across professional tasks — particularly coding, complex reasoning, research synthesis, and data analysis. It is designed for engineers and teams who need a reliable, highly capable model for demanding multi-step workflows.

For engineering teams focused on dependency management, GPT-5.5 brings the reasoning depth needed to handle ambiguous upgrade scenarios, reason about transitive dependency implications, and generate high-quality code for automated remediation.

Key Capabilities

  • Advanced Reasoning — stronger chain-of-thought performance than GPT-5 for complex technical problems
  • Code Generation — state-of-the-art code synthesis and debugging across all major languages
  • Agentic Tool Use — native function-calling for multi-step autonomous task execution
  • Data Analysis — strong quantitative reasoning for structured data and dependency metadata
  • Computer Use — capable of interacting with browser and desktop environments for automation tasks

Use Cases for Engineering Teams

  • Complex Dependency Conflict Resolution — reason through multi-layer dependency conflicts and generate resolution strategies
  • Agentic Upgrade Execution — autonomously plan, execute, and verify dependency upgrade workflows
  • Security Research Workflows — analyse CVE advisories, assess exploitability, and generate patching plans
  • Automated Code Migration — generate full migration scripts for major library version upgrades
  • Dependency Risk Scoring — build and operate automated risk scoring pipelines for tech stack health monitoring

Technical Specifications

  • Context Window: Not publicly specified at launch
  • Pricing: Not publicly announced at launch
  • Open Weight: No
  • Release Date: 2026-04-23

Provider

GPT-5.5 is developed by OpenAI. For the latest information, visit the official documentation.

Documentation

View Official Docs

Similar Models

Tags

frontierreasoningcode generationopenaigpt 5agentictool use
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08:28Z[DRIFT]@types/supertest@types/supertest is 4 major versions behind (spec: ^2.0.16, latest: 6.0.3).
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