OpenAI
GPT-5.5 Pro is OpenAI’s high-capability model optimized for deep reasoning and accuracy on complex, high-stakes workloads. It features a 1M+ token context window (922K input, 128K output) with support for...
22.9
Quality Score
---
Arena ELO
1M
Parameters
1M
Context
This measures the amount of verifiable public evidence we have, not how capable the model is. A missing field means it has not been verified yet, not that its value is zero.
13 of 22 public signals
Use this section to answer one simple question first: how much outside evidence do we have that this model performs well? Structured benchmark scores appear first, then official provider evidence, then live arena signal.
This model has official provider benchmark evidence, but not a normalized independent benchmark table yet.
A full normalized benchmark row is not available for this model yet.
Official benchmark evidence is already available below, so this release is still being tracked while the normalized table catches up.
Sign in to join the discussion
0
Downloads
0
Likes
Apr 2026
Released
3/5 signals
2/4 signals
5/5 signals
1/4 signals
2/4 signals
Gaps we are still tracking
These are recent benchmark or leaderboard claims from official provider sources. They are useful for freshness and context, but they are not treated the same as normalized independent benchmark rows.
Introducing GPT-5.5
Learn about OpenAI’s latest model: GPT-5.6 Compare models (opens in a new window) Loading… Share Model capabilities Model capabilities Agentic coding Knowledge work Scientific research Next-generation inference efficiency Advancing cybersecurity for everyone’s safety Availability and pricing Evaluations Model capabilities Agentic coding Knowledge work Scientific research Next-generation inference efficiency Advancing cybersecurity for everyone’s safety Availability and pricin
View sourceIntroducing GPT-5.2
Introducing GPT-5.2 | OpenAI Skip to main content Research Products Business Developers Company Foundation (opens in a new window) Log in Try ChatGPT (opens in a new window) Research Products Business Developers Company Foundation (opens in a new window) Try ChatGPT (opens in a new window) Login OpenAI December 11, 2025 Product Release Introducing GPT‑5.2 The most advanced frontier model for professional work and long-running agents. Loading… Share Model performance Model per
View sourceGPT-5.5 Pro Model | OpenAI API
ChatGPT Home API Codex Docs Guides, concepts, and product docs for Codex Use cases Example workflows and tasks teams can take on with ChatGPT or Codex Docs Use cases Resources ChatGPT Plugins Extend ChatGPT and Codex Workspace Agents Trigger published ChatGPT workspace agents Commerce Build commerce flows in ChatGPT Ads Publish and measure ads in ChatGPT Resources Showcase Demo apps to get inspired Blog Learnings and experiences from developers Cookbook Notebook examples for
View sourceGPT-5.5 Pro Model | OpenAI API
ChatGPT Home API Codex Docs Guides, concepts, and product docs for Codex Use cases Example workflows and tasks teams can take on with ChatGPT or Codex Docs Use cases Resources ChatGPT Plugins Extend ChatGPT and Codex Workspace Agents Trigger published ChatGPT workspace agents Commerce Build commerce flows in ChatGPT Ads Publish and measure ads in ChatGPT Resources Showcase Demo apps to get inspired Blog Learnings and experiences from developers Cookbook Notebook examples for
View source