GPT-5.5 Pro by OpenAI is a Pro-tier model for complex goals, tool use, workflow completion, and checking its work across multi-step tasks.
Capabilities, design details, and architectural traits
GPT-5.5 Pro is the higher-tier version of GPT-5.5 for users who need the model to carry more of a task through to completion. It is positioned around complex goals, tool use, and multi-step work rather than short chat turns.
| Trait | Documented detail that distinguishes GPT-5.5 Pro |
|---|---|
| Pro-tier access | GPT-5.5 Pro is offered to Pro, Business, and Enterprise users. |
| Task completion focus | It is built to understand complex goals and carry more tasks through to completion. |
| Tool use | The model is described as able to use tools while working on tasks. |
| Self-checking behavior | It is documented as able to check its work. |
| Workflow style | It is aimed at moving across tools until a task is finished. |
| Best-fit use cases | It is positioned for agentic coding, knowledge work, research, data analysis, and document work. |
GPT-5.5 Pro is not framed as a general chat upgrade. Its identity is tied to longer task execution across tools, with more emphasis on completion and verification than on brief answers.
The Pro label is part of the model name and points to a higher-access tier inside the GPT-5.5 family. The public framing separates it from the base GPT-5.5 model by its intended use for more demanding work.
No independent benchmark data is available for this model yet.
Evaluate specifications, pricing, and independent benchmark indices
| Model Details | |||
|---|---|---|---|
| General Info | |||
| Provider | OpenAI | Anthropic | Anthropic |
| Release Date | April 23, 2026 | July 24, 2026 | June 9, 2026 |
| Knowledge Cutoff | Dec 2025 | May 2026 | - |
| Context & Limits | |||
| Context Window | 1.1M Best Context Window | 1M | 1M |
| Pricing (per 1M tokens) | |||
| Input Pricing | Free Best Input Pricing | $5 | $10 |
| Output Pricing | Free Best Output Pricing | $25 | $50 |
| Modalities | |||
| Inputs | fileimagetext | textimage | textimagefile |
| Outputs | text | text | text |
| Benchmarks (0-100) | |||
| Intelligence Index | - | 63.1 Best Intelligence Index | 62.1 |
| Coding Index | - | 78.0 Best Coding Index | 76.5 |
| Agentic Index | - | 59.2 Best Agentic Index | 56.6 |
Graduate-level reasoning and expert Q&A evaluation.
Extremely difficult logical reasoning and knowledge.
Logical reasoning over long context windows.
Independent evaluation data provided by Artificial Analysis. To view the latest benchmarks and full details, visit their official site.
