GPT-5.5 — AI Model Review & Pricing
OpenAI's latest flagship model. Significant improvements in reasoning, coding, and general capability over GPT-5. Available via API and ChatGPT.
Specifications
| Attribute | Value |
|---|---|
| Lab | OpenAI |
| Tags | Intelligent Reasoning Multimodal |
| Release Date | 2026-04 |
| Context Window | 128,000 tokens |
| Input Price / 1M | $12.50 |
| Output Price / 1M | $50.00 |
| Input Modalities | Text |
| Output Modalities | Text |
Strengths
- Strong general knowledge
- Deep reasoning chain-of-thought
- Reliable structured output
- Broad tool-use capability
- Excellent multilingual support
Weaknesses
- Creative writing less nuanced than Claude
- High cost for API usage
Best For
- General purpose tasks
- Tool calling & agents
- Data analysis
- Structured output pipelines
In Depth: GPT-5.5
Summary
GPT-5.5 is an AI model from OpenAI ranked #8 of 125 on the LMRank leaderboard.
Released 2026-04. It currently appears in the Overall category on LMRank. It supports Text input and produces Text output, with a context window of 128,000 tokens. Input pricing is $12.50 per 1M tokens and output is $50.00 per 1M tokens on OpenRouter.