GPT-5.5
TrendingOpenAI · Active · Updated May 22, 2026
OpenAI's most advanced model with breakthrough reasoning, a massive 512K context window, and expert-level capabilities across every domain.
Input Price
$5.00/M
per million tokens
Output Price
$30.00/M
per million tokens
Context Window
524,288
tokens
Max Output
65,536
tokens
Technical Specifications
| Provider | OpenAI |
| Release Date | May 1, 2026 |
| Pricing Type | per token |
| Input Price | $5.00 / 1M tokens |
| Output Price | $30.00 / 1M tokens |
| Cached Input | $0.50 / 1M tokens |
| Context Window | 524,288 tokens |
| Max Output | 65,536 tokens |
| Input Modalities | text, image, audio, video |
| Output Modalities | text, image, audio |
| Status | active |
| Availability | api, web_app |
| Latency | medium |
| Rate Limit | 1,000 RPM |
| Pricing URL | View official pricing → |
| Docs URL | View documentation → |
Capability Scores
Coding97
Reasoning96
Math95
Image88
Speed62
Overview
GPT-5.5 represents OpenAI's pinnacle achievement in AI capability, setting new benchmarks across every major category. With a 512K context window, 97/100 coding score, and expert-level reasoning, it is designed for the most demanding AI workloads. GPT-5.5 excels at complex research, large-scale codebase analysis, and multi-step agentic workflows that require deep understanding and precise execution.
Pros
- +Highest coding score (97/100) — unbeatable on complex software engineering
- +512K context window — handles entire large codebases in one pass
- +Expert-level reasoning (96/100) and math (95/100)
- +Massive 65K max output tokens for long-form generation
Cons
- −Premium pricing at $5/$30 per million tokens
- −Slower inference speed due to model complexity
- −Lower rate limits (1K RPM) compared to smaller models
Compare with Alternatives
Use Cases
Advanced research and scientific discovery
Large-scale codebase analysis and migration
Complex multi-step agentic workflows