OpenAI: GPT-5.5openai
Bottom Line
OpenAI: GPT-5.5: $5.00/1M input, $30.00/1M output, 1.1M context, CPS grade B. GPT-5.5 is OpenAI’s frontier model designed for complex professional workloads, building on GPT-5.4 with stronger reasoning, higher reliability, and improved token efficiency on hard tasks. It features a 1M+ token...
API Pricing (per 1M tokens)
| Input | $5.00 |
| Output | $30.00 |
| Cache Read | — |
| Cache Write | — |
| Blended (3:1) | $11.25 |
Specs & Performance
| Context Length | 1.1M |
| Max Output | 128K |
| Intelligence | 38 |
| Coding | 75 |
| Math | — |
| Speed | — |
| TTFT | — |
| CPS Grade | B |
| Input / Output Modalities | file, image, text → text |
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FAQ
How much does the OpenAI: GPT-5.5 API cost?
OpenAI: GPT-5.5 costs $5.00/1M input tokens and $30.00/1M output tokens. Blended cost at a 3:1 ratio is about $11.25/1M tokens.
What is the context window of OpenAI: GPT-5.5?
OpenAI: GPT-5.5 supports a 1.1M token context window with up to 128K output tokens.
Is OpenAI: GPT-5.5 worth it?
OpenAI: GPT-5.5 has a CPS grade of B (score 57), intelligence index 38, coding index 75. Use the compare page to benchmark against rivals.