GPT-5.5 Pro vs Claude Opus 4.1
Claude Opus 4.1 is 2.3× cheaper than GPT-5.5 Pro on a blended basis. GPT-5.5 Pro has the larger context window at 1.1M tokens.
Side by side
Green marks the better value in each row where a comparison is meaningful.
| Attribute | GPT-5.5 Pro | Claude Opus 4.1 |
|---|---|---|
| Provider | OpenAI | Anthropic |
| Input / 1M tokens | $30.00 | $15.00 |
| Output / 1M tokens | $180 | $75.00 |
| Blended / 1M tokens | $67.50 | $30.00 |
| Cached input / 1M | - | $1.50 |
| Context window | 1.1M | 200K |
| Max output | 128K | 32K |
| Input modalities | file, image, text | image, text, file |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| Structured output | Yes | No |
| Prompt caching | No | Yes |
| Open weights | No | No |
| Knowledge cutoff | 2025-12-01 | 2025-01-31 |
| Released | April 24, 2026 | August 5, 2025 |
Frequently asked
Is GPT-5.5 Pro or Claude Opus 4.1 cheaper?
Claude Opus 4.1 is 2.3× cheaper than GPT-5.5 Pro on a blended basis.
What is the price difference between GPT-5.5 Pro and Claude Opus 4.1?
GPT-5.5 Pro costs $30.00 per million input tokens and $180 per million output tokens. Claude Opus 4.1 costs $15.00 and $75.00 respectively.
Which has the larger context window, GPT-5.5 Pro or Claude Opus 4.1?
GPT-5.5 Pro, at 1.1M tokens versus 200K.