OpenAI: GPT-5.5 Pro
by OpenAIOpenAI: GPT-5.5 Pro is a large language model from OpenAI. It costs $30.00 per million input tokens and $180 per million output tokens. Its context window is 1.1M tokens.
- Input / 1M tokens
- $30.00
- Output / 1M tokens
- $180
- Cached input / 1M
- -
- Context window
- 1.1M
Not supported
tokens
This model also charges $0.01 per search request
That is $10.00 per 1,000 requests, billed on top of the token prices above. On a typical 1,000-in / 500-out exchange the tokens cost $0.12, so the search fee is 8% on top. Per-token rankings elsewhere ignore this entirely.
Who serves it cheapest
1 hosts serve GPT-5.5 Pro. Same weights, same API - the price difference is pure margin and routing.
| Provider | Input / 1M | Output / 1M | Context | Throughput | Uptime 24h |
|---|---|---|---|---|---|
| OpenAICheapest | $15.00 | $90.00 | 1.1M | - | - |
About GPT-5.5 Pro
GPT-5.5 Pro is OpenAI’s high-capability model optimized for deep reasoning and accuracy on complex, high-stakes workloads. It features a 1M+ token context window (922K input, 128K output) with support for...
Specifications
| Model ID | openai/gpt-5.5-pro |
|---|---|
| Provider | OpenAI |
| Context window | 1.1M tokens |
| Max output | 128K tokens |
| Input modalities | file, image, text |
| Output modalities | text |
| Knowledge cutoff | 2025-12-01 |
| Open weights | No |
| Released | April 24, 2026 |
Cheaper alternatives
Models that cost less than GPT-5.5 Pro while keeping at least half its context window and every input modality it supports.
Frequently asked
How much does OpenAI: GPT-5.5 Pro cost?
$30.00 per million input tokens and $180 per million output tokens.
What is the context window of OpenAI: GPT-5.5 Pro?
1.1M tokens, with up to 128K tokens of output per request.
Does OpenAI: GPT-5.5 Pro have extra fees beyond per-token pricing?
Yes. OpenAI: GPT-5.5 Pro charges $0.01 per search request - $10.00 per 1,000 requests - on top of $30.00 per million input tokens and $180 per million output tokens. On a typical 1,000-input / 500-output exchange the search fee alone is 8% on top.
Confirm against the source: OpenAI official pricing.