OpenAI: GPT-5.5 Pro
Highest-accuracy GPT-5.5 tier for slower, precision-heavy reasoning and coding
Cheapest input
$27.27
$/MTok · models.dev
Cheapest output
$163.64
$/MTok
Context
1.1M
tokens
Offers
14
3 sources
Offers
Same model, different listings. First-party, router, and aggregator rows stay separate so you can see the spread instead of a single blended number.
| Source | Provider | Input | Output | Cache read | Context |
|---|---|---|---|---|---|
| models.devcheapestopenai/gpt-5.5-pro | Poe | $27.27 | $163.64 | $0 | 400K |
| models.devopenai/gpt-5.5-pro | CrossModel | $30 | $180 | $0 | 1.1M |
| models.devopenai/gpt-5.5-pro | FastRouter | $30 | $180 | $0 | 1.1M |
| models.devopenai/gpt-5.5-pro | Impossibl | $30 | $180 | $3 | 1.1M |
| models.devopenai/gpt-5.5-pro | Kilo Gateway | $30 | $180 | $0 | 1.1M |
| models.devgpt-5.5-pro | OpenAI | $30 | $180 | $0 | 1.1M |
| OpenRouteropenai/gpt-5.5-pro | OpenRouter | $30 | $180 | $0 | 1.1M |
| models.devopenai/gpt-5.5-pro | OrcaRouter | $30 | $180 | $0 | 1.1M |
| models.devopenai/gpt-5.5-pro | Vercel AI Gateway | $30 | $180 | $0 | 1M |
| models.devopenai/gpt-5.5-pro | ZenMux | $30 | $180 | $0 | 1.1M |
| models.devgpt-5.5-pro | LLM Gateway | $30 | $180 | $0 | 1.1M |
| models.devgpt-5.5-pro | OpenCode Zen | $30 | $180 | $30 | 1.1M |
| LiteLLMgpt-5.5-pro | — | $30 | $180 | $3 | — |
| LiteLLMazure/gpt-5.5-pro | — | $30 | $180 | $3 | — |
Capabilities
- Reasoning
- Tool calling
- Structured output
- Attachments
- In: text
- In: image
- In: pdf
- In: file
- Out: text
- Out: image
Knowledge cutoff: 2025-12-01Released: 2026-04-23Family: gpt-pro