GPT-5.5 Pro
gpt-pro
Highest-accuracy GPT-5.5 tier for slower, precision-heavy reasoning and coding
ReasoningTool CallingAttachmentsStructured Output
Context Window
1.1M
Max Output
128K
Temperature
No
Open Weights
No
Knowledge Cutoff
2025-12-01
Released
2026-04-23
Last Updated
2026-04-23
Modalities
Input:TextImagePDF
→Output:Text
Available Providers (7)
| Provider | Input /1M | Output /1M | Cache Read /1M | Cache Write /1M | Reasoning | Status |
|---|---|---|---|---|---|---|
 Vercel AI Gateway | Rp 541.012 | Rp 3.246.067 | — | — | effort | — |
 ZenMux | Rp 541.012 | Rp 3.246.067 | — | — | effort | — |
 OrcaRouter | Rp 541.012 | Rp 3.246.067 | — | — | effort | — |
 Poe | Rp 491.828 | Rp 2.950.971 | — | — | effort | — |
 Kilo Gateway | Rp 541.012 | Rp 3.246.067 | — | — | effort | — |
 OpenRouter | Rp 541.012 | Rp 3.246.067 | — | — | effort | — |
 FastRouter | Rp 541.012 | Rp 3.246.067 | — | — | effort | — |