GPT-5.5 Pro
Updated Sep 11, 2026
gpt-pro1.1M context128k max outputreleased Apr 23, 2026ReasoningTool calling
Official (OpenAI)
$180
output per 1M tokens
Providers
19
offering this model
Spread
1.4×
max / min output
Offers
Metered per-token prices. Cheapest input and output are highlighted; † marks a context-tier surcharge.
| Provider | 1M input | 1M output | 1M cache read | 1M cache write | Context |
|---|---|---|---|---|---|
| Poe | Cheapest$27.2727 | Cheapest$163.6364 | — | — | 400k |
| Cloudflare AI Gateway | $30 | $180 | — | — | 1.0M |
| CrossModel | †$30 | $180 | — | — | 1.1M |
| Eden AI | †$30 | $180 | $3 | — | 1.1M |
| FastRouter | $30 | $180 | — | — | 1.1M |
| Impossibl | †$30 | $180 | $3 | — | 1.1M |
| Kilo Gateway | $30 | $180 | — | — | 1.1M |
| DevPass (LLM Gateway) | †$30 | $180 | — | — | 1.1M |
| LLM Gateway | †$30 | $180 | — | — | 1.1M |
| Neon | †$30 | $180 | — | — | 1.1M |
| OpenAI | †$30 | $180 | — | — | 1.1M |
| OpenCode Zen | $30 | $180 | $30 | — | 1.1M |
| OpenRouter | †$30 | $180 | — | — | 1.1M |
| Opper | †$30 | $180 | — | — | 1.1M |
| OrcaRouter | †$30 | $180 | — | — | 1.1M |
| Requesty | $30 | $180 | — | — | 1.1M |
| Vercel AI Gateway | $30 | $180 | — | — | 1.0M |
| ZenMux | †$30 | $180 | — | — | 1.1M |
| Venice AI | $37.5 | $225 | — | — | 1.0M |