Ways to buy 2
| Way to buy | Input | Output | In / out per 1M | Cached | Vs list |
|---|---|---|---|---|---|
 OpenAIflex, cheapest | $15 | $90 | $15 / $90-50% vs list | n/a | -50% vs list |
| OpenAI API The lab's own API | $30 | $180 | $30 / $180List price | n/a | List price |
USD per 1M tokens; batch $15 in, $90 out on the lab's API. Regions are separate routes.
Through a gateway
Your own numbers100M input and 20M output tokens a month: $6,600 direct.
Helicone$6,600+0%
Kong AI Gateway$6,600+0%
LiteLLM$6,600+0%
Vercel AI Gateway$6,600+0%
Cloudflare AI Gateway$6,930+5%
Requesty$6,930+5%
Eden AI$6,963+5.5%
OpenRouter$6,963+5.5%
No published token fee: Martian Gateway, Portkey, TrueFoundry AI Gateway.
Related models
| In / out per 1M | Cheapest route | ||||||
|---|---|---|---|---|---|---|---|
| GPT-6 Luna OpenAI · 1.05MCheapest: $0.1 on OpenAI (flex) | $0.1 | $0.5 | $0.1 / $0.5 | $0.2 | 1.05M | $0.1 on OpenAI (flex) | · |
| GPT-6 Luna Pro OpenAI · 1.05MCheapest: $0.1 on OpenAI (flex) | $0.1 | $0.5 | $0.1 / $0.5 | $0.2 | 1.05M | $0.1 on OpenAI (flex) | · |
| GPT-6 Sol OpenAI · 1.05MCheapest: $2 on OpenAI (flex) | $2 | $10 | $2 / $10 | $4 | 1.05M | $2 on OpenAI (flex) | · |
| GPT-6 Sol Pro OpenAI · 1.05MCheapest: $2 on OpenAI (flex) | $2 | $10 | $2 / $10 | $4 | 1.05M | $2 on OpenAI (flex) | · |
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.
Takes files, image, text in and returns text. First listed Apr 25, 2026. Up to 128K output tokens. Blended price $67.5 per 1M tokens at 3 input to 1 output. Overall score 5 on leadersboard.fru.dev (rank 26). Model id gpt-5-5-pro.
Price history
List price since Apr 25, 2026, from Internet Archive snapshots of the OpenRouter catalog, then daily reads.
Questions
How much does GPT-5.5 Pro cost?
$30 per million input tokens and $180 per million output tokens, or $15 and $90 through the Batch API.
What is the context window of GPT-5.5 Pro?
1.05M tokens, with up to 128K tokens of output.
Where is GPT-5.5 Pro cheapest?
Of 2 routes tracked, OpenAI is cheapest at $15 input and $90 output per million tokens.
Sources: OpenRouter's public model catalog and each provider's own pricing page, read every morning at 05:00 UTC; gateway fees re-read every Monday. List prices: your contract may differ. Logos via logo.dev; trademarks belong to their owners.