Pricingby GlyphGPT-5.5 Pro is OpenAI’s high-capability model optimized for deep reasoning and accuracy on complex, high-stakes workloads.
Ways to buy 2
| Way to buy | Input | Output | In / out per 1M | Cached | Vs list |
|---|---|---|---|---|---|
flex, cheapest | $15 | $90 | $15 / $90-50% vs list | n/a | -50% vs list |
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.
Kong AI Gateway$6,600+0%
LiteLLM$6,600+0%
Neon AI Gateway$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%
HeliconeNot offeredNot offered
A dash: not on that gateway's own model list. No published token fee: Martian Gateway, Portkey, TrueFoundry AI Gateway.
Related models
| In / out per 1M | Cheapest route | |||||||
|---|---|---|---|---|---|---|---|---|
OpenAI · 1.05MCheapest: $1 on OpenAI (flex) | $1 | $5 | $1 / $5 | $2 | 1.05M | $1 on OpenAI (flex) | · | GPT-6.1 Terra is the mid-tier model in OpenAI's GPT-6.1 series, priced below GPT-6.1 Sol. |
OpenAI · 1.05MCheapest: $1 on OpenAI (flex) | $1 | $5 | $1 / $5 | $2 | 1.05M | $1 on OpenAI (flex) | · | GPT-6.1 Terra Pro is the same underlying model as GPT-6.1 Terra, served with reasoning.mode set to pro for higher-quality responses on complex tasks. |
OpenAI · 1.05MCheapest: $2 on OpenAI (flex) | $2 | $10 | $2 / $10 | $4 | 1.05M | $2 on OpenAI (flex) | · | GPT-6.1 Sol is an upgrade to GPT-6 Sol from OpenAI, positioned below the flagship GPT-6 Astra in the GPT-6 series. |
OpenAI · 1.05MCheapest: $2 on OpenAI (flex) | $2 | $10 | $2 / $10 | $4 | 1.05M | $2 on OpenAI (flex) | · | GPT-6.1 Sol Pro is the same underlying model as GPT-6.1 Sol, served with reasoning.mode set to pro for higher-quality responses on complex tasks. |
About GPT-5.5 Pro
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. 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.