GPT 5.5

GPT 5.5 by OpenAI, available on Aether API through one OpenAI-compatible API key. Priced at $3.5/M input, $21/M output. 1M context window.

Pricing

Provider	OpenAI
Model ID	gpt-5.5
Endpoint	https://aetherapi.dev/v1/chat/completions
Context window	1M
Input	$3.5/1M tokens
Output	$21/1M tokens
Official provider price	$5/1M input · $30/1M output

Supported endpoints

• POST https://aetherapi.dev/v1/chat/completions
• POST https://aetherapi.dev/v1/responses
• POST https://aetherapi.dev/v1/messages

How to call it

Send a request to https://aetherapi.dev/v1/chat/completions with your Aether API key:

curl https://aetherapi.dev/v1/chat/completions \
  -H "Authorization: Bearer sk-aetherapi-..." \
  -H "Content-Type: application/json" \
  -d '{"model":"gpt-5.5","messages":[{"role":"user","content":"Hello"}]}'

Related

Compare this model against every other model on the models page, or see Aether API pricing and the chat completions reference.