GPT 5.1

GPT 5.1 by OpenAI, available on Aether API through one OpenAI-compatible API key. Priced at $0.875/M input, $7/M output. 400K context window.

Pricing

Provider	OpenAI
Model ID	gpt-5.1
Endpoint	https://aetherapi.dev/v1/chat/completions
Context window	400K
Input	$0.875/1M tokens
Output	$7/1M tokens
Official provider price	$1.25/1M input · $10/1M 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-5.1","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.