GPT-5.5 API
LLMGPT-5.5 remains available as a 1M-context model with vision and tool use alongside the newer 5.6 family.
- Input · USD / 1M tokens$0.45 USDOfficial price
$5 USD - Output · USD / 1M tokens$2.7 USDOfficial price
$30 USD - Savings91%
- Context1M
- Last verified2026-07-22
- View tool pricing and billing rules
What are we making today?
Bring an idea, a question, or a first draft.
01
Where it fits
GPT-5.5 remains available as a 1M-context model with vision and tool use alongside the newer 5.6 family.
Use it for integrations pinned to GPT-5.5 or to compare an existing workflow before adopting a 5.6 model ID.
02
Model capabilities
Vision
Accepts visual input alongside text for multimodal coding and analysis tasks.
Tool use
Can select and call tools in agent workflows that support structured tool use.
03
OpenAI-compatible API
Keep your client and change the base URL, API key, and model ID.
curl https://api.omniakey.com/v1/chat/completions \
-H "Authorization: Bearer $OMNIAKEY_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "gpt-5.5",
"messages": [{"role": "user", "content": "Explain this codebase"}],
"stream": true
}'04
Compatible coding tools
More OpenAI models
Frequently asked questions
How much does GPT-5.5 cost on OmniaKey?
OmniaKey charges $0.45 USD per 1M input tokens and $2.7 USD per 1M output tokens, in USD. Official prices are $5 USD and $30 USD; you save 91%.
What is the context window for GPT-5.5?
The listed context window is 1M. Actual usable limits can also depend on the client and upstream request format.
Which coding tools work with GPT-5.5?
The current catalog lists compatibility with Codex, Cursor, Cline, Aider. Use the model ID shown on this page when the client supports model selection.