OpenAIgpt-5.5
openai/gpt-5.5
featuredtextcodingreasoning
OpenAI gpt-5.5: a GPT-series chat and reasoning model available through the Chat Completions and Responses APIs. Text and image input.
Pricing
USD per 1M tokens, billed per token. Cached input applies where the provider caches prompts.
- Input
- $5.00
- Output
- $30.00
- Cached input
- $0.500
Specifications
- Context length
- 922K
- Max output tokens
- —
- Input
- text, image
- Output
- text
- Endpoints
- openai, anthropic, openai-response
- Released
- Apr 23, 2026
- Alias accepted
- gpt-5.5
Example request
curl https://api.nxioai.com/api/v1/chat/completions \
-H "Authorization: Bearer $NXIO_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model":"openai/gpt-5.5","messages":[{"role":"user","content":"Hello"}]}'Price history
Every price change opens a new version. Past requests are billed with the version in effect at the time.
| Effective | Until | Input | Output | Cached input | Source |
|---|---|---|---|---|---|
| Oct 6, 2026 | current | $5.00 | $30.00 | $0.500 | sync |