Choose flagship
Use the top model when correctness, reasoning depth, and coding reliability matter more than cost.
GPT collection
GPT API Family
Compare GPT-5.5 and GPT-5.4 for reasoning, coding, agent workflows, and production chat APIs.
Model comparison
| Model | Best For | Input | Output | Context | Cached |
|---|---|---|---|---|---|
GPT-5.5 Flagship | Advanced reasoning, complex coding, and highest-quality production agents. | 1 credit / 1K | 4 credits / 1K | 1M | 0.1 credit / 1K |
GPT-5.4 Balanced | Strong reasoning and reliability for mature production workflows. | 1 credit / 1K | 4 credits / 1K | 400K | 0.1 credit / 1K |
Choose balanced
Use value models for assistants, automation, support, and workflows that still need strong quality.
Choose budget
Use lightweight models for routing, classification, extraction, and high-volume background tasks.
Unified access
One API surface for the whole family
Keep product code stable while changing models, providers, pricing, and channel routes from the platform.
curl https://devnextapiany.mexxxxai.win/api/v1/chat/completions \
-H "Authorization: Bearer $APIANY_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "gpt-5.5",
"messages": [{ "role": "user", "content": "Plan an agent workflow" }]
}'