Context Window
1.1M
Input price / 1M tokens
$1.751M tokens
Output price / 1M tokens
$14.001M tokens
Cached input / 1M tokens
$0.171M tokens
Max Completion
128K
Input Modalities
text, image
Output Modalities
text
reasoningFunction callingChatVisionJSONStreaming
Description
OpenAI GPT-5.3 chat variant, general dialogue and text generation
Available Providers
AllToken can route requests to the providers below based on route priority and policy.
ProviderContext LengthInput PriceOutput PriceCached / MLatency p50Throughput
Best For
OpenAI GPT-5.3 chat variant, general dialogue and text generation
How To Use This Model
Use the exact model ID shown below. This is the safest way to avoid call failures, variant mismatches, or incorrect route assumptions.
curl https://api.alltoken.ai/v1/chat/completions \
-H "Authorization: Bearer sk-your-key" \
-H "Content-Type: application/json" \
-d '{
"model": "gpt-5.3-chat",
"messages": [
{"role": "user", "content": "Hello!"}
]
}'Supported Parameters
temperaturetop_pmax_tokenstoolsresponse_formatreasoning_effortweb_searchAPI Key Setup
Smart Routing
Let the platform choose the best provider path automatically.
Default Model
If a request does not specify a model, default the key to gpt-5.3-chat.
Forced Model
Always override incoming requests and lock the key to gpt-5.3-chat.