Maximum-capability tier of the GPT-5.2 family (dated snapshot). Thinks longer with more compute to deliver the most reliable answers on the hardest reasoning and coding tasks.
Test this model instantly in the Console Playground โ no code required
Copy usage instructions for Claude, ChatGPT, or other AI
| Token Type | Credits | USD Equivalent |
|---|---|---|
| Input Tokens | 39,018 | $26.01 |
| Output Tokens | 312,144 | $208.10 |
* 1,500 credits โ $1 (actual charges may vary based on usage)
curl -X POST "https://api.core.today/llm/openai/v1/chat/completions" \
-H "Content-Type: application/json" \
-H "Authorization: Bearer cdt_your_api_key" \
-d '{
"model": "gpt-5.2-pro-2025-12-11",
"messages": [
{
"role": "user",
"content": "Review this database migration plan for a zero-downtime rollout across 40 services and identify every failure mode with mitigations."
}
],
"max_completion_tokens": 16000
}'| Parameter | Type | Required | Default | Description |
|---|---|---|---|---|
messages | array | Yes | - | Array of message objects with role and content |
model | string | Yes | gpt-5.2-pro-2025-12-11 | Model identifier (dated snapshot id) |
max_completion_tokens | integer | No | - | Maximum tokens in response (includes internal reasoning tokens). Note: use max_completion_tokens, not max_tokens |
reasoning_effort | string | No | - | Reasoning effort level: low, medium, or high lowmediumhigh |
stream | boolean | No | false | Enable Server-Sent Events streaming |
Hardest reasoning task with GPT-5.2 Pro
curl -X POST "https://api.core.today/llm/openai/v1/chat/completions" \
-H "Content-Type: application/json" \
-H "Authorization: Bearer cdt_your_api_key" \
-d '{
"model": "gpt-5.2-pro-2025-12-11",
"messages": [
{
"role": "user",
"content": "Review this database migration plan for a zero-downtime rollout across 40 services and identify every failure mode with mitigations."
}
],
"max_completion_tokens": 16000
}'POST /llm/openai/v1/chat/completions