API Key
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Playground
POST
https://api.openai.com/v1/chat/completions
https://api.openai.com/v1/responses
🔗
developer
Response Format
❓
Helper
JSON object mode (no schema sent)
Structured outputs.
JSON object
requires developer description instead.
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gpt-5.2-2025-12-11
gpt-5.2-chat-latest
gpt-5.1-2025-11-13
gpt-5-2025-08-07
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gpt-5-nano-2025-08-07
o3-2025-04-16
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gpt-4.1-2025-04-14
gpt-4.1-mini-2025-04-14
gpt-4.1-nano-2025-04-14
o3-mini-2025-01-31
o1-2024-12-17
gpt-4o-2024-11-20
gpt-4o-2024-08-06
gpt-4o-mini-2024-07-18
gpt-4o-2024-05-13
gpt-4-turbo-2024-04-09
gpt-3.5-turbo-0125
gpt-4-0125-preview
gpt-3.5-turbo-1106
gpt-4-1106-preview
gpt-4-0613
gpt-4-0314
Reasoning model
max_completion_tokens
Output budget
Reasoning controls
Reasoning Effort
Verbosity
Null
to omit parameter.
Sampling controls
Temperature
Top P
Frequency Penalty
Presence Penalty
Logit Bias
Token IDs (0–200 000) → (−100 to +100)
Service Tier: Priority
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name
description (optional)
strict
True: CFG enforced schema
schema (JSON Schema draft-compatible object)
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