GPT-4o mini is a fast and cost-efficient small model from OpenAI, designed for focused tasks and scalable production workloads. It supports both text and image inputs with text output, including Structured Outputs, and provides a 128,000-token context window with up to 16,384 output tokens. With support for fine-tuning, streaming, function calling, and predicted outputs, GPT-4o mini is well-suited for intent classification, keyword extraction, translation, tag generation, lightweight assistants, content processing, and applications that require lower cost and latency while maintaining reliable quality.
Create chat completion
All API requests must be authenticated using a Bearer token in the Authorization header. Please ensure your API key is active.Authorization: Bearer sk-xxxxxx
These parameters come from the selected model form_schema. Switching models updates this list and the request example.
system_prompt?stringGlobal instructions or persona for the model.
prompt*stringimage_urls?arraySupports multi-image understanding (optional).
image_detail?stringtemperature?numberHigher values make output more random, lower more deterministic.
top_p?numberNucleus sampling threshold; an alternative to temperature.
presence_penalty?numberIncreases the tendency to talk about new topics.
frequency_penalty?numberReduces the likelihood of repeating the same text verbatim.
seed?numberA fixed seed yields more reproducible results (optional).
max_completion_tokens?numberresponse_format?stringstream?booleanid?stringParameter description for Id
object?stringParameter description for Object
created?integerParameter description for Created
model?stringModel ID used
choices?arrayParameter description for Choices
usage?objectParameter description for Usage
prompt_tokens?integerParameter description for Prompt Tokens
completion_tokens?integerParameter description for Completion Tokens
total_tokens?integerParameter description for Total Tokens
prompt_tokens_details?objectParameter description for Prompt Tokens Details
completion_tokens_details?objectParameter description for Completion Tokens Details
system_fingerprint?stringParameter description for System Fingerprint
error?objectParameter description for Error
message?stringError Message
type?stringError Type
param?stringRelated Parameters
code?stringError Code
error?objectParameter description for Error
message?stringError Message
type?stringError Type
param?stringRelated Parameters
code?stringError Code