Create fine-tuning job

documented

Create a new fine-tuning job.

POST /fine_tuning/jobsFine-Tuningno implementation yet0 runs

Input

model

Base model to fine-tune

gpt-4o-mini-2025-04-16

training_file_id*

Training file ID

file-abc123

batch_size

Hyperparameter: batch_size

auto

learning_rate_multiplier

Hyperparameter: learning_rate_multiplier

auto

n_epochs

Hyperparameter: n_epochs

auto

suffix

Fine-tuned model suffix

my-custom-model

validation_file_id

Validation file ID (optional)

file-xyz789

Calls OpenAI as you (your API key is your account); keychains.dev holds the credentials.