---
title: "Changes to Create fine-tuning job"
method: POST
path: "/fine_tuning/jobs"
---

# Changes to Create fine-tuning job

`POST /fine_tuning/jobs`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 3 of 88 revisions.

- **2026-10-26** `410e6429083a`: 12 info
- **2026-10-06** `487892d3954e`: 2 info
- **2026-10-05** `7f654af7f94f`: 21 breaking, 2 warning, 13 info

## Changes

- **2026-10-26** `410e6429083a`: 12 info
  - added the new optional request property `method/reinforcement/grader/oneOf[subschema #4: ScoreModelGrader]/input/items/content/oneOf[subschema #1: Eval content item]/oneOf[subschema #2: Input text]/prompt_cache_breakpoint/ttl`
  - added the new optional request property `method/reinforcement/grader/oneOf[subschema #4: ScoreModelGrader]/input/items/content/oneOf[subschema #2: An array of Input text, Output text, Input image, and Input audio]/items/oneOf[subschema #2: Input text]/prompt_cache_breakpoint/ttl`
  - added the new optional request property `method/reinforcement/grader/oneOf[subschema #5: MultiGrader]/graders/additionalProperties/oneOf[subschema #4: ScoreModelGrader]/input/items/content/oneOf[subschema #1: Eval content item]/oneOf[subschema #2: Input text]/prompt_cache_breakpoint/ttl`
  - added the new optional request property `method/reinforcement/grader/oneOf[subschema #5: MultiGrader]/graders/additionalProperties/oneOf[subschema #4: ScoreModelGrader]/input/items/content/oneOf[subschema #2: An array of Input text, Output text, Input image, and Input audio]/items/oneOf[subschema #2: Input text]/prompt_cache_breakpoint/ttl`
  - added the new optional request property `method/reinforcement/grader/oneOf[subschema #5: MultiGrader]/graders/additionalProperties/oneOf[subschema #5: LabelModelGrader]/input/items/content/oneOf[subschema #1: Eval content item]/oneOf[subschema #2: Input text]/prompt_cache_breakpoint/ttl`
  - added the new optional request property `method/reinforcement/grader/oneOf[subschema #5: MultiGrader]/graders/additionalProperties/oneOf[subschema #5: LabelModelGrader]/input/items/content/oneOf[subschema #2: An array of Input text, Output text, Input image, and Input audio]/items/oneOf[subschema #2: Input text]/prompt_cache_breakpoint/ttl`
  - added the optional property `method/anyOf[#/components/schemas/FineTuneMethod]/reinforcement/grader/oneOf[subschema #4: ScoreModelGrader]/input/items/content/oneOf[subschema #1: Eval content item]/oneOf[subschema #2: Input text]/prompt_cache_breakpoint/ttl` to the response with the `200` status
  - added the optional property `method/anyOf[#/components/schemas/FineTuneMethod]/reinforcement/grader/oneOf[subschema #4: ScoreModelGrader]/input/items/content/oneOf[subschema #2: An array of Input text, Output text, Input image, and Input audio]/items/oneOf[subschema #2: Input text]/prompt_cache_breakpoint/ttl` to the response with the `200` status
  - added the optional property `method/anyOf[#/components/schemas/FineTuneMethod]/reinforcement/grader/oneOf[subschema #5: MultiGrader]/graders/additionalProperties/oneOf[subschema #4: ScoreModelGrader]/input/items/content/oneOf[subschema #1: Eval content item]/oneOf[subschema #2: Input text]/prompt_cache_breakpoint/ttl` to the response with the `200` status
  - added the optional property `method/anyOf[#/components/schemas/FineTuneMethod]/reinforcement/grader/oneOf[subschema #5: MultiGrader]/graders/additionalProperties/oneOf[subschema #4: ScoreModelGrader]/input/items/content/oneOf[subschema #2: An array of Input text, Output text, Input image, and Input audio]/items/oneOf[subschema #2: Input text]/prompt_cache_breakpoint/ttl` to the response with the `200` status
  - added the optional property `method/anyOf[#/components/schemas/FineTuneMethod]/reinforcement/grader/oneOf[subschema #5: MultiGrader]/graders/additionalProperties/oneOf[subschema #5: LabelModelGrader]/input/items/content/oneOf[subschema #1: Eval content item]/oneOf[subschema #2: Input text]/prompt_cache_breakpoint/ttl` to the response with the `200` status
  - added the optional property `method/anyOf[#/components/schemas/FineTuneMethod]/reinforcement/grader/oneOf[subschema #5: MultiGrader]/graders/additionalProperties/oneOf[subschema #5: LabelModelGrader]/input/items/content/oneOf[subschema #2: An array of Input text, Output text, Input image, and Input audio]/items/oneOf[subschema #2: Input text]/prompt_cache_breakpoint/ttl` to the response with the `200` status
- **2026-10-06** `487892d3954e`: 2 info
  - added the optional property `error/misalignment/review_target` to the response with the `400` status
  - added the optional property `error/misalignment/review_target` to the response with the `429` status
- **2026-10-05** `7f654af7f94f`: 21 breaking, 2 warning, 13 info
  - the request property `integrations` became not nullable
  - the request property `integrations/items/wandb/entity` became not nullable
  - the request property `integrations/items/wandb/name` became not nullable
  - the request property `seed` became not nullable
  - the request property `suffix` became not nullable
  - the request property `validation_file` became not nullable
  - removed `subschema #1, subschema #2` from the `hyperparameters/learning_rate_multiplier` request property `oneOf` list
  - the response property `hyperparameters` became nullable for the status `200`
  - the response property `seed` became nullable for the status `200`
  - the response property `hyperparameters` became optional for the status `200`
  - the response property `hyperparameters/n_epochs` became optional for the status `200`
  - response property `estimated_finish` list-of-types was widened by adding types `null` to media type `application/json` of response `200`
  - response property `fine_tuned_model` list-of-types was widened by adding types `null` to media type `application/json` of response `200`
  - response property `finished_at` list-of-types was widened by adding types `null` to media type `application/json` of response `200`
  - response property `integrations` list-of-types was widened by adding types `null` to media type `application/json` of response `200`
  - response property `trained_tokens` list-of-types was widened by adding types `null` to media type `application/json` of response `200`
  - response property `validation_file` list-of-types was widened by adding types `null` to media type `application/json` of response `200`
  - the `error` response's property type changed from `object` to no type for status `200`
  - removed the required property `error/code` from the response with the `200` status
  - removed the required property `error/message` from the response with the `200` status
  - removed the required property `error/param` from the response with the `200` status
  - added the new `paused` enum value to the `status` response property for the response status `200`
  - added the new `pausing` enum value to the `status` response property for the response status `200`
  - added the new optional request property `metadata`
  - added the new optional request property `method`
  - request property `hyperparameters` deprecated
  - added `subschema #1, subschema #2` to the `hyperparameters/learning_rate_multiplier` request property `oneOf` list
  - added 'else' subschema to the response body for the status `200`
  - added 'if' subschema to the response body for the status `200`
  - added the non-success response with the status `400`
  - added the non-success response with the status `429`
  - added the optional property `hyperparameters/batch_size` to the response with the `200` status
  - added the optional property `hyperparameters/learning_rate_multiplier` to the response with the `200` status
  - added the optional property `metadata` to the response with the `200` status
  - added the optional property `method` to the response with the `200` status
  - added `subschema #1, subschema #2, subschema #3` to the `error` response property `anyOf` list for the response status `200`

---

[Operation](https://skmtc.dev/omnistack-sh/apis/openai-api/docs/fine_tuning/jobs/post.md) - [API](https://skmtc.dev/omnistack-sh/apis/openai-api.md) - [Page](https://skmtc.dev/omnistack-sh/apis/openai-api/changes/fine_tuning/jobs/post)