Apr 23

Apr 21

Released GPT Image 2, a state-of-the-art image generation model for image generation and editing. GPT Image 2 supports flexible image sizes, high-fidelity image inputs, token-based image pricing, and Batch API support with a 50% discount.

Apr 15

Mar 17

Mar 16

Updated the gpt-5.3-chat-latest slug to point to the latest model currently used in ChatGPT.

Mar 13

Updated our image encoder to fix a small bug with input_image inputs in GPT-5.4. Some image understanding use cases may now see improved quality. No action is required.

Mar 12

Expanded the Sora API with reusable character references, longer generations up to 20 seconds, 1080p output for sora-2-pro, video extensions, and Batch API support for POST /v1/videos. 1080p generations on sora-2-pro are billed at $0.70 per second. Learn more here.

Mar 12

Added POST /v1/videos/edits for editing existing videos. This will replace POST /v1/videos/{video_id}/remix, which will be deprecated in 6 months. Learn more here.

Mar 5

Mar 3

Released gpt-5.3-chat-latest to the Chat Completions and Responses API. This model points to the GPT-5.3 Instant snapshot currently used in ChatGPT. Read more here.

Feb 24

Expanded input_file support to accept more document, presentation, spreadsheet, code, and text file types. Learn more here.

Feb 24

Released phase to the Responses API. It labels an assistant message as intermediate commentary (commentary) or the final answer (final_answer). Read more here.

Feb 24

Released gpt-5.3-codex to the Responses API. Read more here.

Feb 23

Launched WebSocket mode for the Responses API. Learn more here.

Feb 23

Feb 10

Batch API is now supported for GPT Image models: gpt-image-1.5, chatgpt-image-latest, gpt-image-1, and gpt-image-1-mini.

Feb 10

Updated the gpt-5.2-chat-latest slug to point to the latest model currently used in ChatGPT.

Feb 10

Launched support for Skills in the Responses API. We support Skills across both local execution and hosted container-based execution.

Feb 10

Launched a new Hosted Shell tool, as well as support for networking in containers.

Feb 9

Added support for application/json requests on /v1/images/edits for GPT image models. JSON requests use images (and optional mask) with image_url or file_id references instead of multipart uploads.

Feb 3

We have optimized our inference stack for API customers and GPT-5.2 and GPT-5.2-Codex now run ~40% faster. Model and model weights are unchanged.

Jan 15

Announced Open Responses: an open-source spec for building multi-provider, interoperable LLM interfaces built on top of the original OpenAI Responses API.

Jan 14

Released gpt-5.2-codex to the Responses API. GPT-5.2-Codex is a version of GPT-5.2 optimized for agentic coding tasks in Codex or similar environments. Read more here.

Jan 13

Added dedicated SIP IP ranges for Realtime API. sip.api.openai.com does GeoIP routing, and will direct SIP traffic to the closest region. Learn more.

Jan 13

Updated the gpt-realtime-mini and gpt-audio-mini slugs to point to the 2025-12-15 snapshots. If you need the previous model snapshots, use gpt-realtime-mini-2025-10-06 and gpt-audio-mini-2025-10-06.

Jan 13

Updated the sora-2 slug to point to sora-2-2025-12-08. If you need the previous model snapshot, use sora-2-2025-10-06.

Jan 13

Updated the gpt-4o-mini-tts and gpt-4o-mini-transcribe slugs to point to the 2025-12-15 snapshots. If you need the previous model snapshots, use gpt-4o-mini-tts-2025-03-20 and gpt-4o-mini-transcribe-2025-03-20. We currently recomend using gpt-4o-mini-transcribe over gpt-4o-transcribe for the best results.

Jan 9

Fixed an issue where gpt-image-1.5 and chatgpt-image-latest were incorrectly using high fidelity for image edits through /v1/images/edits, even when fidelity was explicitly set to low (the default).

Dec 19

Added gpt-image-1.5 and chatgpt-image-latest to the Responses API image generation tool.

Dec 15

Dec 11

Dec 11

Released client-side compaction. For long-running conversations with the Responses API, you can use the /responses/compact endpoint to shrink the context you send with each turn.

Dec 4

Released gpt-5.1-codex-max to the Responses API. GPT-5.1-Codex is our most intelligent coding model optimized for long-horizon, agentic coding tasks. Read more here.

Nov 20

Added support for DTMF key presses in the Realtime API. You can now receive DTMF events while using a Realtime sideband connection. See docs here for more information.

Nov 13

Nov 13

Released gpt-5.1-codex and gpt-5.1-codex-mini to the Responses API. GPT-5.1-Codex is a version of GPT-5.1 optimized for agentic coding tasks in Codex or similar environments. Read more here.

Nov 13

Released extended prompt cache retention. Extended prompt cache retention keeps cached prefixes active for longer, up to a maximum of 24 hours. Extended Prompt Caching works by offloading the key/value tensors to GPU-local storage when memory is full, significantly increasing the storage capacity available for caching.

Oct 29

gpt-oss-safeguard-120b and gpt-oss-safeguard-20b are safety reasoning models built-upon gpt-oss. Read more here.

Oct 24

Released Enterprise Key Management (EKM). Enterprise Key Management (EKM) allows you to encrypt your customer content at OpenAI using keys managed by your own external Key Management System (KMS).

Oct 24

Feature

Oct 1

Released IP allowlist. IP allowlisting restricts API access to only the IP addresses or ranges you specify.

Sep 26

Added support for image and file as a tool call output in Responses API.

Sep 23

Launched special-purpose model gpt-5-codex, built and optimized for use with the Codex CLI.

Aug 21

Added support for connectors to the Responses API. Connectors are OpenAI-maintained MCP wrappers for popular services like Google apps, Dropbox, and more that can be used to give model read access to data stored in those services.

Aug 20

Released the Conversations API, which allows you to create and manage long-running conversations with the Responses API. See the migration guide to see a side-by-side comparison and learn how to migrate from an Assistants API integration to Responses and Conversations.

Aug 7

Jun 27

Launched support for Priority processing. Priority processing delivers significantly lower and more consistent latency compared to Standard processing while keeping pay-as-you-go flexibility.

Jun 13

New reusable prompts are now available in the dashboard and Responses API. Via API, you can now reference templates created in the dashboard via the prompt parameter (with a prompt id, optional version) and supply dynamic variables that can include strings, images, or file inputs. Reusable prompts are not available in Chat Completions. Learn more.

Jun 10

Released o3-pro, a version of the o3 reasoning model that uses more compute to answer hard problems with better reasoning and consistency. Prices for the o3 model have also been reduced for all API requests, including batch and flex processing.

Jun 4

Added fine-tuning support with direct preference optimization for the models gpt-4.1-2025-04-14, gpt-4.1-mini-2025-04-14, and gpt-4.1-nano-2025-04-14.

Jun 3

Feature

v1/chat/completions

v1/realtime

May 20

Added support for using strict mode for tool schemas when using parallel tool calling with non-fine-tuned models. Added new schema features, including string validation for email and other patterns and specifying ranges for numbers and arrays.

May 15

Apr 30

Feature

Apr 23

Apr 16

Apr 14

Added gpt-4.1, gpt-4.1-mini, and gpt-4.1-nano models to the API. These new models feature improved instruction following, coding, and a larger context window (up to 1M tokens). gpt-4.1 and gpt-4.1-mini are available for supervised fine-tuning. Announced deprecation of gpt-4.5-preview.

Mar 20

Added gpt-4o-mini-tts, gpt-4o-transcribe, gpt-4o-mini-transcribe, and whisper-1 models to the Audio API.

Mar 19

Released o1-pro, a version of the o1 reasoning model that uses more compute to answer hard problems with better reasoning and consistency.

Mar 11

Mar 3

Added metadata field support to fine-tuning jobs.

Feb 27

Released a research preview of GPT-4.5—our largest and most capable chat model yet. GPT-4.5's high "EQ" and understanding of user intent make it better at creative tasks and agentic planning.

Feb 25

Launched the API Usage Dashboard Update. This update addresses requests for additional data filters, such as project selection, date picker, and fine-grained intervals. There’s also better support for viewing usage across different products and service tiers.

Feb 5

Introducing data residency in Europe. Read more here.

Jan 31

Launched o3-mini, a new small reasoning model that is optimized for science, math, and coding tasks.

Jan 21

Expanded access to o1 model. The o1 series of models are trained with reinforcement learning to perform complex reasoning.

Dec 18

Dec 4

Launched Usage API, enabling customers to programmatically query activities and spending across OpenAI APIs.

Nov 20

Nov 4

Released Predicted Outputs, which greatly reduces latency for model responses where much of the response is known ahead of time. This is most common when regenerating the content of documents and code files with only minor changes.

Oct 1

Sep 26

Released new omni-moderation-latest moderation model, which supports both images and text (for some categories), supports two new text-only harm categories, and has more accurate scores.

Sep 12

Released o1-preview and o1-mini, new large language models trained with reinforcement learning to perform complex reasoning tasks.

Aug 29

Feature

v1/assistants

Aug 1

Launched Admin and Audit Log APIs, allowing customers to programmatically administer their organization and monitor changes using the audit logs. Audit logging must be enabled within settings.

Jul 24

Launched self-serve SSO configuration, allowing Enterprise customers on custom and unlimited billing to set up authentication against their desired IDP.

Jul 18

Released GPT-4o mini, our affordable an intelligent small model for fast, lightweight tasks.

Jul 17

Released Uploads to upload large files in multiple parts.

Jun 3

Update

May 15

May 13

Released GPT-4o in the API. GPT-4o is our fastest and most affordable flagship model.

May 9

Update

May 7

Update

May 2

Added a new endpoint to delete a message from a thread in the Assistants API.

Apr 16

Introduced project based hierarchy for organizing work by projects, including the ability to create API keys and manage rate and cost limits on a per-project basis (cost limits available only for Enterprise customers).

Apr 15

Update

Mar 14

Added support for streaming in the Assistants API

Feb 9

Update

Feb 1

Update

Jan 25

Dec 15

Update

Nov 30

Update

Nov 6

Update