mTLS and X.509 workload identity federation GA
Mutual TLS (mTLS) and X.509 workload identity federation generally available for OpenAI API.
OpenAI changelog: August 2026
21 releases from to
Everything OpenAI shipped in August 2026, collected from official OpenAI sources. Each entry is dated and links to the page it came from.
August 2026 at a glance
August 2026 was OpenAI's busiest month of the 12 months to then: 21 releases, about 2× its monthly average of 11. That was 10 releases more than July 2026. Most were Developer Tools (9), followed by API (4) and Enterprise & Security (3).
Releases
21
+10 vs July 2026
Rank of 12 months
1st
Average 10.5 a month
Most shipped
Developer Tools
9 releases
Notable OpenAI launches in August 2026
- Product
Model Deprecation Announcement
Deprecation of whisper-1, gpt-4o-transcribe, gpt-4o-mini-transcribe, and gpt-4o-transcribe-diarize. These models will shut down on February 26, 2027. Migrate to gpt-live-transcribe or gpt-transcribe.
Source: OpenAI API Changelog - Product
Deprecation of whisper-1 and Assistants API
Announced the deprecation of whisper-1, gpt-4o-transcribe, gpt-4o-mini-transcribe, and gpt-4o-transcribe-diarize. These models will shut down on February 26, 2027. Migrate to gpt-live-transcribe or gpt-transcribe. See the transcription guide and deprecations page. The Assistants…
Source: OpenAI API Changelog - Product
chat-latest snapshot update
Updated the chat-latest snapshot, which points to the latest model available in ChatGPT for Plus and Pro users. We recommend leveraging GPT-5.6 Sol for production API usage, but feel free to use this model to test the latest improvements for chat use cases. The underlying model…
Source: OpenAI API Changelog
All OpenAI releases in August 2026
Newest first. Each entry links to the official page it came from.
August 202621 releases
Model Deprecation Announcement
Deprecation of whisper-1, gpt-4o-transcribe, gpt-4o-mini-transcribe, and gpt-4o-transcribe-diarize. These models will shut down on February 26, 2027. Migrate to gpt-live-transcribe or gpt-transcribe.
Deprecation of whisper-1 and Assistants API
Announced the deprecation of whisper-1, gpt-4o-transcribe, gpt-4o-mini-transcribe, and gpt-4o-transcribe-diarize. These models will shut down on February 26, 2027. Migrate to gpt-live-transcribe or gpt-transcribe. See the transcription guide and deprecations page. The Assistants…
Deprecated audio transcription models
Shut down whisper-1, gpt-4o-transcribe, gpt-4o-mini-transcribe, and gpt-4o-transcribe-diarize with migration to gpt-live-transcribe
Assistants API shutdown
Migrate to Responses API and Conversations API with migration guide
Trigger scheduled tasks from Gmail, Slack, and GitHub events
Enabled ChatGPT scheduled tasks to trigger from Gmail, Slack, and GitHub events with filtering capabilities.
Browser extensions, site tools, and cloud sign-in
Added browser extension support for Microsoft Edge, Brave, Opera, and Vivaldi; introduced site tools and cloud sign-in features.
Regional processing for individual requests
API customers can select regional processing for individual requests using a prefixed domain with an API key from a Global geography project.
GPT-5.6 Sol price cut
GPT-5.6 Sol now costs $4 per million input tokens and $20 per million output tokens, 20% lower input and 33% lower output pricing. The promotional pricing is available at least through November 21, 2026.
Transparent backgrounds for gpt-image-2 (preview)
Transparent backgrounds available in preview for gpt-image-2 and gpt-image-2-2026-04-21 in Images API and Responses API.
Prompt Caching Dashboard Launch
Prompt Caching dashboard released for tracking cache efficiency metrics.
Apple Messages plugin, Site co-editing and shared thread snapshots
Introduced Apple Messages plugin, site co-editing, computer history availability, shared thread snapshots, and unified pinned threads.
GitLab support in Codex cloud (Beta)
Added GitLab support in Codex cloud (Beta) for project connections, environment creation, and merge request reviews.
Ultrafast mode for GPT-5.6 Sol (limited preview)
Announced Ultrafast mode, a new API service tier for GPT-5.6 Sol that runs up to 14x faster than Standard processing. Available in limited preview to select customers.
Computer History
Computer History is an opt-in feature in the ChatGPT desktop app on macOS that turns activity across apps and websites into memories and a timeline that ChatGPT and Codex can use. Choose which apps and websites contribute, pause collection, and review or delete your history at a…
ChatGPT desktop app for Linux (preview) and agent imports
The ChatGPT desktop app for Linux is available in preview for supported Ubuntu, Debian, and Fedora desktop distributions on x64 and ARM64 processors. Import setup and recent work from other agents like Claude Code, Claude Cowork, and Cursor.
Feature Daybreak models
Daybreak now offers two access tiers for approved defenders: Daybreak Blue and Daybreak Red. Use them to move from security findings to validated fixes in explicitly authorized engagements. Start with Daybreak Blue for most defensive security work. It provides access to general-…
Daybreak Blue and Daybreak Red access tiers
Daybreak Blue and Daybreak Red access tiers launched for approved defenders with different model capabilities.
chat-latest snapshot update
Updated the chat-latest snapshot, which points to the latest model available in ChatGPT for Plus and Pro users. We recommend leveraging GPT-5.6 Sol for production API usage, but feel free to use this model to test the latest improvements for chat use cases. The underlying model…
Fast mode supports long-context requests
Fast mode supports long-context requests for GPT-5.6 Sol, GPT-5.6 Terra, and GPT-5.6 Luna with 2.5× faster speeds than Standard tier.
API key filtering in dashboards
Customers can now filter and group data by API key in the Usage and Costs dashboards. The Usage API and Costs API also support the API key dimension for programmatic reporting and analysis.
Where August 2026 sits
OpenAI releases per month, for August 2026 and the 11 months before it. A taller bar means more releases that month; the dated entries for each month are on its own page.
Other companies in August 2026
20 of the companies we track shipped in August 2026; OpenAI ranks 2nd by number of releases.
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