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Cloud Changelog
OpenAI API changelog 2025
45 announcements, 2025
All OpenAI API changes · 143 announcements since January 2025 · 11 GA · 4 previews · 6 price changes · 6 deprecations
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December 20256
gpt-image-1.5 and chatgpt-image-latest added to Responses API image tool
gpt-image-1.5 and chatgpt-image-latest image generation models released
Four dated audio snapshots released, with custom voices for eligible customers
GPT-5.2 released, with xhigh reasoning effort and compaction-based context management
Responses API adds /responses/compact endpoint for client-side compaction
gpt-5.1-codex-max released in the Responses API for long-horizon coding
November 20255
Realtime API supports DTMF key press events on sideband connections
Extended prompt cache retention released, keeping cached prefixes up to 24 hours
Role-based access controls (RBAC) released for API and Dashboard
GPT-5.1 released, with a new none reasoning default for faster responses
gpt-5.1-codex and gpt-5.1-codex-mini released in the Responses API
October 20255
gpt-oss-safeguard-120b and gpt-oss-safeguard-20b safety reasoning models released
Enterprise Key Management (EKM) released for encrypting content with your own KMS keys
GPT-5 Pro and Sora 2 video generation (v1/videos) released at DevDay
IP allowlist released to restrict API access to specified IP addresses
September 20252
August 20254
June 20256
Priority processing launched, with lower and more consistent latency
o3-deep-research and o4-mini-deep-research released, plus webhooks and cheaper web search
Reusable prompts available in the dashboard and Responses API
Fine-tuning with direct preference optimization for GPT-4.1, mini and nano
New gpt-4o-audio-preview and gpt-4o-realtime-preview snapshots; Agents SDK for TypeScript