What's new in OpenAI API
The OpenAI API changelog, summarized: 15 changes from the last 90 days (15 new), taken from the official OpenAI API changelog. Latest: Eligible ChatGPT Pro and Business subscribers can now claim up to $500 per month in free API credits as a… on Oct 28, 2026. Updated 2026-10-29 18:50 UTC.
All recent OpenAI API changes
Wednesday
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OpenAI APINew
Eligible ChatGPT Pro and Business subscribers can now claim up to $500 per month in free API credits as a…
Eligible ChatGPT Pro and Business subscribers can now claim up to $500 per month in free API credits as a subscription benefit. Activate the benefit from ChatGPT or API Platform by linking an API organization you own.
platform.openai.com (official source, opens in a new tab)
Monday
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OpenAI APINew
Released GPT-6.1 Terra, a fast, efficient model for visual reasoning, precise computer use, and clear,…
Released GPT-6.1 Terra, a fast, efficient model for visual reasoning, precise computer use, and clear, natural writing. See the GPT-6 guide for prompting and migration guidance.
platform.openai.com (official source, opens in a new tab)
Thursday
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OpenAI APINew
The Decisions API is now generally available with gpt-6-luna.
Cache shared input across requests for prompt-cache discounts, include images in individual question instructions, and pass structured data directly with input_json.
platform.openai.com (official source, opens in a new tab)
Wednesday
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OpenAI APINew
You can now choose which service tiers projects can use in Platform settings.
Organization settings can restrict service tiers for all projects. See service tier errors.
platform.openai.com (official source, opens in a new tab)
Tuesday
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OpenAI APINew
You can now choose 12-hour prompt caching in the API.
12-hour prompt caching keeps shared instructions, tools, and context cached longer to benefit from lower cached-input pricing, even when requests are hours apart. 12-hour cache writes cost 2.5x the input token price. Read more here.
platform.openai.com (official source, opens in a new tab)
Friday
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OpenAI APINew
Released prompt-to-voice for all API customers. Create a custom voice from a text description through the API…
Released prompt-to-voice for all API customers. Create a custom voice from a text description through the API or voice Playground, then reuse it in GPT-Live sessions.
platform.openai.com (official source, opens in a new tab) -
OpenAI APINew
OpenAI-hosted sandboxes in the Agents API now include the Artifact SDK and skills for creating and editing…
OpenAI-hosted sandboxes in the Agents API now include the Artifact SDK and skills for creating and editing spreadsheets, presentations, and Word documents. Added Ultrafast mode to the Agents API.
platform.openai.com (official source, opens in a new tab)
Thursday
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OpenAI APINew
Added native Decisions integration in GPT-Live. Your app can act while your user is speaking or react to what…
Added native Decisions integration in GPT-Live. Your app can act while your user is speaking or react to what Live says.
platform.openai.com (official source, opens in a new tab)
Friday
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OpenAI APINew
You can now pre-warm an OpenAI-hosted sandbox before attaching it to an Agents API session.
Prewarming improves latency by creating and configuring the sandbox before a user finishes sending their message. This means the user doesn't have to wait for all this work to complete.
platform.openai.com (official source, opens in a new tab)
Thursday
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OpenAI APINew
Added Ultrafast mode for GPT-6.1 Sol in the Responses API.
Use gpt-6.1-sol with service_tier: "ultrafast" to reduce the time between generated output tokens. It is available to all API users, subject to rate limits, with global processing and US and EU data residency. See Ultrafast pricing.
platform.openai.com (official source, opens in a new tab)
Wednesday
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OpenAI APINew
Updated the chat-latest snapshot, which points to the latest model available in ChatGPT for Plus, Pro,…
Updated the chat-latest snapshot, which points to the latest model available in ChatGPT for Plus, Pro, Business and Enterprise users.
platform.openai.com (official source, opens in a new tab)
Tuesday
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OpenAI APINew
Released the Decisions API in beta with gpt-6-luna.
Turn text and images into typed answers 10x faster than the Responses API.
platform.openai.com (official source, opens in a new tab) -
OpenAI APINew
Simplified API usage tiers from five to three: Build, Launch, and Grow.
Organizations automatically upgrade as total credit purchases reach tier minimums. See usage tiers for monthly usage limits and how to view rate limits for each model.
platform.openai.com (official source, opens in a new tab)
Monday
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OpenAI APINew
Added an in-product flow for HIPAA compliance support in API Organization settings > General.
Admins of eligible organizations can now accept the standard Business Associate Agreement (BAA) and enable HIPAA compliance support for their organization.
platform.openai.com (official source, opens in a new tab)
Tuesday
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OpenAI APINew
Added computer use to the Agents API. Agents can complete tasks in an OpenAI-hosted browser, with website…
Added computer use to the Agents API. Agents can complete tasks in an OpenAI-hosted browser, with website access approvals and sign-in handled by your application.
platform.openai.com (official source, opens in a new tab)
Summaries are short excerpts of the vendor's own text; the link on each entry goes to the official source. Tags are automatic (keyword rules) and can be wrong. OpenAI API is a trademark of its owner; Relay is not affiliated with it.