What shipped in the QuiverAI App and across the QuiverAI API Platform.https://quiver.ai/https://quiver.ai/changelog/#2026-09-16-api-platform-launchhttps://quiver.ai/changelog/#2026-09-16-api-platform-launch`POST /v1/responses` runs on Arrow's Open Responses contract. Declare function and custom tools, execute `function_call` items yourself, and point a stock Open Responses client at it unmodified. The endpoint is stateless: `previous_response_id` and `store: true` are rejected rather than silently ignored. Arrow 2 and Arrow 2 Telos are priced by measured token usage rather than fixed credits, reported as `billing.rates` on `GET /v1/models`. Sandbox keys reach the same routes as production keys but never reach a model. They return deterministic output marked `x-quiver-environment: test`, and inline markers let you force partial, failed and slow responses on demand. Every response carries rate-limit headers — limit, remaining, reset, scope, subject and dimension — so a client can back off before it is throttled. API key issuance and rotation are crash-recoverable. A failure mid-rotation can no longer strand an organization or leave a phantom live secret. Arrow 1, Arrow 1.1 and Arrow 1.1 Max remain available through the API.Wed, 16 Sep 2026 00:00:00 GMTAPI Platformapiplatformhttps://quiver.ai/changelog/#2026-09-16-app-launchhttps://quiver.ai/changelog/#2026-09-16-app-launchApp now starts from a conversation. Describe what you want, and App calls the right design model, streams the drawing as it is made, and keeps every result as a creation you can come back to. Every creation is real, editable SVG. Refine it with a follow-up prompt, or open it on the canvas and adjust it by hand: select and duplicate child elements, step back through undo history, zoom in and out, and fit the artwork to the view. Edits you save on the canvas flow back into the chat and the creation sidebar. Animation is on the canvas too. Animate a creation and replay it without leaving the page. Arrow 2 is the App's model. Arrow 1, Arrow 1.1 and Arrow 1.1 Max are retired from the App and remain available through the API. A weekly usage meter shows where you stand against your plan, and warns you before you run low.Wed, 16 Sep 2026 00:00:00 GMTAppappmodels