Cancel a pending or processing generation
Cancels a generation that has not yet completed. Returns the cancelled generation resource. On a generation already in cancelled state this is a no-op (idempotent). On a generation already in succeeded or failed this returns 400 invalid_request / generation_not_cancellable (terminal states cannot be undone). Hold-released or refund-applied credits are reflected on the next GET /v1/balance.
Authorizations
Your team API key (starts with al_live_).
Headers
Optional API version pin (YYYY-MM-DD). Defaults to your team's pinned version, or the system default 2026-07-16 for unauthenticated requests.
^\d{4}-\d{2}-\d{2}$"2026-07-16"
Path Parameters
Opaque generation ID to cancel (img_* or vid_*)
"img_01HXMQ7Z3K8Y2ABCDEFGHJKM"
Response
Cancelled generation resource
Discriminator — always inference. Mirrors OpenAI's object-field convention so SDK clients can branch on the resource type without inspecting the ID prefix. A single canonical value (inference) covers both image and video generations; use media_type to distinguish the rendering kind.
inference "inference"
Opaque generation ID
"img_01HXMQ7Z3K8Y2VNABCDEFGHJKM"
Current generation status. Lifecycle: pending (created, awaiting dispatch) → processing (running) → one of the terminal values succeeded / failed / cancelled. Additional terminal values may be introduced in future API versions and will be announced via the changelog before they appear on the wire.
pending, processing, succeeded, failed, cancelled "succeeded"
The text prompt used for generation
"A golden sunset over mountains, cinematic lighting"
Creation timestamp (ISO 8601)
"2026-05-04T10:00:00Z"
Distinguishes image vs video generation. May be null for older rows minted before this column existed.
image, video "image"
Generated image proxy URLs. Each URL is anonymous-read (no auth header required) and edge-cached for 24 hours. Available for ~24 hours after generation. Save what you want to keep — long-term storage is intentionally not part of the platform. URLs return 410 Gone after expiry.
Generated video proxy URL (only present on media_type: video). Same 24h TTL as image output_urls.
"https://api.aurous-labs.com/v1/videos/vid_01HXMQ7Z3K8Y2VNABCDEFGHJKM/output?token=..."
The reference image URLs you supplied as visual anchors for this generation, echoed back (snapshotted at inference time). Present only when the generation was driven by your own reference images (reference_image_urls or reference subjects). Omitted entirely for character-driven generations — a character's reference images are managed platform assets and are never echoed.
Human-readable error message if the generation failed. Non-contractual prose — do not parse or match on this value. Switch on error_code instead.
"Content policy violation"
Machine-readable failure reason when status is failed. Switch on this, not on error_message (which is human-readable and may change). Null on failures recorded before this field existed and on failure paths not yet classified — always keep a default branch in your switch statement.
generation_interrupted, reference_preparation_failed, content_filtered, generation_failed null
Processing duration in milliseconds (set on terminal status)
14820
Per-generation cost breakdown — same shape as the estimated_cost returned by POST /v1/{images,videos}/estimate. May be null for older rows from before this field existed; populated for all new generations. The amount reflects the committed charge for terminal-status rows — 0 (with refunded: true) on a failed generation, since the reserved hold was released, never charged.
Resolved output image width in pixels (image generations only). Reflects the post-snap dimension actually generated; may differ from a custom-requested width by up to 31 px due to multiple-of-32 snapping.
2048
Resolved output image height in pixels (image generations only). Reflects the post-snap dimension actually generated; may differ from a custom-requested height by up to 31 px due to multiple-of-32 snapping.
2048
Number of images in the batch. Reflects the requested count while the generation is running; on a terminal status it reflects the number actually DELIVERED — when part of a batch fails you receive the successful images, this count re-stamps to match, and the difference is refunded automatically.
1
Named size preset applied to this generation. null when the request used custom width/height instead of a preset.
2k_1_1, 2k_3_2, 2k_2_3, 2k_4_3, 2k_3_4, 2k_16_9, 2k_9_16, 2k_21_9, 4k_1_1, 4k_3_2, 4k_2_3, 4k_4_3, 4k_3_4, 4k_16_9, 4k_9_16, 4k_21_9 "2k_1_1"
Inference mode dispatched. Images: t2i (text-to-image) — reference images and characters are supplementary inputs to the t2i flow, not a separate mode. Videos (this list also returns vid_* rows): t2v (text-to-video), i2v (image-to-video — frame-driven, subject-driven, or a pinned Action/template video), or r2v (reference-to-video — you supplied your own reference video via reference_video_url). i2i is reserved for a future image-edit endpoint and is not currently emitted.
t2i, t2v, i2v, r2v, i2i "t2i"
CFG rescale factor the customer supplied on the request body, echoed back here. Range 0.0-1.0. Omitted when the customer did not supply a per-request value (the platform applied a precedence-chain default — LoRA, character override, or the global 0.7 — which is not exposed on the response).
0 <= x <= 10.7
Denoising strength the customer supplied on the request body, echoed back here. Range 0.0-1.0. Omitted when the customer did not supply a value or when the generation was a bare text-to-image request (denoise is only applied when reference images or a character are attached).
0 <= x <= 10.6
The random seed the model actually used for this image generation. Populated even when you omit seed on the request — the platform requests a random seed and records the concrete value the provider rolled, so you can reproduce the result by passing it back as seed. Available once status is succeeded; null before then and for failed/cancelled generations. For multi-image batches (image_count > 1) this is the seed of the first image (output_urls[0]); per-image seeds are not yet exposed. Image generations only.
819572108
Video duration in seconds (video generations only)
5
Video resolution (video generations only)
480p, 720p, 1080p "480p"
Video aspect ratio (video generations only)
16:9, 4:3, 1:1, 3:4, 9:16, 21:9, adaptive "16:9"
Whether the generated video includes synchronized audio (video generations only). Echoes the request generate_audio (default true).
true
Resolved reference-video task (video generations only). reference: the generation borrows the clip's motion for a new scene. extend: the generation continues the clip itself. null on every generation that did not supply reference_video_url (including all pre-existing rows). Additional task types may be introduced in future API versions — treat an unrecognized value as opaque.
reference, extend "reference"
Resolved extend direction (video generations only). Non-null only when video_task is extend; null otherwise (including every reference-mode and non-reference generation).
forward, backward "forward"
The reference video URL you submitted, echoed back VERBATIM as you sent it — never re-signed, never a storage path. null for generations that did not supply reference_video_url (including every dashboard-originated row).
"https://cdn.example.com/clips/dance-loop.mp4"
The reference audio URL you submitted, echoed back VERBATIM as you sent it. null for generations that did not supply reference_audio_url.
"https://cdn.example.com/audio/voiceover.mp3"
The video model (an id or slug from GET /v1/video_loras) behind this generation (video generations only) — either the video_lora_id you pinned on the request, or the model the platform auto-matched to your prompt when none was pinned. null for a plain (no video model) generation, and always null on image generations.
"lora_01HXMQ7Z3K8Y2ABCDEFGHJKM"
Display name of the video model in video_lora_id, if any. Omitted for plain generations (no pinned or matched video model).
"Cinematic Pan"
Character ID supplied on the request (char_<ulid> or legacy UUID), echoed back. null when no character was attached to this generation.
"char_01HXMQ7Z3K8Y2VNABCDEFGHJKM"
Ordered subjects composed into this generation (positional — entry N echoes entry N of the identity inputs sent on create; legacy character_id / reference_image_urls inputs are normalized into the same projection). Character entries carry the opaque char_<ulid>; reference entries echo only their image count, never URLs. Video generations echo their cast the same way (up to 2 entries), matching the subjects[] array accepted by POST /v1/videos. Character entries on generations created before cast snapshotting may carry character_id: null; the id is never substituted with an internal identifier. null for generations that did not compose subjects (plain prompt-only or style generations, and context-image generations). The engine is not exposed.
Count-only echo of the context_images[] sent on create — the number of loose reference images supplied, never the image URLs themselves. null for every generation that did not use context_images (plain prompt-only, style, subject, and video generations).
The composition act applied to this generation, echoed as { id, name }. An act is applied either because you pinned it with action_id or because act detection matched one automatically. id is the act identifier from GET /v1/actions; name is its display name (or null when the name was not recorded). null for every generation that did not apply an act — plain prompt-only, style, context-image, and video generations. A new, always-present, nullable key: existing integrations that do not read it are unaffected.
The prompt style applied to this generation, echoed as { id, name }. A style is applied either because you pinned it with lora_id or because style matching resolved one from your prompt — the echo always reflects the style that actually ran (a retired id that aliases to a successor echoes the successor). id is the lora_* identifier from GET /v1/loras and round-trips into lora_id. null for every generation without a style — including lora_id: null requests, retired styles that generate plain, video generations, and all rows minted before styles shipped. A new, always-present, nullable key: existing integrations that do not read it are unaffected.
Non-fatal request adjustments, present ONLY on the POST /v1/images 201 body (and the estimate response) — never on GET reads, list rows, or webhook payloads. Omitted entirely when empty. Current codes: parameter_ignored, style_retired_plain; new codes may be added without a version bump — ignore unknown codes. Idempotent replays return the original warnings verbatim.
Outcome of the prompt-optimization step, echoed for observability. Current values: no_request (the request did not invoke it), succeeded, identical, refused, transport_error, length_overflow; null on rows minted before this field existed. INFORMATIONAL and deliberately an OPEN set (no schema enum — codegen clients must not mint a closed union): do not branch control flow on it; new values may be added without a version bump.
"succeeded"
LoRAs applied to this generation. null for prompt-only and pure-reference generations.
API contract version applied at the time this row was minted (D25 — frozen for replay across future version bumps).
"2026-07-16"
Aurous-Request-Id of the POST that created this row. Quote in support tickets to trace the original create request.
"req_01HXMQ7Z3K8Y2VNABCDEFGHJKM"
Terminal-status timestamp (ISO 8601). NULL until the generation reaches a terminal state.
"2026-05-04T10:00:14Z"

