--- title: "Text to video" method: POST path: "/v1/text_to_video" tags: ["Start generating"] --- # Text to video `POST /v1/text_to_video` This endpoint will start a new task to generate a video from a text prompt. ## Headers - `X-Runway-Version` '2024-11-06', required ## Request body - union - object - `promptText` string, required — A non-empty string up to 1000 characters (measured in UTF-16 code units). This should describe in detail what should appear in the output. - `ratio` '1280:720' | '720:1280', required — The resolution of the output video. - `duration` integer, required — The number of seconds of duration for the output video. Must be an integer from 2 to 10. - `seed` integer — If unspecified, a random number is chosen. Varying the seed integer is a way to get different results for the same other request parameters. Using the same seed integer for an identical request will produce similar results. - `contentModeration` object — Settings that affect the behavior of the content moderation system. - `publicFigureThreshold` 'auto' | 'low' — When set to `low`, the content moderation system will be less strict about preventing generations that include recognizable public figures. - `outputFormat` 'mp4' | 'prores' | 'png_sequence' | 'hdr10' | 'hlg' | 'sdr_rec709_10bit' | 'hdr_pq_12bit_master' | 'hdr_prores' | 'hdr_png_sequence' | 'hdr_exr_sequence' — The container/encoding of the output. `mp4` (default) returns an H.264 .mp4. `prores` returns a ProRes .mov. `png_sequence` returns a .zip of PNG frames (plus a separate .wav artifact when the output has audio). `hdr10` (HEVC Main 10, BT.2020 + PQ) and `hlg` (HEVC Main 10, BT.2020 + HLG) return true-HDR 10-bit .mp4s; `sdr_rec709_10bit` returns a 10-bit Rec.709 HEVC .mp4 for SDR grading pipelines; `hdr_pq_12bit_master` returns a 12-bit 4:4:4 BT.2020 + PQ HEVC .mov with measured HDR10 content-light metadata for mastering; `hdr_prores` returns a BT.2020 + PQ ProRes .mov editorial mezzanine, whose tier is selectable with `proresProfile` (`422`, `422 HQ`, or `4444`; defaults to `422 HQ`); `hdr_png_sequence` returns a .zip of 16-bit PNG frames carrying the PQ signal losslessly (plus a colorimetry.json sidecar and a separate .wav when the output has audio); `hdr_exr_sequence` returns a .zip of half-float OpenEXR frames carrying the HDR signal as linear BT.2020 display light, 1.0 = 100 nits (plus a colorimetry.json sidecar and a separate .wav when the output has audio). Non-mp4 formats incur an additional per-second credit surcharge: 5 credits per second for `prores` and `png_sequence`, and 20 credits per second for every 10-bit and deeper profile (including the 12-bit, 16-bit, and EXR ones), rising to 40 credits per second when the output is larger than 4 megapixels (roughly 4K). - `proresProfile` '422' | '4444' | '422 Proxy' | '422 LT' | '422 HQ' | '4444 XQ' — The ProRes profile to use. Only valid when `outputFormat` is `prores` or `hdr_prores`. For `prores`, any profile is accepted and the default is `4444`. For `hdr_prores`, only `422`, `422 HQ` and `4444` are available and the default is `422 HQ` — `422 Proxy` and `422 LT` quantize too heavily to hold the HDR gradients, and 12-bit output is served by `hdr_pq_12bit_master` instead of `4444 XQ`. - `model` 'gen4.5', required - object - `promptText` string, required — A non-empty string up to 1000 characters (measured in UTF-16 code units). This should describe in detail what should appear in the output. - `ratio` '1280:720' | '720:1280' | '1080:1920' | '1920:1080', required — The resolution of the output video. - `audio` boolean — Whether to generate audio for the video. Audio inclusion affects pricing. - `negativePrompt` string — Text describing what should not appear in the output video. - `duration` 4 | 6 | 8 — The number of seconds of duration for the output video. - `model` 'veo3.1', required - object - `promptText` string, required — A non-empty string up to 1000 characters (measured in UTF-16 code units). This should describe in detail what should appear in the output. - `ratio` '1280:720' | '720:1280' | '1080:1920' | '1920:1080', required — The resolution of the output video. - `audio` boolean — Whether to generate audio for the video. Audio inclusion affects pricing. - `negativePrompt` string — Text describing what should not appear in the output video. - `duration` 4 | 6 | 8 — The number of seconds of duration for the output video. - `model` 'veo3.1_fast', required - object - `promptText` string, required — A non-empty text prompt describing what should appear in the output. - `resolution` '2K' | '768P' — The output resolution. MiniMax H3 supports 768P and 2K. - `duration` integer — The number of seconds of duration for the output video. - `ratio` 'adaptive' | '21:9' | '16:9' | '4:3' | '1:1' | '3:4' | '9:16' — The aspect ratio of the output video. Use adaptive only when image or video references are provided; text-only requests require a concrete ratio. - `references` object[] — An optional array of image references (up to 9). See [our docs](/assets/inputs#images) on image inputs for more information. - `uri` union, required — A HTTPS URL, Runway or data URI containing an encoded image. See [our docs](/assets/inputs#images) on image inputs for more information. - string — A HTTPS URL, Runway upload URI, or base64 data URI (e.g. `data:image/png;base64,...`, up to 5MB) containing an encoded image. See [our docs](/assets/inputs#images) on image inputs for more information. - string — A Runway upload URI. See https://docs.dev.runwayml.com/assets/uploads for more information. - string — A data URI containing encoded media. - `referenceVideos` object[] — An optional array of video references. The combined duration across all video references must not exceed 15 seconds. See [our docs](/assets/inputs#videos) on video inputs for more information. - `type` 'video', required - `uri` union, required — A HTTPS URL, Runway or data URI containing an encoded video. See [our docs](/assets/inputs#videos) on video inputs for more information. - string — A HTTPS URL, Runway upload URI, or base64 data URI (e.g. `data:video/mp4;base64,...`, up to 16MB) containing an encoded video. See [our docs](/assets/inputs#videos) on video inputs for more information. - string — A Runway upload URI. See https://docs.dev.runwayml.com/assets/uploads for more information. - string — A data URI containing encoded media. - `referenceAudio` object[] — An optional array of audio references. Audio references require a text prompt, and the total combined duration must not exceed 15 seconds. - `type` 'audio', required - `uri` union, required — A HTTPS URL, Runway or data URI containing an encoded audio. See [our docs](/assets/inputs#audio) on audio inputs for more information. - string — A HTTPS URL, Runway upload URI, or base64 data URI (e.g. `data:audio/mp3;base64,...`, up to 16MB) containing an encoded audio. See [our docs](/assets/inputs#audio) on audio inputs for more information. - string — A Runway upload URI. See https://docs.dev.runwayml.com/assets/uploads for more information. - string — A data URI containing encoded media. - `model` 'hailuo3', required - object - `promptText` string, required — A non-empty string up to 2500 characters (measured in UTF-16 code units). This should describe in detail what should appear in the output. - `duration` integer — The number of seconds of duration for the output video. - `ratio` '1280:720' | '720:1280' | '960:960' | '1108:832' | '832:1108' | '1920:1080' | '1080:1920' | '1440:1440' | '1662:1248' | '1248:1662' — The resolution of the output video. - `model` 'happyhorse_1_0', required - object - `promptText` string, required — A non-empty text prompt up to 3500 characters describing what should appear in the output. - `audio` boolean — Whether to generate audio for the video. - `duration` integer — The number of seconds of duration for the output video. - `ratio` '992:432' | '864:496' | '752:560' | '640:640' | '560:752' | '496:864' | '1470:630' | '1280:720' | '1112:834' | '960:960' | '834:1112' | '720:1280' | '2206:946' | '1920:1080' | '1664:1248' | '1440:1440' | '1248:1664' | '1080:1920' | '3840:1646' | '3840:2160' | '3840:2880' | '3840:3840' | '2880:3840' | '2160:3840' — The resolution of the output video. - `references` object[] — An optional array of image references (up to 9). See [our docs](/assets/inputs#images) on image inputs for more information. - `uri` union, required — A HTTPS URL, Runway or data URI containing an encoded image. See [our docs](/assets/inputs#images) on image inputs for more information. - string — A HTTPS URL, Runway upload URI, or base64 data URI (e.g. `data:image/png;base64,...`, up to 5MB) containing an encoded image. See [our docs](/assets/inputs#images) on image inputs for more information. - string — A Runway upload URI. See https://docs.dev.runwayml.com/assets/uploads for more information. - string — A data URI containing encoded media. - `referenceVideos` object[] — An optional array of video references. The combined duration across all video references must not exceed 15 seconds. See [our docs](/assets/inputs#videos) on video inputs for more information. - `type` 'video', required - `uri` union, required — A HTTPS URL, Runway or data URI containing an encoded video. See [our docs](/assets/inputs#videos) on video inputs for more information. - string — A HTTPS URL, Runway upload URI, or base64 data URI (e.g. `data:video/mp4;base64,...`, up to 16MB) containing an encoded video. See [our docs](/assets/inputs#videos) on video inputs for more information. - string — A Runway upload URI. See https://docs.dev.runwayml.com/assets/uploads for more information. - string — A data URI containing encoded media. - `referenceAudio` object[] — An optional array of audio references. The total combined duration must not exceed 15 seconds. - `type` 'audio', required - `uri` union, required — A HTTPS URL, Runway or data URI containing an encoded audio. See [our docs](/assets/inputs#audio) on audio inputs for more information. - string — A HTTPS URL, Runway upload URI, or base64 data URI (e.g. `data:audio/mp3;base64,...`, up to 16MB) containing an encoded audio. See [our docs](/assets/inputs#audio) on audio inputs for more information. - string — A Runway upload URI. See https://docs.dev.runwayml.com/assets/uploads for more information. - string — A data URI containing encoded media. - `model` 'seedance2', required - object - `promptText` string, required — A non-empty text prompt up to 3500 characters describing what should appear in the output. - `audio` boolean — Whether to generate audio for the video. - `duration` integer — The number of seconds of duration for the output video. - `ratio` '992:432' | '864:496' | '752:560' | '640:640' | '560:752' | '496:864' | '1470:630' | '1280:720' | '1112:834' | '960:960' | '834:1112' | '720:1280' — The resolution of the output video. Seedance 2.0 Fast supports 480p and 720p only. - `references` object[] — An optional array of image references (up to 9). See [our docs](/assets/inputs#images) on image inputs for more information. - `uri` union, required — A HTTPS URL, Runway or data URI containing an encoded image. See [our docs](/assets/inputs#images) on image inputs for more information. - string — A HTTPS URL, Runway upload URI, or base64 data URI (e.g. `data:image/png;base64,...`, up to 5MB) containing an encoded image. See [our docs](/assets/inputs#images) on image inputs for more information. - string — A Runway upload URI. See https://docs.dev.runwayml.com/assets/uploads for more information. - string — A data URI containing encoded media. - `referenceVideos` object[] — An optional array of video references. The combined duration across all video references must not exceed 15 seconds. See [our docs](/assets/inputs#videos) on video inputs for more information. - `type` 'video', required - `uri` union, required — A HTTPS URL, Runway or data URI containing an encoded video. See [our docs](/assets/inputs#videos) on video inputs for more information. - string — A HTTPS URL, Runway upload URI, or base64 data URI (e.g. `data:video/mp4;base64,...`, up to 16MB) containing an encoded video. See [our docs](/assets/inputs#videos) on video inputs for more information. - string — A Runway upload URI. See https://docs.dev.runwayml.com/assets/uploads for more information. - string — A data URI containing encoded media. - `referenceAudio` object[] — An optional array of audio references. The total combined duration must not exceed 15 seconds. - `type` 'audio', required - `uri` union, required — A HTTPS URL, Runway or data URI containing an encoded audio. See [our docs](/assets/inputs#audio) on audio inputs for more information. - string — A HTTPS URL, Runway upload URI, or base64 data URI (e.g. `data:audio/mp3;base64,...`, up to 16MB) containing an encoded audio. See [our docs](/assets/inputs#audio) on audio inputs for more information. - string — A Runway upload URI. See https://docs.dev.runwayml.com/assets/uploads for more information. - string — A data URI containing encoded media. - `model` 'seedance2_fast', required - object - `promptText` string, required — A non-empty text prompt up to 3500 characters describing what should appear in the output. - `audio` boolean — Whether to generate audio for the video. - `duration` integer — The number of seconds of duration for the output video. - `ratio` '992:432' | '864:496' | '752:560' | '640:640' | '560:752' | '496:864' | '1470:630' | '1280:720' | '1112:834' | '960:960' | '834:1112' | '720:1280' — The resolution of the output video. Seedance 2.0 Mini supports 480p and 720p only. - `references` object[] — An optional array of image references (up to 9). See [our docs](/assets/inputs#images) on image inputs for more information. - `uri` union, required — A HTTPS URL, Runway or data URI containing an encoded image. See [our docs](/assets/inputs#images) on image inputs for more information. - string — A HTTPS URL, Runway upload URI, or base64 data URI (e.g. `data:image/png;base64,...`, up to 5MB) containing an encoded image. See [our docs](/assets/inputs#images) on image inputs for more information. - string — A Runway upload URI. See https://docs.dev.runwayml.com/assets/uploads for more information. - string — A data URI containing encoded media. - `referenceVideos` object[] — An optional array of video references. The combined duration across all video references must not exceed 15 seconds. See [our docs](/assets/inputs#videos) on video inputs for more information. - `type` 'video', required - `uri` union, required — A HTTPS URL, Runway or data URI containing an encoded video. See [our docs](/assets/inputs#videos) on video inputs for more information. - string — A HTTPS URL, Runway upload URI, or base64 data URI (e.g. `data:video/mp4;base64,...`, up to 16MB) containing an encoded video. See [our docs](/assets/inputs#videos) on video inputs for more information. - string — A Runway upload URI. See https://docs.dev.runwayml.com/assets/uploads for more information. - string — A data URI containing encoded media. - `referenceAudio` object[] — An optional array of audio references. The total combined duration must not exceed 15 seconds. - `type` 'audio', required - `uri` union, required — A HTTPS URL, Runway or data URI containing an encoded audio. See [our docs](/assets/inputs#audio) on audio inputs for more information. - string — A HTTPS URL, Runway upload URI, or base64 data URI (e.g. `data:audio/mp3;base64,...`, up to 16MB) containing an encoded audio. See [our docs](/assets/inputs#audio) on audio inputs for more information. - string — A Runway upload URI. See https://docs.dev.runwayml.com/assets/uploads for more information. - string — A data URI containing encoded media. - `model` 'seedance2_mini', required - object - `promptText` string, required — A non-empty text prompt describing the video to generate. - `ratio` '1280:720' | '720:1280' — The aspect ratio of the output video: `1280:720` (landscape) or `720:1280` (portrait). - `duration` integer — The duration of the output video in seconds, as a whole number from 3 to 10. - `model` 'gemini_omni_flash', required - object - `promptText` string — An optional text prompt up to 15000 characters describing what should appear in the output. - `audio` boolean — Whether to generate audio for the video. - `duration` integer — The number of seconds of duration for the output video. - `ratio` '992:432' | '854:480' | '752:560' | '640:640' | '560:752' | '480:854' | '1470:630' | '1280:720' | '1112:834' | '960:960' | '834:1112' | '720:1280' | '2206:946' | '1920:1080' | '1664:1248' | '1440:1440' | '1248:1664' | '1080:1920' — The resolution of the output video. Seedance 2.5 supports 480p, 720p, and 1080p. - `references` object[] — An optional array of image references (up to 30). See [our docs](/assets/inputs#images) on image inputs for more information. - `uri` union, required — A HTTPS URL, Runway or data URI containing an encoded image. See [our docs](/assets/inputs#images) on image inputs for more information. - string — A HTTPS URL, Runway upload URI, or base64 data URI (e.g. `data:image/png;base64,...`, up to 5MB) containing an encoded image. See [our docs](/assets/inputs#images) on image inputs for more information. - string — A Runway upload URI. See https://docs.dev.runwayml.com/assets/uploads for more information. - string — A data URI containing encoded media. - `referenceVideos` object[] — An optional array of video references. The combined duration across all video references must not exceed 30 seconds. See [our docs](/assets/inputs#videos) on video inputs for more information. - `type` 'video', required - `uri` union, required — A HTTPS URL, Runway or data URI containing an encoded video. See [our docs](/assets/inputs#videos) on video inputs for more information. - string — A HTTPS URL, Runway upload URI, or base64 data URI (e.g. `data:video/mp4;base64,...`, up to 16MB) containing an encoded video. See [our docs](/assets/inputs#videos) on video inputs for more information. - string — A Runway upload URI. See https://docs.dev.runwayml.com/assets/uploads for more information. - string — A data URI containing encoded media. - `referenceAudio` object[] — An optional array of audio references. The total combined duration must be less than 30 seconds. - `type` 'audio', required - `uri` union, required — A HTTPS URL, Runway or data URI containing an encoded audio. See [our docs](/assets/inputs#audio) on audio inputs for more information. - string — A HTTPS URL, Runway upload URI, or base64 data URI (e.g. `data:audio/mp3;base64,...`, up to 16MB) containing an encoded audio. See [our docs](/assets/inputs#audio) on audio inputs for more information. - string — A Runway upload URI. See https://docs.dev.runwayml.com/assets/uploads for more information. - string — A data URI containing encoded media. - `model` 'seedance2_5', required - object - `promptText` string, required — A non-empty text prompt describing what should appear in the output. - `resolution` '480p' | '720p' | '1080p' — The output resolution. Requests with image references are capped at 720p. - `duration` integer — The number of seconds of duration for the output video. - `ratio` '1:1' | '16:9' | '9:16' | '4:3' | '3:4' | '3:2' | '2:3' — The aspect ratio of the output video. - `references` object[] — An optional array of image references. Referenced images can be addressed in the prompt as [Image 1], [Image 2], and so on. See [our docs](/assets/inputs#images) on image inputs for more information. - `uri` union, required — A HTTPS URL, Runway or data URI containing an encoded image. See [our docs](/assets/inputs#images) on image inputs for more information. - string — A HTTPS URL, Runway upload URI, or base64 data URI (e.g. `data:image/png;base64,...`, up to 5MB) containing an encoded image. See [our docs](/assets/inputs#images) on image inputs for more information. - string — A Runway upload URI. See https://docs.dev.runwayml.com/assets/uploads for more information. - string — A data URI containing encoded media. - `referenceAudio` object[] — An optional array of audio references. Audio references require at least one image reference, and each clip must be between 3 and 15 seconds. - `type` 'audio', required - `uri` union, required — A HTTPS URL, Runway or data URI containing an encoded audio. See [our docs](/assets/inputs#audio) on audio inputs for more information. - string — A HTTPS URL, Runway upload URI, or base64 data URI (e.g. `data:audio/mp3;base64,...`, up to 16MB) containing an encoded audio. See [our docs](/assets/inputs#audio) on audio inputs for more information. - string — A Runway upload URI. See https://docs.dev.runwayml.com/assets/uploads for more information. - string — A data URI containing encoded media. - `model` 'grok_imagine_1_5', required ## Response `200` The task that was created. - object - `id` string, uuid, required — The ID of the task that was created. Use this to retrieve the task later. - `estimatedCost` object, required — The maximum credits this task may charge. The final amount may be lower after the task completes. - `credits` number, required — Estimated cost of the generation in credits. ## Other responses - `400` — The request was rejected. Inspect `error` or `issues` (when present) and retry with a corrected request. - `429` — You have exceeded the rate limit for this endpoint. ## Changes - **2026-08-24** `efc9e5abc4d0` — 7 info - added the new `hdr10` enum value to the request property `oneOf[subschema #1: gen4.5]/outputFormat` - added the new `hdr_exr_sequence` enum value to the request property `oneOf[subschema #1: gen4.5]/outputFormat` - added the new `hdr_png_sequence` enum value to the request property `oneOf[subschema #1: gen4.5]/outputFormat` - added the new `hdr_pq_12bit_master` enum value to the request property `oneOf[subschema #1: gen4.5]/outputFormat` - …3 more - **2026-08-18** `3f3a4647d82f` — 7 info - added `subschema #11: grok_imagine_1_5` to the request body `oneOf` list - added the new `1080:1920` enum value to the request property `oneOf[subschema #10: seedance2_5]/ratio` - added the new `1248:1664` enum value to the request property `oneOf[subschema #10: seedance2_5]/ratio` - added the new `1440:1440` enum value to the request property `oneOf[subschema #10: seedance2_5]/ratio` - …3 more - **2026-08-07** `73a12c23285c` — 1 breaking, 5 info - removed `subschema #9: veo3` from the request body `oneOf` list - added the new optional request property `oneOf[subschema #1: gen4.5]/outputFormat` - added the new optional request property `oneOf[subschema #1: gen4.5]/proresProfile` - added `subschema #4: hailuo3, subschema #10: seedance2_5` to the request body `oneOf` list - …2 more - …earlier changes not shown [Full history](https://skmtc.dev/runwayml/apis/runwayml-api/changes/v1/text_to_video/post.md) --- [API](https://skmtc.dev/runwayml/apis/runwayml-api.md) · [All operations](https://skmtc.dev/runwayml/apis/runwayml-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/runwayml/runwayml-api/revisions/efc9e5abc4d0/schema)