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				"redact_pii": false,
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				"redact_pii_policies": null,
				"redact_pii_sub": null,
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				"custom_spelling": null,
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				"language_code": "en",
				"keyterms_prompt": [
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					"microservices",
					"containerization",
					"load balancer"
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				"webhook_auth": false,
				"webhook_auth_header_name": null,
				"speed_boost": false,
				"auto_highlights_result": null,
				"auto_highlights": false,
				"audio_start_from": null,
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				"filter_profanity": false,
				"redact_pii": false,
				"redact_pii_audio": false,
				"redact_pii_audio_quality": null,
				"redact_pii_audio_options": null,
				"redact_pii_policies": null,
				"redact_pii_sub": null,
				"redact_static_entities": null,
				"speaker_labels": false,
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					"results": [],
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				"language_detection": false,
				"language_detection_options": null,
				"language_detection_results": null,
				"language_confidence_threshold": null,
				"language_confidence": null,
				"custom_spelling": null,
				"throttled": false,
				"auto_chapters": false,
				"summarization": false,
				"summary_type": null,
				"summary_model": null,
				"custom_topics": false,
				"topics": [],
				"speech_threshold": null,
				"speech_model": null,
				"speech_models": [
					"universal-3-5-pro"
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				"speech_model_used": "universal-3-5-pro",
				"temperature": null,
				"remove_audio_tags": "all",
				"chapters": null,
				"disfluencies": false,
				"entity_detection": false,
				"sentiment_analysis": false,
				"sentiment_analysis_results": null,
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				"speakers_expected": null,
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				"project_id": 1747096,
				"token_id": 1768830
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			"code_snippets": [
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					"label": "typescript",
					"language": "typescript",
					"code": "const response = await env.AI.run(\n  'assemblyai/universal-3.5-pro',\n  {\n    audio_url: 'https://cdn.openai.com/API/docs/audio/echo.wav',\n    language_code: 'en',\n    keyterms_prompt: ['Kubernetes', 'microservices', 'containerization', 'load balancer'],\n  },\n)\nconsole.log(response)"
				},
				{
					"label": "curl",
					"language": "bash",
					"code": "curl https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/run \\\n  --header \"Authorization: Bearer $CLOUDFLARE_API_TOKEN\" \\\n  --header \"Content-Type: application/json\" \\\n  --data '{\n  \"model\": \"assemblyai/universal-3.5-pro\",\n  \"input\": {\n    \"audio_url\": \"https://cdn.openai.com/API/docs/audio/echo.wav\",\n    \"language_code\": \"en\",\n    \"keyterms_prompt\": [\n      \"Kubernetes\",\n      \"microservices\",\n      \"containerization\",\n      \"load balancer\"\n    ]\n  }\n}'"
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	"external_info": "https://www.assemblyai.com/docs/getting-started/universal-3-5-pro",
	"terms": "https://www.assemblyai.com/legal/terms-of-service",
	"cover_image_url": "https://pub-26f1392c1b674324be6786695bd72257.r2.dev/assemblyai/universal-3.5-pro.png",
	"metadata": {
		"Languages": "18",
		"Input": "Pre-recorded audio and video"
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	"request_formats": null,
	"providers": null,
	"provider_details": [
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				"input_audio_minutes_keyterms": 0.00083,
				"input_audio_minutes_medical": 0.0025
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	"banner": null,
	"created_at": "2026-08-25 14:29:37",
	"schema": {
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			"$schema": "https://json-schema.org/draft/2020-12/schema",
			"type": "object",
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				"audio_url": {
					"type": "string",
					"description": "The URL of the audio or video file to transcribe, or a data URI."
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				"audio_start_from": {
					"description": "Timestamp in milliseconds at which to begin transcription.",
					"type": "integer",
					"minimum": 0,
					"maximum": 9007199254740991
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				"audio_end_at": {
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					"maximum": 9007199254740991
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				"language_code": {
					"description": "Language code of the audio.",
					"type": "string"
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				"language_detection": {
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					"type": "boolean"
				},
				"language_detection_options": {
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					"properties": {
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					"type": "array",
					"items": {
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				"format_text": {
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					"type": "boolean"
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				"disfluencies": {
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					"type": "boolean"
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				"filter_profanity": {
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					"type": "boolean"
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				"speaker_labels": {
					"description": "Whether to identify speakers in the transcript.",
					"type": "boolean"
				},
				"speakers_expected": {
					"description": "Expected number of speakers.",
					"type": "integer",
					"exclusiveMinimum": 0,
					"maximum": 9007199254740991
				},
				"speaker_options": {
					"type": "object",
					"properties": {
						"min_speakers_expected": {
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							"exclusiveMinimum": 0,
							"maximum": 9007199254740991
						},
						"max_speakers_expected": {
							"description": "Maximum number of speakers to identify.",
							"type": "integer",
							"exclusiveMinimum": 0,
							"maximum": 9007199254740991
						}
					},
					"additionalProperties": false
				},
				"multichannel": {
					"description": "Whether to transcribe each audio channel separately.",
					"type": "boolean"
				},
				"custom_spelling": {
					"type": "array",
					"items": {
						"type": "object",
						"properties": {
							"from": {
								"type": "array",
								"items": {
									"type": "string"
								},
								"description": "Words or phrases to replace."
							},
							"to": {
								"type": "string",
								"description": "Replacement word or phrase."
							}
						},
						"required": [
							"from",
							"to"
						],
						"additionalProperties": false
					}
				},
				"auto_highlights": {
					"description": "Whether to extract key phrases.",
					"type": "boolean"
				},
				"content_safety": {
					"description": "Whether to detect sensitive content.",
					"type": "boolean"
				},
				"content_safety_confidence": {
					"description": "Content safety confidence threshold from 25 to 100.",
					"type": "integer",
					"minimum": 25,
					"maximum": 100
				},
				"iab_categories": {
					"description": "Whether to classify topics using IAB categories.",
					"type": "boolean"
				},
				"entity_detection": {
					"description": "Whether to detect named entities.",
					"type": "boolean"
				},
				"sentiment_analysis": {
					"description": "Whether to analyze sentence sentiment.",
					"type": "boolean"
				},
				"domain": {
					"description": "Domain-specific model for medical terminology.",
					"type": "string",
					"const": "medical-v1"
				},
				"speech_threshold": {
					"description": "Minimum fraction of speech required for transcription.",
					"type": "number",
					"minimum": 0,
					"maximum": 1
				},
				"redact_pii": {
					"description": "Whether to redact personally identifiable information.",
					"type": "boolean"
				},
				"redact_pii_audio": {
					"description": "Whether to generate an audio file with spoken PII redacted.",
					"type": "boolean"
				},
				"redact_pii_audio_quality": {
					"description": "Format of the redacted audio file.",
					"type": "string",
					"enum": [
						"mp3",
						"wav"
					]
				},
				"redact_pii_audio_options": {
					"type": "object",
					"properties": {
						"return_redacted_no_speech_audio": {
							"description": "Whether to return redacted audio when no speech is detected.",
							"type": "boolean"
						},
						"override_audio_redaction_method": {
							"description": "Replace redacted speech with silence instead of a beep.",
							"type": "string",
							"const": "silence"
						}
					},
					"additionalProperties": false
				},
				"redact_pii_policies": {
					"description": "PII categories to redact.",
					"type": "array",
					"items": {
						"type": "string"
					}
				},
				"redact_pii_sub": {
					"description": "Replacement strategy for redacted PII.",
					"type": "string",
					"enum": [
						"entity_name",
						"hash"
					]
				},
				"redact_pii_return_unredacted": {
					"description": "Whether to include unredacted fields alongside the redacted transcript.",
					"type": "boolean"
				},
				"redact_static_entities": {
					"description": "User-defined terms to redact, grouped by label.",
					"type": "object",
					"propertyNames": {
						"type": "string"
					},
					"additionalProperties": {
						"type": "array",
						"items": {
							"type": "string"
						}
					}
				}
			},
			"required": [
				"audio_url"
			],
			"additionalProperties": false
		},
		"output": {
			"$schema": "https://json-schema.org/draft/2020-12/schema",
			"type": "object",
			"properties": {
				"text": {
					"type": "string",
					"description": "The transcribed text."
				},
				"words": {
					"description": "Word-level timestamps and confidence scores.",
					"anyOf": [
						{
							"type": "array",
							"items": {
								"type": "object",
								"properties": {
									"text": {
										"type": "string"
									},
									"start": {
										"type": "number"
									},
									"end": {
										"type": "number"
									},
									"confidence": {
										"type": "number"
									},
									"speaker": {
										"type": [
											"string",
											"null"
										]
									}
								},
								"required": [
									"text",
									"start",
									"end",
									"confidence"
								],
								"additionalProperties": false
							}
						},
						{
							"type": "null"
						}
					]
				},
				"utterances": {
					"description": "Speaker-separated utterances (when speaker_labels is enabled).",
					"anyOf": [
						{
							"type": "array",
							"items": {
								"type": "object",
								"properties": {
									"text": {
										"type": "string"
									},
									"start": {
										"type": "number"
									},
									"end": {
										"type": "number"
									},
									"confidence": {
										"type": "number"
									},
									"speaker": {
										"type": "string"
									}
								},
								"required": [
									"text",
									"start",
									"end",
									"confidence",
									"speaker"
								],
								"additionalProperties": false
							}
						},
						{
							"type": "null"
						}
					]
				},
				"confidence": {
					"description": "Overall confidence score for the transcription.",
					"type": [
						"number",
						"null"
					]
				},
				"language_code": {
					"description": "Detected or specified language code.",
					"type": [
						"string",
						"null"
					]
				},
				"language_confidence": {
					"description": "Confidence score for language detection.",
					"type": [
						"number",
						"null"
					]
				}
			},
			"required": [
				"text"
			],
			"additionalProperties": false
		}
	}
}