{
	"model_id": "inworld/tts-1.5-mini",
	"provider_id": "inworld",
	"name": "Inworld TTS 1.5 Mini",
	"description": "Ultra-fast, cost-efficient text-to-speech with approximately 120ms latency and 15-language support.",
	"task": "Text-to-Speech",
	"tags": [
		"TTS",
		"Speech Synthesis",
		"Ultra-Low Latency",
		"Multilingual",
		"Cost-Efficient"
	],
	"context_length": null,
	"max_output_tokens": null,
	"schema_version": "1.0.0",
	"pricing": {
		"Per character": 0.000015
	},
	"examples": [
		{
			"name": "Simple Speech",
			"description": "Generate speech with default settings",
			"input": {
				"output_format": "mp3",
				"temperature": 1,
				"text": "Hello! Welcome to Cloudflare AI Gateway. Let me show you what we can do.",
				"timestamp_type": "none",
				"voice_id": "Dennis"
			},
			"output": {
				"audio": "https://pub-04a6d208d361438ea01b797e6973bd19.r2.dev/catalog/inworld__tts-1.5-mini/simple-speech.mp3"
			},
			"raw_response": {
				"gatewayMetadata": {
					"keySource": "Unified"
				},
				"result": {
					"audio": "https://pub-04a6d208d361438ea01b797e6973bd19.r2.dev/catalog/inworld__tts-1.5-mini/simple-speech.mp3"
				},
				"state": "Completed"
			},
			"code_snippets": [
				{
					"label": "typescript",
					"language": "typescript",
					"code": "const response = await env.AI.run(\n  'inworld/tts-1.5-mini',\n  {\n    output_format: 'mp3',\n    temperature: 1,\n    text: 'Hello! Welcome to Cloudflare AI Gateway. Let me show you what we can do.',\n    timestamp_type: 'none',\n    voice_id: 'Dennis',\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 $CLOUDFLARE_API_TOKEN\" \\\n  --header \"Content-Type: application/json\" \\\n  --data '{\n  \"model\": \"inworld/tts-1.5-mini\",\n  \"input\": {\n    \"output_format\": \"mp3\",\n    \"temperature\": 1,\n    \"text\": \"Hello! Welcome to Cloudflare AI Gateway. Let me show you what we can do.\",\n    \"timestamp_type\": \"none\",\n    \"voice_id\": \"Dennis\"\n  }\n}'"
				}
			]
		},
		{
			"name": "Fast Speech",
			"description": "Speed up speech for quick playback",
			"input": {
				"output_format": "mp3",
				"speaking_rate": 1.4,
				"temperature": 1,
				"text": "This is a fast-paced summary of the key findings from the quarterly report. Revenue is up fifteen percent and user growth exceeded expectations.",
				"timestamp_type": "none",
				"voice_id": "Dennis"
			},
			"output": {
				"audio": "https://pub-04a6d208d361438ea01b797e6973bd19.r2.dev/catalog/inworld__tts-1.5-mini/fast-speech.mp3"
			},
			"raw_response": {
				"gatewayMetadata": {
					"keySource": "Unified"
				},
				"result": {
					"audio": "https://pub-04a6d208d361438ea01b797e6973bd19.r2.dev/catalog/inworld__tts-1.5-mini/fast-speech.mp3"
				},
				"state": "Completed"
			},
			"code_snippets": [
				{
					"label": "typescript",
					"language": "typescript",
					"code": "const response = await env.AI.run(\n  'inworld/tts-1.5-mini',\n  {\n    output_format: 'mp3',\n    speaking_rate: 1.4,\n    temperature: 1,\n    text: 'This is a fast-paced summary of the key findings from the quarterly report. Revenue is up fifteen percent and user growth exceeded expectations.',\n    timestamp_type: 'none',\n    voice_id: 'Dennis',\n  },\n)\nconsole.log(response)"
				},
				{
					"label": "curl",
					"language": "bash",
					"code": "curl https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/run \\\n  --header \"Authorization: Bearer $CLOUDFLARE_API_TOKEN\" \\\n  --header \"Content-Type: application/json\" \\\n  --data '{\n  \"model\": \"inworld/tts-1.5-mini\",\n  \"input\": {\n    \"output_format\": \"mp3\",\n    \"speaking_rate\": 1.4,\n    \"temperature\": 1,\n    \"text\": \"This is a fast-paced summary of the key findings from the quarterly report. Revenue is up fifteen percent and user growth exceeded expectations.\",\n    \"timestamp_type\": \"none\",\n    \"voice_id\": \"Dennis\"\n  }\n}'"
				}
			]
		},
		{
			"name": "Low Latency",
			"description": "Minimize latency by disabling text normalization",
			"input": {
				"apply_text_normalization": false,
				"output_format": "mp3",
				"temperature": 1,
				"text": "Quick response needed. The server is ready.",
				"timestamp_type": "none",
				"voice_id": "Dennis"
			},
			"output": {
				"audio": "https://pub-04a6d208d361438ea01b797e6973bd19.r2.dev/catalog/inworld__tts-1.5-mini/low-latency.mp3"
			},
			"raw_response": {
				"gatewayMetadata": {
					"keySource": "Unified"
				},
				"result": {
					"audio": "https://pub-04a6d208d361438ea01b797e6973bd19.r2.dev/catalog/inworld__tts-1.5-mini/low-latency.mp3"
				},
				"state": "Completed"
			},
			"code_snippets": [
				{
					"label": "typescript",
					"language": "typescript",
					"code": "const response = await env.AI.run(\n  'inworld/tts-1.5-mini',\n  {\n    apply_text_normalization: false,\n    output_format: 'mp3',\n    temperature: 1,\n    text: 'Quick response needed. The server is ready.',\n    timestamp_type: 'none',\n    voice_id: 'Dennis',\n  },\n)\nconsole.log(response)"
				},
				{
					"label": "curl",
					"language": "bash",
					"code": "curl https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/run \\\n  --header \"Authorization: Bearer $CLOUDFLARE_API_TOKEN\" \\\n  --header \"Content-Type: application/json\" \\\n  --data '{\n  \"model\": \"inworld/tts-1.5-mini\",\n  \"input\": {\n    \"apply_text_normalization\": false,\n    \"output_format\": \"mp3\",\n    \"temperature\": 1,\n    \"text\": \"Quick response needed. The server is ready.\",\n    \"timestamp_type\": \"none\",\n    \"voice_id\": \"Dennis\"\n  }\n}'"
				}
			]
		}
	],
	"default_example": null,
	"code_snippets": [],
	"supports_async": false,
	"zdr": true,
	"zdr_comment": null,
	"external_info": "https://inworld.ai/",
	"terms": "https://inworld.ai/terms",
	"cover_image_url": "https://pub-26f1392c1b674324be6786695bd72257.r2.dev/inworld/tts-1.5-mini.png",
	"metadata": {
		"Languages": "15",
		"Latency": "~120ms"
	},
	"request_formats": null,
	"providers": null,
	"provider_details": [
		{
			"id": "inworld",
			"pricing": {
				"input_characters": 0.000015
			}
		}
	],
	"banner": null,
	"created_at": "2026-05-22 17:53:16",
	"schema": {
		"input": {
			"$schema": "https://json-schema.org/draft/2020-12/schema",
			"type": "object",
			"properties": {
				"text": {
					"type": "string",
					"maxLength": 2000,
					"description": "The text to be synthesized into speech. Maximum input of 2,000 characters."
				},
				"voice_id": {
					"default": "Dennis",
					"description": "The ID of the voice to use for synthesizing speech. Defaults to Dennis.",
					"type": "string",
					"enum": [
						"Loretta",
						"Darlene",
						"Marlene",
						"Hank",
						"Evelyn",
						"Celeste",
						"Pippa",
						"Tessa",
						"Liam",
						"Callum",
						"Hamish",
						"Abby",
						"Graham",
						"Rupert",
						"Mortimer",
						"Snik",
						"Anjali",
						"Saanvi",
						"Arjun",
						"Claire",
						"Oliver",
						"Simon",
						"Elliot",
						"James",
						"Serena",
						"Gareth",
						"Vinny",
						"Lauren",
						"Jessica",
						"Ethan",
						"Tyler",
						"Jason",
						"Chloe",
						"Veronica",
						"Victoria",
						"Miranda",
						"Sebastian",
						"Victor",
						"Malcolm",
						"Nate",
						"Brian",
						"Amina",
						"Kelsey",
						"Derek",
						"Evan",
						"Kayla",
						"Jake",
						"Grant",
						"Tristan",
						"Nadia",
						"Selene",
						"Marcus",
						"Riley",
						"Damon",
						"Cedric",
						"Mia",
						"Naomi",
						"Jonah",
						"Levi",
						"Avery",
						"Brandon",
						"Conrad",
						"Bianca",
						"Lucian",
						"Trevor",
						"Alex",
						"Ashley",
						"Craig",
						"Deborah",
						"Dennis",
						"Edward",
						"Elizabeth",
						"Hades",
						"Julia",
						"Pixie",
						"Mark",
						"Olivia",
						"Priya",
						"Ronald",
						"Sarah",
						"Shaun",
						"Theodore",
						"Timothy",
						"Wendy",
						"Dominus",
						"Hana",
						"Clive",
						"Carter",
						"Blake",
						"Luna",
						"Reed",
						"Duncan",
						"Felix",
						"Eleanor",
						"Sophie"
					]
				},
				"output_format": {
					"default": "mp3",
					"description": "The output format for the audio. Supported formats are mp3, opus, wav, and flac. Defaults to mp3.",
					"type": "string",
					"enum": [
						"mp3",
						"opus",
						"wav",
						"flac"
					]
				},
				"bit_rate": {
					"description": "Bits per second of the audio. Only for compressed audio formats (mp3, opus). The default is 128,000.",
					"type": "integer",
					"minimum": -9007199254740991,
					"maximum": 9007199254740991
				},
				"sample_rate": {
					"description": "The synthesis sample rate in hertz. Accepts: 8000, 16000, 22050, 24000, 32000, 44100, 48000. The default is 48,000.",
					"type": "integer",
					"minimum": -9007199254740991,
					"maximum": 9007199254740991
				},
				"speaking_rate": {
					"description": "Speaking rate/speed, in the range [0.5, 1.5]. The default is 1.0. We recommend using values above 0.8 to ensure high quality.",
					"type": "number",
					"minimum": 0.5,
					"maximum": 1.5
				},
				"temperature": {
					"default": 1,
					"description": "Determines the degree of randomness when sampling audio tokens. Defaults to 1.0. Accepts values between 0 (exclusive) and 2 (inclusive). Higher values = more expressive, lower values = more deterministic.",
					"type": "number",
					"minimum": 0.01,
					"maximum": 2
				},
				"timestamp_type": {
					"default": "none",
					"description": "Controls timestamp metadata returned with the audio. \"word\" returns word-level timing, \"character\" returns character-level timing. Note: adds latency. Defaults to none.",
					"type": "string",
					"enum": [
						"none",
						"word",
						"character"
					]
				},
				"apply_text_normalization": {
					"description": "When enabled, text normalization expands numbers, dates, times, and abbreviations before converting to speech. Turning this off may reduce latency.",
					"type": "boolean"
				}
			},
			"required": [
				"text",
				"voice_id",
				"output_format",
				"temperature",
				"timestamp_type"
			],
			"additionalProperties": false
		},
		"output": {
			"$schema": "https://json-schema.org/draft/2020-12/schema",
			"type": "object",
			"properties": {
				"audio": {
					"type": "string",
					"description": "URL to the generated audio file"
				}
			},
			"required": [
				"audio"
			],
			"additionalProperties": false
		}
	}
}