Eleven Flash v2.5
Eleven Flash v2.5 is a real time text to speech model for voice agents and interactive apps. It delivers natural speech in about 75 ms latency across 32 languages. Use it for low latency conversational AI, games, live tools, and large scale TTS workloads.
Complete technical specification for integration
Ready-to-use code snippets for common workflows
Antique Planetarium Welcome Address
Good evening, travelers. In a few moments, the dome above you will dim, and the first stars of tonight's program will appear. Please settle into your seats and let your eyes adjust to the dark. We will begin close to home, tracing the familiar line of the winter constellations, then drift outward beyond the bright edge of our neighborhood into regions where distance is measured in centuries of light. If you are joining us for the first time, you do not need to know any names. Simply look up, follow the guiding beam, and listen. By the end of our journey, the sky may feel a little larger, and Earth a little more precious.
{
"taskType": "audioInference",
"taskUUID": "8b925346-7add-40c7-a184-bc91ec4a95cb",
"model": "elevenlabs:24@1",
"seed": 82622,
"speech": {
"language": "en",
"text": "Good evening, travelers. In a few moments, the dome above you will dim, and the first stars of tonight's program will appear. Please settle into your seats and let your eyes adjust to the dark. We will begin close to home, tracing the familiar line of the winter constellations, then drift outward beyond the bright edge of our neighborhood into regions where distance is measured in centuries of light. If you are joining us for the first time, you do not need to know any names. Simply look up, follow the guiding beam, and listen. By the end of our journey, the sky may feel a little larger, and Earth a little more precious."
},
"providerSettings": {
"elevenlabs": {
"textToSpeech": {
"applyTextNormalization": "auto",
"voiceSettings": {
"stability": 0.42,
"similarityBoost": 0.78,
"style": 0.58,
"useSpeakerBoost": true
}
}
}
}
}{
"taskType": "audioInference",
"taskUUID": "8b925346-7add-40c7-a184-bc91ec4a95cb",
"audioUUID": "641f7e37-d5e9-4f75-b76d-014a17bde046",
"audioURL": "https://am.runware.ai/audio/os/a12d13/ws/5/ai/641f7e37-d5e9-4f75-b76d-014a17bde046.mp3",
"seed": 82622,
"cost": 0.08947
}Emergency Tram Intercom Bulletin
Attention passengers: service on the East Loop is temporarily paused between Harbor Gate and Pine Junction due to a signal fault. Shuttle buses are departing from Bay 3 every 12 minutes. If you are traveling to Riverside Terminal, remain on board for the alternate route announcement in 30 seconds. We apologize for the disruption and thank you for your patience.
{
"taskType": "audioInference",
"taskUUID": "4f10c705-5472-4315-a757-5c70f22f0a50",
"model": "elevenlabs:24@1",
"seed": 43900,
"speech": {
"text": "Attention passengers: service on the East Loop is temporarily paused between Harbor Gate and Pine Junction due to a signal fault. Shuttle buses are departing from Bay 3 every 12 minutes. If you are traveling to Riverside Terminal, remain on board for the alternate route announcement in 30 seconds. We apologize for the disruption and thank you for your patience.",
"language": "en"
},
"providerSettings": {
"elevenlabs": {
"textToSpeech": {
"voiceSettings": {
"stability": 0.72,
"similarityBoost": 0.78,
"style": 0.34,
"useSpeakerBoost": true
},
"applyTextNormalization": "on",
"previousText": "Good afternoon, this is a network update.",
"nextText": "Please listen for further instructions from station staff."
}
}
}
}{
"taskType": "audioInference",
"taskUUID": "4f10c705-5472-4315-a757-5c70f22f0a50",
"audioUUID": "57bf6f10-0a1a-4148-8c8a-31dc8710ea5c",
"audioURL": "https://am.runware.ai/audio/os/a25d05/ws/5/ai/57bf6f10-0a1a-4148-8c8a-31dc8710ea5c.mp3",
"seed": 43900,
"cost": 0.05407
}Orbital Docking Countdown Brief
Attention inbound crew of the cargo shuttle Peregrine. Docking corridor C-12 is now active. Approach speed should not exceed 0.3 meters per second beyond the outer guide ring. Crosswinds from vent array 4 may cause minor drift on port-side thrusters. Window for final alignment opens in 18 seconds. If your guidance display flickers, maintain heading and await manual tone confirmation. Repeat: maintain heading. Dockmaster Hale authorizing clamp sequence on my count. Three. Two. One. Contact expected now.
{
"taskType": "audioInference",
"taskUUID": "8b10a718-b30e-468e-afd3-cf69336ad9a4",
"model": "elevenlabs:24@1",
"seed": 88075,
"speech": {
"text": "Attention inbound crew of the cargo shuttle Peregrine. Docking corridor C-12 is now active. Approach speed should not exceed 0.3 meters per second beyond the outer guide ring. Crosswinds from vent array 4 may cause minor drift on port-side thrusters. Window for final alignment opens in 18 seconds. If your guidance display flickers, maintain heading and await manual tone confirmation. Repeat: maintain heading. Dockmaster Hale authorizing clamp sequence on my count. Three. Two. One. Contact expected now.",
"language": "en"
},
"providerSettings": {
"elevenlabs": {
"textToSpeech": {
"applyTextNormalization": "on",
"voiceSettings": {
"stability": 0.42,
"similarityBoost": 0.78,
"style": 0.61,
"useSpeakerBoost": true
}
}
}
}
}{
"taskType": "audioInference",
"taskUUID": "8b10a718-b30e-468e-afd3-cf69336ad9a4",
"audioUUID": "d4b213ca-fd39-4446-a7ec-34774eb20619",
"audioURL": "https://am.runware.ai/audio/os/a23d05/ws/5/ai/d4b213ca-fd39-4446-a7ec-34774eb20619.mp3",
"seed": 88075,
"cost": 0.09306
}Submersible Black Box Transmission
Archive buoy Kappa-seven, this is pilot Mirek Voss transmitting from bathysphere Nacre. If this reaches surface control, note the following in order. Primary floodgate sealed at fourteen minutes past shift change. Port thruster unresponsive after contact with loose cable or vine-like debris. Cabin pressure stable for now. I am reducing power to navigation glass and heating to preserve emergency cells. There is a repeating metallic tapping on the outer hull every eleven seconds. It is too regular to be current or drift. I have marked my position against the canyon wall using the last flare. Please do not send an automated ping burst; the echo in this trench is distorting sonar returns. Send a quiet approach team with a manual line. If Lena is on comms, tell her the charm tied to panel three was right. The old maps were wrong by nearly a full kilometer. End log, and please confirm receipt.
{
"taskType": "audioInference",
"taskUUID": "8888535a-2ee9-4af6-99ed-b0376a3eb5ad",
"model": "elevenlabs:24@1",
"seed": 65534,
"speech": {
"text": "Archive buoy Kappa-seven, this is pilot Mirek Voss transmitting from bathysphere Nacre. If this reaches surface control, note the following in order. Primary floodgate sealed at fourteen minutes past shift change. Port thruster unresponsive after contact with loose cable or vine-like debris. Cabin pressure stable for now. I am reducing power to navigation glass and heating to preserve emergency cells. There is a repeating metallic tapping on the outer hull every eleven seconds. It is too regular to be current or drift. I have marked my position against the canyon wall using the last flare. Please do not send an automated ping burst; the echo in this trench is distorting sonar returns. Send a quiet approach team with a manual line. If Lena is on comms, tell her the charm tied to panel three was right. The old maps were wrong by nearly a full kilometer. End log, and please confirm receipt.",
"language": "en"
},
"providerSettings": {
"elevenlabs": {
"textToSpeech": {
"previousText": "Bathysphere Nacre emergency log begins after impact alarm.",
"nextText": "Secondary note: oxygen reserve estimate pending manual recalculation.",
"applyTextNormalization": "auto",
"voiceSettings": {
"stability": 0.42,
"similarityBoost": 0.72,
"style": 0.58,
"useSpeakerBoost": true
}
}
}
}
}{
"taskType": "audioInference",
"taskUUID": "8888535a-2ee9-4af6-99ed-b0376a3eb5ad",
"audioUUID": "8a21b704-fb41-4e19-9093-4dddbe9f1eb3",
"audioURL": "https://am.runware.ai/audio/os/a04d20/ws/5/ai/8a21b704-fb41-4e19-9093-4dddbe9f1eb3.mp3",
"seed": 65534,
"cost": 0.14426
}