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        "kind": "SPEECH",
        "openWeights": false,
        "modalities": {
          "input": [
            "text"
          ],
          "output": [
            "audio"
          ]
        },
        "releaseDate": "2026-03-01",
        "sources": [
          "models-dev"
        ],
        "lastVerified": "2026-11-05",
        "vendor": "stepfun",
        "ref": "stepfun/step-tts-2"
      },
      {
        "id": "stepaudio-2.5-tts",
        "label": "StepAudio 2.5 TTS",
        "kind": "SPEECH",
        "openWeights": false,
        "modalities": {
          "input": [
            "text"
          ],
          "output": [
            "audio"
          ]
        },
        "releaseDate": "2026-04-16",
        "sources": [
          "models-dev"
        ],
        "lastVerified": "2026-11-05",
        "vendor": "stepfun",
        "ref": "stepfun/stepaudio-2.5-tts"
      }
    ]
  }
}