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Google TTS Chirp 3 HD vs TTS-1 HD

vs

什么时候选哪个

两者都是每百万字符 $30,也都支持流式,所以差别在控制力和长度:google-tts-chirp3-hd 每次请求接受 5000 字节,提供数值型语音参数并把 SSML 列为预览;tts-1-hd 接受 4096 个字符,完全没有音色控制。两者覆盖都很广,只是 tts-1-hd 的列表跟随 Whisper 的语言集,而不是一份枚举出来的语言区清单。需要塑造交付效果时选 google-tts-chirp3-hd,默认音色够用时选 tts-1-hd。

价格

Google TTS Chirp 3 HD TTS-1 HD Δ
每 1M 字符 $30 $30 =

价格取自构建时的实时目录,最新价格见各模型页面。

两个模型所处的位置:全部 7 个按同一单位计费的文字转语音模型的每 1M 字符价格分布(对数刻度)

能力

Google TTS Chirp 3 HD TTS-1 HD
流式输出 是 是
SSML preview undocumented
计费单位 character character

规格

Google TTS Chirp 3 HD TTS-1 HD
输入模态 文本 文本
输出模态 音频 音频
发布日期 2025-03 2023-11-06
请求限制 5000 bytes 4096 characters
音色 Voices are named after stars and published with a gender: Achernar, Achird, Algenib, Algieba, Alnilam, Aoede, Autonoe, Callirrhoe, Charon, Despina, Enceladus, Erinome, Fenrir, Gacrux, Iapetus, Kore, Laomedeia, Leda, Orus, Pulcherrima, Puck, Rasalgethi, Sadachbia, Sadaltager, Schedar, Sulafat, Umbriel, Vindemiatrix, Zephyr and Zubenelgenubi. A locale prefix forms the id, e.g. en-US-Chirp3-HD-Charon. Google describes the set as 30 distinct styles across many languages. alloy, ash, coral, echo, fable, onyx, nova, sage and shimmer, a smaller set than the full 13-voice TTS list, and voices are currently optimized for English.
语言 ar-XA, bn-IN, bg-BG, yue-HK, hr-HR, cs-CZ, da-DK, nl-BE, nl-NL, en-AU, en-IN, en-GB, en-US, et-EE, fi-FI, fr-CA, fr-FR, de-DE, el-GR, gu-IN, he-IL, hi-IN, hu-HU, id-ID, it-IT, ja-JP, kn-IN, ko-KR, lv-LV, lt-LT, ml-IN, cmn-CN, mr-IN, nb-NO, pl-PL, pt-BR, pa-IN, ro-RO, ru-RU, sr-RS, sk-SK, sl-SI, es-ES, es-US, sw-KE, sv-SE, ta-IN, te-IN, th-TH, tr-TR, uk-UA, ur-IN and vi-VN. Generally follows the Whisper model’s language support: Afrikaans, Arabic, Armenian, Azerbaijani, Belarusian, Bosnian, Bulgarian, Catalan, Chinese, Croatian, Czech, Danish, Dutch, English, Estonian, Finnish, French, Galician, German, Greek, Hebrew, Hindi, Hungarian, Icelandic, Indonesian, Italian, Japanese, Kannada, Kazakh, Korean, Latvian, Lithuanian, Macedonian, Malay, Marathi, Maori, Nepali, Norwegian, Persian, Polish, Portuguese, Romanian, Russian, Serbian, Slovak, Slovenian, Spanish, Swahili, Swedish, Tagalog, Tamil, Thai, Turkish, Ukrainian, Urdu, Vietnamese and Welsh, despite voices being optimized for English
声音控制
  • Voice controls are Preview: pace via speaking_rate 0.25 to 2.0
  • pause tags [pause short], [pause long] and [pause] accepted only in the markup input field, never in text, and the model may disregard tags placed unnaturally
  • custom pronunciations in IPA or X-SAMPA
  • SSML support is Preview and synchronous-only, unsupported for streaming requests, with unlisted tags ignored and say-as interpret-as=expletive or bleep not supported
none
限制

Content limit of 5,000 total bytes per synthesize request. Default response format LINEAR16

streaming supports ALAW, MULAW, OGG_OPUS and PCM, batch adds MP3, so MP3 is not available on the streaming path. The only voice type Google's comparison table marks as streaming-capable. Generally available in the global, us and eu endpoints plus asia-southeast1, europe-west2 and asia-northeast1, but out of scope for regionalization and data residency. Billed per character including spaces and newlines, with all SSML tags except <mark> counted.

Speech generation endpoint (v1/audio/speech) only, with Chat Completions, Responses, Realtime, Batch and Fine-tuning all listed as not supported

input text is capped at 4096 characters

output mp3 (default), opus, aac, flac, wav or pcm (raw 24 kHz 16-bit signed little-endian samples)

realtime playback via chunked transfer encoding

规格照录自各供应商的文档;供应商没有公布的项目,对应的行直接省略,不做推断。 完整来源: Google TTS Chirp 3 HD · TTS-1 HD

改一行代码就能在两个模型之间切换

下方每个标签页里都有两个模型 ID,高亮的那两行是唯一要改的地方。端点不变,API key 不变,请求结构也不变。

from openai import OpenAI

client = OpenAI(
    base_url="https://synthorai.io/v1",
    api_key="sk-syn-...",
)

resp = client.audio.transcriptions.create(
    model="google-tts-chirp3-hd",
    # model="tts-1-hd",  # 取消注释此行,注释上一行
    file=open("meeting.mp3", "rb"),
    language="en",
)
print(resp.text)

获取 API key →

常见问题

Google TTS Chirp 3 HD 和 TTS-1 HD 哪个更便宜?

两个模型的「每 1M 字符」价格相同($30),所以这一项上价格分不出高下,请看下方的规格与能力。

不用分别集成两次,就能对 Google TTS Chirp 3 HD 和 TTS-1 HD 做 A/B 测试吗?

可以。两个模型走同一个 OpenAI 兼容端点,用同一个 API key,切换时只要改一行里的模型名,所以可以给两个模型各分一部分流量,直接对比账单。

文字转语音如何计费?

按输入文本的字符数计费,单次请求的字符上限见规格表。不管用哪个模型,长文本都得拆成多个请求。

相关对比

我们的实测研究