Google TTS Chirp 3 HD vs BytePlus Seed TTS 2.0
何时使用哪一个 — 经过整理的结论,而非基准测试表格
根据产品参数,这两者是可互换的:google-tts-chirp3-hd 和 seed-tts-2.0 均收取每百万输入 token $30,都具备 4096 token 的上下文窗口,且都在相同的语音能力下接受文本输入并返回音频。由于没有费率、上下文或模态差异需要权衡,选择的决定因素在于供应商偏好——google-tts-chirp3-hd 属于 Google,seed-tts-2.0 属于 ByteDance——以及你的听众在 A/B 测试中更喜欢哪种语音输出。两者的预算和提示词长度规划可以完全相同。
定价
| Google TTS Chirp 3 HD | BytePlus Seed TTS 2.0 | Δ | |
|---|---|---|---|
| 每 1M 字符 | $30 | $30 | = |
费率取自构建时的实时目录;每个模型页面均附有当前的费率卡。
它们的位置 — 以该计费单位计费的所有 7 个 文本转语音 模型的 每 1M 字符的价格(对数刻度)
能力
| Google TTS Chirp 3 HD | BytePlus Seed TTS 2.0 | |
|---|---|---|
| 流式传输 | 是 | 是 |
| SSML | preview | unsupported |
| 计费单位 | character | character |
规格
| Google TTS Chirp 3 HD | BytePlus Seed TTS 2.0 | |
|---|---|---|
| 输入模态 | 文本 | 文本 |
| 输出模态 | 音频 | 音频 |
| 请求限制 | 5000 bytes | — |
| 声音 | 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. | TTS 2.0 voices carry *_uranus_bigtts speaker IDs and are listed by scenario (General, Entertainment, Education, Dubbing, AudioBook, RolePlay, CustomerService) on the Voice List page per-voice emotion via audio_params.emotion with emotion_scale 1 to 5 (default 4), speech_rate and loudness_rate in [-50, 100], and post_process.pitch in [-12, 12]. |
| 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. | English, Chinese, Japanese, German, French, Mexican Spanish, Indonesian Bahasa, Brazilian Portuguese, Italian and Korean |
| 语音控制 |
| context_texts and section_id are TTS 2.0 only: a plain-language instruction steers rate, emotion, volume and style (only the first list value takes effect, and its text is not billed), and section_id links up to 30 rounds or 10 minutes of earlier synthesis as historical context. |
| 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. | Integration via uni-directional streaming HTTP, uni- or bi-directional streaming WebSocket and online SDK sampling rate 24K/16K/8K on the uni-directional streaming and non-streaming interfaces, 48K/24K/16K/8K on the bi-directional interface output PCM, OGG_OPUS or MP3 (WAV is accepted but returns multiple headers when streaming) SSML is not supported |
规格转录自各供应商的文档;若供应商未发布某项数据,则直接省略该行,而非进行推断。 完整来源: Google TTS Chirp 3 HD · BytePlus Seed TTS 2.0
只需一行代码即可在它们之间切换
两个 ID 都包含在下方的每个选项卡中 — 高亮显示的两行是唯一的修改。相同的端点,相同的密钥,相同的请求结构。
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="seed-tts-2.0", # 取消注释此行,注释上一行
file=open("meeting.mp3", "rb"),
language="en",
)
print(resp.text)import OpenAI from "openai";
import fs from "node:fs";
const client = new OpenAI({
baseURL: "https://synthorai.io/v1",
apiKey: "sk-syn-...",
});
const resp = await client.audio.transcriptions.create({
model: "google-tts-chirp3-hd",
// model: "seed-tts-2.0", // 取消注释此行,注释上一行
file: fs.createReadStream("meeting.mp3"),
});
console.log(resp.text);curl https://synthorai.io/v1/audio/transcriptions \
-H "Authorization: Bearer sk-syn-..." \
-F model="google-tts-chirp3-hd" \
# -F model="seed-tts-2.0" \ # 取消注释此行,注释上一行
-F file=@meeting.mp3package main
import (
"context"
"fmt"
"os"
"github.com/openai/openai-go/v3"
"github.com/openai/openai-go/v3/option"
)
func main() {
client := openai.NewClient(
option.WithBaseURL("https://synthorai.io/v1"),
option.WithAPIKey("sk-syn-..."),
)
f, _ := os.Open("meeting.mp3")
resp, _ := client.Audio.Transcriptions.New(context.TODO(), openai.AudioTranscriptionNewParams{
Model: "google-tts-chirp3-hd",
// Model: "seed-tts-2.0", // 取消注释此行,注释上一行
File: f,
})
fmt.Println(resp.Text)
}import com.openai.client.OpenAIClient;
import com.openai.client.okhttp.OpenAIOkHttpClient;
import com.openai.models.audio.transcriptions.*;
import java.nio.file.Paths;
OpenAIClient client = OpenAIOkHttpClient.builder()
.baseUrl("https://synthorai.io/v1")
.apiKey("sk-syn-...")
.build();
Transcription resp = client.audio().transcriptions().create(
TranscriptionCreateParams.builder()
.model("google-tts-chirp3-hd")
// .model("seed-tts-2.0") // 取消注释此行,注释上一行
.file(Paths.get("meeting.mp3"))
.build()).asTranscription();
System.out.println(resp.text());常见问题
Google TTS Chirp 3 HD 和 BytePlus Seed TTS 2.0 哪个更便宜?
它们列出的 每 1m 字符 相同($30),因此价格不是这一项的决定因素——请参考下文的规格与能力。
我可以在不进行两次集成的情况下,对 Google TTS Chirp 3 HD 和 BytePlus Seed TTS 2.0 进行 A/B 测试吗?
可以。两者均通过同一个兼容 OpenAI 的端点提供服务,并使用同一把 API 密钥——切换只需更改一行模型字符串,因此你可以将一部分流量路由到各个模型并直接比较账单。
文本转语音如何计费?
按输入文本的字符数计费,每次请求的字符上限如规格表所示。无论使用哪种模型,长文本都必须在多个请求中分块。