Fun-ASR
Provider list prices: no platform markup, pay-as-you-go. These are official list prices. Logged-in customers may see effective prices including workspace discounts on /console/pricing.
Use Fun-ASR in 30 seconds
OpenAI-compatible: swap the base_url, keep your SDK. POST /v1/audio/transcriptions
from openai import OpenAI
client = OpenAI(
base_url="https://synthorai.io/v1",
api_key="sk-syn-...",
)
resp = client.audio.transcriptions.create(
model="fun-asr",
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: "fun-asr",
file: fs.createReadStream("meeting.mp3"),
});
console.log(resp.text);curl https://synthorai.io/v1/audio/transcriptions \
-H "Authorization: Bearer sk-syn-..." \
-F model="fun-asr" \
-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: "fun-asr",
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("fun-asr")
.file(Paths.get("meeting.mp3"))
.build()).asTranscription();
System.out.println(resp.text());About Fun-ASR
Fun-ASR is Alibaba Cloud Model Studio's recording-file speech recognition model for offline transcription of pre-recorded audio.
- It accepts files up to 12 hours and 2 GB, handles single-file and batch jobs, and recognizes Chinese (Mandarin plus many regional dialects such as Cantonese, Wu, and Hokkien), English, Japanese, Korean, and dozens of other languages.
- The official docs highlight hotword customization for domain terminology and speaker diarization for multi-speaker recordings.
- Synthorai serves Fun-ASR through its OpenAI-compatible endpoint, so existing transcription clients work without modification.
Specs & limits
| Modalities | audio → text |
| Features | batch · diarization |
| Audio limits | Async file transcription up to 12h / 2GB; hotwords + speaker diarization; sentence/word timestamps; 30+ languages incl. Chinese dialects |
| Notable | Singing recognition added 2025-12; open-sourced Fun-ASR-Nano is a distinct model from these served weights. |
FAQ
Is the Fun-ASR API free to try?
Yes: new accounts get 10 trial calls and up to $1 in free credit, no card required. That's enough to try Fun-ASR against your real workload before adding a payment method.
What is Fun-ASR best at?
Accepts files up to 12 hours, plus hotword customization for domain terminology and speaker diarization for multi-speaker recordings. See the About section for the full picture from the vendor's own release notes.
How much does Fun-ASR cost?
Fun-ASR costs $0.0021 per minute of audio transcribed on Synthorai: pay-as-you-go, no platform markup, no subscription.
Which languages does Fun-ASR support?
Fun-ASR supports 30+ languages incl. Chinese dialects. On Synthorai you call it through POST /v1/audio/transcriptions, the OpenAI transcription API shape.
How do I get access to Fun-ASR?
Point your existing OpenAI SDK at base_url="https://synthorai.io/v1", set model="fun-asr", and you're done. One API key covers every model on the gateway.