Chirp 2
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. Official Speech-to-Text V2 model id is chirp_2 (underscore); GA, with regional GA expansion (us-central1/europe-west4/asia-southeast1) on 2025-01-27; billed per audio.
Use Chirp 2 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="chirp-2",
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: "chirp-2",
file: fs.createReadStream("meeting.mp3"),
});
console.log(resp.text);curl https://synthorai.io/v1/audio/transcriptions \
-H "Authorization: Bearer sk-syn-..." \
-F model="chirp-2" \
-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: "chirp-2",
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("chirp-2")
.file(Paths.get("meeting.mp3"))
.build()).asTranscription();
System.out.println(resp.text());About Chirp 2
Chirp 2 is Google Cloud's multilingual automatic speech recognition model, served through the Speech-to-Text v2 API.
- Google positions it as improving on the original Chirp in both accuracy and speed while adding word-level timestamps, model adaptation (phrase biasing), and speech translation.
- It offers automatic punctuation and capitalization, language-agnostic transcription with automatic language detection, and profanity filtering, and supports streaming, synchronous, and batch recognition for audio from under a minute up to eight hours.
- Synthorai serves Chirp 2 transcription through its OpenAI-compatible audio endpoint.
Specs & limits
| Modalities | audio → text |
| Features | streaming · batch |
| Audio limits | Auto-detected audio decoding; sync Recognize <1 min, BatchRecognize 1 min-8 hrs, StreamingRecognize for real-time; optional word-level timestamps; no diarization or language detection; speech translation supported |
| Notable | Official Speech-to-Text V2 model id is chirp_2 (underscore); GA, with regional GA expansion (us-central1/europe-west4/asia-southeast1) on 2025-01-27; billed per audio. |
FAQ
Is the Chirp 2 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 Chirp 2 against your real workload before adding a payment method.
What is Chirp 2 best at?
Improved accuracy and speed over its predecessor, plus word-level timestamps and speech translation and audio from under a minute to eight hours. See the About section for the full picture from the vendor's own release notes.
How much does Chirp 2 cost?
Chirp 2 costs $0.016 per minute of audio transcribed on Synthorai: pay-as-you-go, no platform markup, no subscription.
Which languages does Chirp 2 support?
Chirp 2 supports no diarization or language detection. On Synthorai you call it through POST /v1/audio/transcriptions, the OpenAI transcription API shape.
How do I get access to Chirp 2?
Point your existing OpenAI SDK at base_url="https://synthorai.io/v1", set model="chirp-2", and you're done. One API key covers every model on the gateway.