Qwen3 ASR Flash API
Alibaba Qwen speech-to-text, strong on Chinese, its dialects and English, for dictation.
Qwen3 ASR Flash is a speech-to-text model from Qwen, available on OttoPort's OpenAI-compatible API as the model ID qwen3-asr-flash at $0.0000425 / second as of 2026-10-14.
Provider
Qwen
Price
$0.0000425 / second
Model ID
qwen3-asr-flash
Type
speech-to-text model
Qwen3 ASR Flash API pricing
What OttoPort bills for Qwen3 ASR Flash, and what that works out to per unit. Rates are read from the same catalog the gateway meters against, and were current on 2026-10-14.
| Per second | $0.0000425 | |
|---|---|---|
| 5-second clip | $0.000213 | |
| 8-second clip | $0.00034 | |
| Seconds per $10 | 235,294 | of generated video |
No subscription and no minimum — OttoPort bills prepaid credits against usage. See the full rate card.
Call Qwen3 ASR Flash in three lines
Send "model": "qwen3-asr-flash" to POST https://ottoport.ai/api/v1/audio/transcriptions with an OttoPort key. No Qwen account, no waitlist, no separate SDK.
curl https://ottoport.ai/api/v1/audio/transcriptions \
-H "Authorization: Bearer $OTTOPORT_API_KEY" \
-H "Content-Type: application/json" \
-d "{
\"model\": \"qwen3-asr-flash\",
\"audio\": \"$(base64 < note.m4a | tr -d '\n')\",
\"format\": \"m4a\",
\"duration\": 12
}"import base64, requests
audio = base64.b64encode(open("note.m4a", "rb").read()).decode()
result = requests.post(
"https://ottoport.ai/api/v1/audio/transcriptions",
headers={"Authorization": "Bearer " + API_KEY},
# duration is the recording's length in seconds: the billed unit.
json={"model": "qwen3-asr-flash", "audio": audio, "format": "m4a", "duration": 12},
).json()
print(result["text"])const audio = (await fs.promises.readFile("note.m4a")).toString("base64");
const res = await fetch("https://ottoport.ai/api/v1/audio/transcriptions", {
method: "POST",
headers: {
Authorization: `Bearer ${API_KEY}`,
"Content-Type": "application/json",
},
// duration is the recording's length in seconds: the billed unit.
body: JSON.stringify({ model: "qwen3-asr-flash", audio, format: "m4a", duration: 12 }),
});
const { text } = await res.json();Before you start
- 1. Create a key at /api-keys.
- 2. Top up credits — the smallest pack is $25.
- 3. Paste the request. It returns on the same request.
Full reference at /docs, or drive it from an agent with the MCP server and CLI.
Request parameters
The body POST https://ottoport.ai/api/v1/audio/transcriptions accepts for Qwen3 ASR Flash.
| Field | Type | Required | Notes |
|---|---|---|---|
| model | string | Yes | Always qwen3-asr-flash for Qwen3 ASR Flash. |
| audio | string | Yes | The recording, base64 or a base64 `data:` URL. Up to 25 MB decoded. |
| format | string | Yes | webm, m4a, mp4, mp3, wav or ogg. Read from a `data:` URL's type when omitted. |
| duration | number | Yes | The recording's length in seconds, up to 600. Rounded up to a whole second, it is the billed unit. |
| language | string | No | ISO 639-1 code of the spoken language, e.g. `en` or `zh`. |
| prompt | string | No | Names, jargon or preceding text, to steer spelling and style. |
Qwen3 ASR Flash direct vs through OttoPort
Qwen3 ASR Flash is the same model either way — what changes is how many accounts, keys, and integrations you carry to reach it.
| Qwen direct | Via OttoPort | |
|---|---|---|
| Accounts and keys | A Qwen account, plus one more for every other model you add | One OttoPort account and one key for the whole catalog |
| Request shape | Qwen's own SDK and response format | OpenAI-compatible — point baseURL at OttoPort and change the model string |
| Switching models | A new integration per provider | Replace qwen3-asr-flash with any other model ID in the catalog |
| Billing | A separate invoice and contract per provider | Prepaid credits, no subscription, one usage ledger |
| Provider outages | Your call fails | Configured backup routes are tried in order on provider failure |
Send the recording's length as `duration`.
Name the language when you know it.
Put names and jargon in `prompt`.
Qwen3 ASR Flash API questions
Cost, keys, and model IDs for Qwen3 ASR Flash on OttoPort.
How much does the Qwen3 ASR Flash API cost?
On OttoPort, Qwen3 ASR Flash costs $0.0000425 / second as of 2026-10-14. For scale, 5-second clip: $0.000213. Billing is prepaid usage with no subscription and no minimum, and the current rate is always published at ottoport.ai/pricing.
How do I get a Qwen3 ASR Flash API key?
You do not need a Qwen key. Create an OttoPort account, generate a key at ottoport.ai/api-keys, and send it as "Authorization: Bearer <key>" to POST https://ottoport.ai/api/v1/audio/transcriptions with "model": "qwen3-asr-flash". The same key reaches every other model in the catalog.
What is the model ID for Qwen3 ASR Flash?
The OttoPort model ID for Qwen3 ASR Flash is qwen3-asr-flash. Pass it as the model field on POST https://ottoport.ai/api/v1/audio/transcriptions, or list it programmatically from GET https://ottoport.ai/api/v1/models.
Do I need a Qwen account to use Qwen3 ASR Flash?
No. OttoPort connects to Qwen on your behalf, so one OttoPort account covers Qwen3 ASR Flash and every other model in the catalog — no per-provider contracts, keys, or invoices.
Other speech-to-text models on the same API
Same endpoint, same key — swapping model is a one-string change from qwen3-asr-flash.
Browse the full catalog — every model with its provider and per-unit price.