qwen/qwen3.5-plus-20260420 API — Pricing & Access

Pricing

Qwen3.5 Plus 20260420 pricing

Billed per token. 1,000 output tokens = 1 second of video ($0.00/s at this list price).

Direction	Price per 1M tokens
Input	$0.32
Output	$1.89
Per second of video	$0.00 (1,000 output tokens)

Availability

Served by 1 provider

Requests route to OpenRouter by default (cheapest). Pin a specific provider with the :provider suffix.

Provider	Upstream model ID
openrouter	`qwen/qwen3.5-plus-20260420`

Quickstart

Call Qwen3.5 Plus 20260420 in 30 seconds

Same FastInfra API key and base URL. POST /videos/generations (HTTP 202), then poll GET /videos/jobs/{id} — not chat completions.

Python

import base64, json, time, urllib.request

headers = {"Authorization": "Bearer YOUR_API_KEY", "Content-Type": "application/json"}
req = urllib.request.Request(
    "https://api.fastinfra.ai/v1/videos/generations",
    data=json.dumps({
        "model": "qwen/qwen3.5-plus-20260420",
        "prompt": "A woman looks at the camera and says, welcome to FastInfra.",
        "seconds": 5,
        "size": "1280x704"
    }).encode(),
    headers=headers,
    method="POST",
)
with urllib.request.urlopen(req, timeout=60) as resp:
    job = json.load(resp)

while True:
    time.sleep(2)
    poll = urllib.request.Request(
        f"https://api.fastinfra.ai/v1/videos/jobs/{job['id']}",
        headers={"Authorization": "Bearer YOUR_API_KEY"},
    )
    with urllib.request.urlopen(poll, timeout=60) as resp:
        payload = json.load(resp)
    if payload["status"] == "completed":
        break
    if payload["status"] == "failed":
        raise SystemExit(payload.get("error") or "video job failed")

open("clip.mp4", "wb").write(base64.b64decode(payload["data"][0]["b64_json"]))

curl

curl https://api.fastinfra.ai/v1/videos/generations \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "qwen/qwen3.5-plus-20260420",
    "prompt": "A woman looks at the camera and says, welcome to FastInfra.",
    "seconds": 5,
    "size": "1280x704"
  }'
# HTTP 202 — copy "id", then poll:
curl https://api.fastinfra.ai/v1/videos/jobs/JOB_ID \
  -H "Authorization: Bearer YOUR_API_KEY"

FAQ

Qwen3.5 Plus 20260420 — common questions

How much does the qwen/qwen3.5-plus-20260420 API cost?

On FastInfra, qwen/qwen3.5-plus-20260420 costs $0.315/1M input, $1.89/1M output tokens ($0 per second of video). Billing is per token used, with no subscription.

Is qwen/qwen3.5-plus-20260420 compatible with the OpenAI SDK?

Video models use the same FastInfra API key and base URL (https://api.fastinfra.ai/v1). POST https://api.fastinfra.ai/v1/videos/generations returns HTTP 202 with a job id; poll GET https://api.fastinfra.ai/v1/videos/jobs/{id} until status is completed.

Which providers serve qwen/qwen3.5-plus-20260420?

qwen/qwen3.5-plus-20260420 is available from 1 provider(s): openrouter. Requests route to OpenRouter by default (cheapest); append ":provider" to the model ID to pin one.

Alternatives

Qwen2.5:0.5b qwen2.5:0.5b Free tier Qwen2.5:1.5b qwen2.5:1.5b Free tier Qwen2.5:3b qwen2.5:3b Free tier Qwen3 Embedding 0.6B Qwen/Qwen3-Embedding-0.6B $0.01 input · — output / 1M tokens Qwen3 Embedding 8B Qwen/Qwen3-Embedding-8B $0.01 input · — output / 1M tokens Qwen3 Embedding 4B Qwen/Qwen3-Embedding-4B $0.02 input · — output / 1M tokens

Qwen3.5 Plus 20260420 API