llm-api-adapter-qwen

Official Model Studio Frankfurt/Global support for Qwen in llm-api-adapter. The package uses the Anthropic-compatible Messages API directly.

Installation

Install through the Core package extra:

pip install "llm-api-adapter[qwen]"

Direct installation is also supported when Core is managed separately:

pip install llm-api-adapter-qwen

Async requests need HTTPX:

pip install "llm-api-adapter[qwen,async]"

Synchronous requests use requests by default. To opt into HTTPX for sync chat() and stream_chat(), install "llm-api-adapter[qwen,httpx]" and pass transport="httpx".

Quick start

import os

from llm_api_adapter.models.messages.chat_message import UserMessage
from llm_api_adapter.universal_adapter import UniversalLLMAPIAdapter

adapter = UniversalLLMAPIAdapter(
    organization="qwen",
    model="qwen3.8-max",
    api_key=os.environ["QWEN_API_KEY"],
)

response = adapter.chat(
    messages=[UserMessage("Explain retrieval-augmented generation.")],
    max_tokens=128,
    workspace_id=os.environ["QWEN_WORKSPACE_ID"],
)
print(response.content)

Qwen 0.1.0 supports only Model Studio's Frankfurt Global deployment. Pass the required workspace_id explicitly to every chat, stream_chat, achat, and astream_chat call; it is never read from an environment variable. The package uses:

https://{workspace_id}.eu-central-1.maas.aliyuncs.com/apps/anthropic/v1/messages

Supported models and capabilities

The package deliberately exposes fixed model IDs, not moving aliases: qwen3.8-max, qwen3.8-flash, qwen3.7-plus, and qwen3.7-flash.

All four models default to hybrid thinking. Set reasoning_level="none" to disable thinking, or capture_reasoning=True to receive provider-emitted reasoning separately from visible text. max_tokens must be a positive integer and limits generated output; it is separate from Qwen 3.7's thinking budget. With thinking enabled, Model Studio's reported usage.output_tokens can also include thinking tokens, so it can exceed max_tokens even when the visible answer respects that output limit.

Cost fields use Frankfurt Global standard USD text rates. They exclude cached, batch, promotional, and negotiated pricing.

Qwen permits tool_choice="auto" and "none" in thinking mode, but not a forced "any" or named tool. For a forced tool call, the adapter automatically disables thinking and issues a UserWarning; pass reasoning_level="none" to make that choice explicit without a warning.

PDF input

Qwen 0.1.0 supports images, but not PDFs. DocumentPart URLs and bytes are rejected before any HTTP request:

Qwen does not support DocumentPart; PDF and OCR are unavailable in Qwen 0.1.0.

The package does not make a partial PDF/OCR request or upload document bytes.

See the main llm-api-adapter README for the shared API contract and examples.