Qwen 3.5 Flash API

Alibaba's Qwen 3.5 Flash, through an OpenAI-compatible API. Providers quote it on an open exchange, and each request goes to the offer with the lowest estimated charge that meets your rules.

Providers compete for each request. The exchange ranks the offers that meet your rules by estimated charge. It fixes your maximum charge before the first token, and you pay for the tokens that the model uses.
The OpenAI and Anthropic APIs. Use the OpenAI or Anthropic SDK that you have. Set the base URL and your key, and send qwen3.5-flash as the model.
Your data rules. Send x-liquid-retention: none and only offers whose provider does not keep your content compete for the request.

Facts

Model name: qwen3.5-flash
Maker: Alibaba
Context window: 995.9K tokens
Input price: $0.090 per million tokens
Output price: $0.368 per million tokens
Providers: 1 independent provider
Regions: global

Providers

EmpirioLabs AI: global, $0.090 input and $0.368 output per million tokens, $0.090 cache read per million tokens, 995.9K tokens of context

Scores

HLE: 7.6, #173 of 273
GPQA: 74.2, #137 of 250
AA-LCR: 52.0, #157 of 237
Terminal-Bench Hard: 8.3, #121 of 166
τ²-Bench: 84.5, #54 of 169
IFBench: 38.0, #132 of 178
SimpleQA Verified: 20.3, #93 of 126

Scores: Artificial Analysis (https://artificialanalysis.ai/)

Scores: Epoch AI, 'Capabilities & Benchmarking' (https://epoch.ai/benchmarks)

Request

curl https://router.inference.ai.exchange/v1/chat/completions \
  -H "Authorization: Bearer $LIQUID_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "qwen3.5-flash",
    "messages": [{"role":"user","content":"Say hello."}]
  }'

Questions

What is Qwen 3.5 Flash?: Served by intent-router: each job goes to the cheapest healthy upstream for this model.
How much does Qwen 3.5 Flash cost?: Offers now ask $0.090 per million input tokens and $0.368 per million output tokens. A job pays for the tokens it uses. The exchange picks the cheapest eligible offer.
What is the context length of Qwen 3.5 Flash?: The largest offer takes 995,904 input tokens. One job can generate up to 32,768 tokens. A smaller offer can take less. The exchange skips an offer that cannot take your message.
What can Qwen 3.5 Flash do?: Its providers list Vision, Video input, Reasoning budget, JSON object, Log probabilities, Presence penalty, Repetition penalty, Seed, Top-k sampling, Top-p sampling, Text, Tools.
What inputs and outputs does Qwen 3.5 Flash support?: Text · Images · Video → Text.
Which providers serve Qwen 3.5 Flash?: 1 independent provider quote it now, with 1 offer. The table above ranks them by the cost of a typical job.
How do I call Qwen 3.5 Flash?: Send "qwen3.5-flash" as the model in an OpenAI or Anthropic request. The API section links to setup steps for each client.
When was Qwen 3.5 Flash listed?: The exchange first listed it on 10/8/2026. This is not its release date.