Qwen 3.5 27B
Access Qwen 3.5 27B through one API key. Dense model for consistent performance.
Alibaba's dense 27B model. All parameters active for consistent performance across tasks.
No credit card required. Takes 30 seconds.
2,400+
Developers
1.2M+
API calls served
100+
Endpoints
$0.01
Per call
Yep, that's it.
Try it live
Send a message and see Qwen 3.5 27B respond in real time.
Maximum tokens in the response.
Real-time tokens
Context Window
262K tokens
Max Output
66K tokens
Input Price
$0.27 / 1M tokens
Output Price
$2.18 / 1M tokens
Strengths
A 27-billion-parameter dense architecture keeps every parameter active on each token, giving uniform quality across reasoning, coding, and writing without the routing variance of mixture-of-experts designs.
Dense activation produces stable, predictable responses across diverse prompts, which suits production pipelines that need repeatable behavior over thousands of calls.
The 262,144-token context window holds large codebases, long documents, or multi-file inputs in a single request, with up to 65,536 output tokens per response.
At $0.27 per 1M input and $2.18 per 1M output tokens, it delivers dense-model quality at a fraction of frontier-tier pricing for high-volume workloads.
Quick start
Copy this snippet and start making calls with Qwen 3.5 27B.
const res = await fetch('https://api.yepapi.com/v1/ai/chat', {
method: 'POST',
headers: {
'x-api-key': 'YOUR_API_KEY',
'Content-Type': 'application/json',
},
body: JSON.stringify({
"model": "qwen/qwen3.5-27b",
"messages": [
{
"role": "user",
"content": "Explain API gateways in 2 sentences."
}
],
"maxTokens": 256
}),
});
const { data } = await res.json();
console.log(data.message.content);Why use Qwen 3.5 27B through YepAPI?
Qwen 3.5 27B API: dense 27B model with 262K context
Qwen 3.5 27B is Alibaba's dense large language model that keeps all 27 billion parameters active on every token, trading the cost savings of sparse routing for consistent, predictable output quality across tasks.
On YepAPI you reach Qwen 3.5 27B through one OpenAI-compatible endpoint, alongside dozens of other models, with a 262,144-token context window at $0.27 per 1M input and $2.18 per 1M output tokens.
What is Qwen 3.5 27B?
Qwen 3.5 27B is a dense 27-billion-parameter model from Alibaba's Qwen family. Unlike mixture-of-experts models that activate only a subset of parameters per token, a dense model uses all of them on every forward pass, which produces steadier quality across general reasoning, coding, and writing. It ships with a 262,144-token context window and up to 65,536 output tokens, so it can ingest large documents or full codebases and respond at length. The dense design makes it a dependable mid-size workhorse for teams that value consistency over the variance sometimes seen in sparse architectures.
Build with Qwen 3.5 27B via YepAPI
Call Qwen 3.5 27B through YepAPI's OpenAI-compatible /v1/ai/chat endpoint. If you already use the OpenAI SDK, point the base URL at YepAPI and set the model string to qwen-3.5-27b; no other code changes are needed. Switching to a different model later means editing that one string. The same API key also unlocks every other model on the platform plus YepAPI's SEO, SERP, and web-scraping tools, so you can run LLM calls and data collection from a single integration and one bill.
Qwen 3.5 27B API pricing — $0.27 / $2.18 per 1M tokens
Qwen 3.5 27B costs $0.27 per 1M input tokens and $2.18 per 1M output tokens on YepAPI. That keeps a dense, full-activation model in budget for sustained production traffic, where the output-heavy nature of generation tasks usually dominates spend. Because billing is usage-based and shared across every model your key can reach, you can route cheaper sub-tasks to smaller Qwen variants and reserve 27B for work that benefits from its steadier quality.
Qwen 3.5 27B for consistent production pipelines
The dense architecture makes Qwen 3.5 27B a strong fit for pipelines that run the same kind of task repeatedly and need predictable behavior: document analysis, structured extraction, code generation, and customer-facing assistants. With 262K context it can summarize long reports or reason over an entire repository in one call, and the 65,536-token output ceiling supports long-form generation. For teams that found MoE models too variable across runs, the full-activation design is the main draw.
Try Qwen 3.5 27B free
New YepAPI accounts get $5 in free credit with no card required. That is enough to test Qwen 3.5 27B on your real prompts, compare it against other Qwen sizes, and benchmark cost and quality before you commit a single dollar.
Start generating in 30 seconds
$5 free credit on signup. No credit card required. Pay per call.
What developers say
“Switched from SerpAPI and cut our SERP costs by 80%. Same data quality, way simpler billing.”
“One API key for AI models, SERP data, and web scraping. Saved us from managing 4 separate providers.”
“The $5 free credit let us prototype our entire rank tracking feature before committing. No other API does that.”
Frequently asked questions
Alibaba's dense 27B model. All parameters active for consistent performance across tasks.
Input tokens cost $0.27 per 1M tokens and output tokens cost $2.18 per 1M tokens through YepAPI. No monthly minimums — you only pay for what you use.
Sign up for a free API key, then send requests to the /v1/ai/chat endpoint.
Qwen 3.5 27B supports a 262K token context window with up to 66K output tokens per request.
Ready to use Qwen 3.5 27B?
$5 free credit on signup. No credit card required. Pay per call.
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