GPT-4.1 vs Qwen3.5-Plus

GPT-4.1 and Qwen3.5-Plus come from different camps — OpenAI versus Alibaba — and they split most sharply on price and context. GPT-4.1 runs at $2.00/$8.00 per 1M tokens with a 1M window; Qwen3.5-Plus sits at $0.40/$2.40 with 1M of context. Neither is objectively "better" — the right pick depends on what you're shipping.

In practice: The best value GPT model with a massive 1M context window. Ideal for long documents and codebases. Versatile model with 1M context. The best value in the Qwen lineup for most use cases. Both ship through AI API Hub on an OpenAI-compatible endpoint, so you can move between them by changing a single model name — and settle the bill with USDT or USDC, no credit card required.

On cost alone, Qwen3.5-Plus is the cheaper of the two (Save $1.60 per 1M input), which adds up fast once real traffic hits. Use the calculator below to model your own volume.

→If you are building a coding-heavy AI agent → Qwen3.5-Plus is preferred.

→If your workload involves long document reasoning or multi-step instruction following → GPT-4.1 performs better with its 1M context.

→If cost is your primary constraint → Qwen3.5-Plus provides ~80% lower cost per 1M tokens.

→If you need function-calling AI agents → GPT-4.1 is the only option with tool use support.

On performance, GPT-4.1 leans into 1m context window and pairs it with 1M of context — enough for 1m context window and strong coding. Qwen3.5-Plus answers with 1m context across 1M, which makes it the stronger fit when you need 1m context and best value. The gap is real, but it's a question of fit rather than dominance.

Pricing is where they part ways. At $2.00/$8.00 versus $0.40/$2.40 per 1M tokens, Qwen3.5-Plus is the clear budget pick. Run a typical workload of 1M requests/month at ~1K input / 500 output tokens and Qwen3.5-Plus keeps roughly $4400.00/month in your pocket.

Our take: if cost efficiency drives the decision, Qwen3.5-Plus wins. Either way, both run through AI API Hub with USDT/USDC payments and instant activation — start with $5 and one API key covers every model.

Since both GPT-4.1 and Qwen3.5-Plus are available through AI API Hub with OpenAI-compatible API format, switching between them requires only changing the model name parameter. Your existing SDK code works without modification.

from openai import OpenAI
client = OpenAI(api_key="YOUR_KEY", base_url="https://api.apiyihe.org/v1")
# Before: response = client.chat.completions.create(model="gpt-4.1", messages=[...])
# After:  response = client.chat.completions.create(model="qwen3.5-plus", messages=[...])

import OpenAI from "openai";
const client = new OpenAI({apiKey: process.env.KEY, baseURL: "https://api.apiyihe.org/v1"});
// Before: model: "gpt-4.1"
// After:  model: "qwen3.5-plus"

curl https://api.apiyihe.org/v1/chat/completions \
  -H "Authorization: Bearer YOUR_KEY" \
  -d '{"model": "qwen3.5-plus", "messages": [{"role":"user","content":"Hello"}]}'

💡 AI API Hub supports both models through one API key. No separate accounts needed. Pay with USDT/USDC for all models.