Qwen 3 4B vs Qwen 2.5 VL 7B

Compare Qwen 3 4B and Qwen 2.5 VL 7B: pricing, performance, context window, latency, and best use cases. Side-by-side comparison on XALEN.

Updated 2026-05-21 · By Abhishek Raj · Our methodology

All Alibaba models All Alibaba models What is an LLM API? Python Quickstart What is inference?
Feature Qwen 3 4B Qwen 2.5 VL 7B
CategoryCompactVision
Parameters4B7B
Context Window128K128K
Input Price$0.006/1M tokens$0.01/1M tokens
Output Price$0.012/1M tokens$0.02/1M tokens
Latency~50ms~150ms

Choose Qwen 3 4B when:

  • ✓ Mobile apps
  • ✓ Intent detection
  • ✓ Preprocessing
Key Strengths:

Ultra-compact, Mobile-ready, Low cost

Choose Qwen 2.5 VL 7B when:

  • ✓ Budget image analysis
  • ✓ Simple OCR
  • ✓ Quick visual Q&A
Key Strengths:

Low cost vision, Asian language OCR, Fast

Verdict: Qwen 3 4B vs Qwen 2.5 VL 7B

For cost efficiency, Qwen 3 4B wins at $0.006/1M input tokens. For speed, Qwen 2.5 VL 7B is faster at ~150ms. Qwen 3 4B excels at Mobile apps while Qwen 2.5 VL 7B is better for Budget image analysis. Both are available on XALEN through a single API — try them in the Playground to see which fits your workload.

Detailed Analysis

Pricing Comparison

Qwen 3 4B costs $0.006/1M input tokens and $0.012/1M output tokens. Qwen 2.5 VL 7B costs $0.01 input and $0.02 output. Qwen 3 4B is 1.7x cheaper on input tokens. XALEN offers batch processing at 50% discount on both models.

Performance & Context

Qwen 3 4B has a 128K context window with ~50ms latency. Qwen 2.5 VL 7B offers 128K context at ~150ms. Both have identical context windows.

Best For

Qwen 3 4B (Compact) is optimized for: Mobile apps, Intent detection, Preprocessing. Qwen 2.5 VL 7B (Vision) works best for: Budget image analysis, Simple OCR, Quick visual Q&A.

Try Both on XALEN

Both models are available through XALEN's OpenAI-compatible API. Switch between them by changing the model parameter:

from xalen import XALEN

client = XALEN(api_key="xln_test_YOUR_KEY")

# Use Qwen 3 4B
response_a = client.chat.completions.create(
    model="qwen-3-4b",
    messages=[{"role": "user", "content": "Your question here"}]
)

# Use Qwen 2.5 VL 7B
response_b = client.chat.completions.create(
    model="qwen-2-5-vl-7b",
    messages=[{"role": "user", "content": "Your question here"}]
)

Start Building with XALEN

200+ AI models. One API. Pay-as-you-go.

Get API Key Try in Playground

Frequently Asked Questions

Which is better, Qwen 3 4B or Qwen 2.5 VL 7B?

Qwen 3 4B (Compact, 4B) offers Ultra-compact. Qwen 2.5 VL 7B (Vision, 7B) offers Low cost vision. Choose Qwen 3 4B for Mobile apps or Qwen 2.5 VL 7B for Budget image analysis.

How much does Qwen 3 4B cost vs Qwen 2.5 VL 7B?

Qwen 3 4B: $0.006/1M input, $0.012/1M output. Qwen 2.5 VL 7B: $0.01/1M input, $0.02/1M output. Both available on XALEN with batch processing at 50% discount.

Can I use both models on XALEN?

Yes. XALEN provides 200+ models through a single OpenAI-compatible API. Switch between Qwen 3 4B and Qwen 2.5 VL 7B by changing the model parameter. No code changes needed.

Related Comparisons

Qwen 3 4B vs Vedika Vision Qwen 3 4B vs GPT-4.1 Nano Qwen 3 4B vs GPT-4o Mini Qwen 3 4B vs Claude Haiku 3.5 Qwen 3 4B vs Gemma 3 12B Qwen 3 4B vs Gemma 3 4B

Last updated: 2026-05-21. Pricing and specifications may change. Check pricing page for latest rates.