Phi-3.5 Mini vs Baichuan 4

Compare Phi-3.5 Mini and Baichuan 4: pricing, performance, context window, latency, and best use cases. Side-by-side comparison on XALEN.

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

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Feature Phi-3.5 Mini Baichuan 4
CategoryCompactOpen Source
Parameters3.8B~130B
Context Window128K128K
Input Price$0.005/1M tokens$0.05/1M tokens
Output Price$0.01/1M tokens$0.09/1M tokens
Latency~50ms~350ms

Choose Phi-3.5 Mini when:

  • ✓ Simple Q&A
  • ✓ Classification
  • ✓ Edge inference
Key Strengths:

128K context in tiny model, Ultra-low cost, Fast

Choose Baichuan 4 when:

  • ✓ Chinese content
  • ✓ Cultural analysis
  • ✓ Bilingual apps
Key Strengths:

Strong Chinese, Cultural knowledge, Good reasoning

Verdict: Phi-3.5 Mini vs Baichuan 4

For cost efficiency, Phi-3.5 Mini wins at $0.005/1M input tokens. For speed, Baichuan 4 is faster at ~350ms. Phi-3.5 Mini excels at Simple Q&A while Baichuan 4 is better for Chinese content. Both are available on XALEN through a single API — try them in the Playground to see which fits your workload.

Detailed Analysis

Pricing Comparison

Phi-3.5 Mini costs $0.005/1M input tokens and $0.01/1M output tokens. Baichuan 4 costs $0.05 input and $0.09 output. Phi-3.5 Mini is 10.0x cheaper on input tokens. XALEN offers batch processing at 50% discount on both models.

Performance & Context

Phi-3.5 Mini has a 128K context window with ~50ms latency. Baichuan 4 offers 128K context at ~350ms. Both have identical context windows.

Best For

Phi-3.5 Mini (Compact) is optimized for: Simple Q&A, Classification, Edge inference. Baichuan 4 (Open Source) works best for: Chinese content, Cultural analysis, Bilingual apps.

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 Phi-3.5 Mini
response_a = client.chat.completions.create(
    model="phi-3-5-mini",
    messages=[{"role": "user", "content": "Your question here"}]
)

# Use Baichuan 4
response_b = client.chat.completions.create(
    model="baichuan-4",
    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, Phi-3.5 Mini or Baichuan 4?

Phi-3.5 Mini (Compact, 3.8B) offers 128K context in tiny model. Baichuan 4 (Open Source, ~130B) offers Strong Chinese. Choose Phi-3.5 Mini for Simple Q&A or Baichuan 4 for Chinese content.

How much does Phi-3.5 Mini cost vs Baichuan 4?

Phi-3.5 Mini: $0.005/1M input, $0.01/1M output. Baichuan 4: $0.05/1M input, $0.09/1M 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 Phi-3.5 Mini and Baichuan 4 by changing the model parameter. No code changes needed.

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