Yi Lightning vs Phi-3.5 Mini
Compare Yi Lightning and Phi-3.5 Mini: pricing, performance, context window, latency, and best use cases. Side-by-side comparison on XALEN.
Updated 2026-05-21 · By Abhishek Raj · Our methodology
| Feature | Yi Lightning | Phi-3.5 Mini |
|---|---|---|
| Category | Open Source | Compact |
| Parameters | 200B MoE | 3.8B |
| Context Window | 128K | 128K |
| Input Price | $0.04/1M tokens | $0.005/1M tokens |
| Output Price | $0.08/1M tokens | $0.01/1M tokens |
| Latency | ~300ms | ~50ms |
Choose Yi Lightning when:
- ✓ High-volume APIs
- ✓ Fast Q&A
- ✓ Real-time chatbots
Fast inference, Good multilingual, Strong reasoning
Choose Phi-3.5 Mini when:
- ✓ Simple Q&A
- ✓ Classification
- ✓ Edge inference
128K context in tiny model, Ultra-low cost, Fast
Verdict: Yi Lightning vs Phi-3.5 Mini
For cost efficiency, Phi-3.5 Mini wins at $0.005/1M input tokens. For speed, Yi Lightning is faster at ~300ms. Yi Lightning excels at High-volume APIs while Phi-3.5 Mini is better for Simple Q&A. Both are available on XALEN through a single API — try them in the Playground to see which fits your workload.
Detailed Analysis
Pricing Comparison
Yi Lightning costs $0.04/1M input tokens and $0.08/1M output tokens. Phi-3.5 Mini costs $0.005 input and $0.01 output. Phi-3.5 Mini is 8.0x cheaper on input tokens. XALEN offers batch processing at 50% discount on both models.
Performance & Context
Yi Lightning has a 128K context window with ~300ms latency. Phi-3.5 Mini offers 128K context at ~50ms. Both have identical context windows.
Best For
Yi Lightning (Open Source) is optimized for: High-volume APIs, Fast Q&A, Real-time chatbots. Phi-3.5 Mini (Compact) works best for: Simple Q&A, Classification, Edge inference.
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 Yi Lightning
response_a = client.chat.completions.create(
model="yi-lightning",
messages=[{"role": "user", "content": "Your question here"}]
)
# Use Phi-3.5 Mini
response_b = client.chat.completions.create(
model="phi-3-5-mini",
messages=[{"role": "user", "content": "Your question here"}]
)Frequently Asked Questions
Which is better, Yi Lightning or Phi-3.5 Mini?
Yi Lightning (Open Source, 200B MoE) offers Fast inference. Phi-3.5 Mini (Compact, 3.8B) offers 128K context in tiny model. Choose Yi Lightning for High-volume APIs or Phi-3.5 Mini for Simple Q&A.
How much does Yi Lightning cost vs Phi-3.5 Mini?
Yi Lightning: $0.04/1M input, $0.08/1M output. Phi-3.5 Mini: $0.005/1M input, $0.01/1M 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 Yi Lightning and Phi-3.5 Mini 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.