GPT-4o vs Yi Lightning

Compare GPT-4o and Yi Lightning: 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 GPT-4o Yi Lightning
CategoryFrontierOpen Source
Parameters~1T200B MoE
Context Window128K128K
Input Price$0.05/1M tokens$0.04/1M tokens
Output Price$0.15/1M tokens$0.08/1M tokens
Latency~400ms~300ms

Choose GPT-4o when:

  • ✓ Chart image analysis
  • ✓ Multimodal Q&A
  • ✓ Content generation
Key Strengths:

Multimodal, Fast for frontier, Strong reasoning

Choose Yi Lightning when:

  • ✓ High-volume APIs
  • ✓ Fast Q&A
  • ✓ Real-time chatbots
Key Strengths:

Fast inference, Good multilingual, Strong reasoning

Verdict: GPT-4o vs Yi Lightning

For cost efficiency, Yi Lightning wins at $0.04/1M input tokens. For speed, Yi Lightning is faster at ~300ms. GPT-4o excels at Chart image analysis while Yi Lightning is better for High-volume APIs. Both are available on XALEN through a single API — try them in the Playground to see which fits your workload.

Detailed Analysis

Pricing Comparison

GPT-4o costs $0.05/1M input tokens and $0.15/1M output tokens. Yi Lightning costs $0.04 input and $0.08 output. Yi Lightning is 1.3x cheaper on input tokens. XALEN offers batch processing at 50% discount on both models.

Performance & Context

GPT-4o has a 128K context window with ~400ms latency. Yi Lightning offers 128K context at ~300ms. Both have identical context windows.

Best For

GPT-4o (Frontier) is optimized for: Chart image analysis, Multimodal Q&A, Content generation. Yi Lightning (Open Source) works best for: High-volume APIs, Fast Q&A, Real-time chatbots.

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 GPT-4o
response_a = client.chat.completions.create(
    model="gpt-4o",
    messages=[{"role": "user", "content": "Your question here"}]
)

# Use Yi Lightning
response_b = client.chat.completions.create(
    model="yi-lightning",
    messages=[{"role": "user", "content": "Your question here"}]
)

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Get API Key Try in Playground

Frequently Asked Questions

Which is better, GPT-4o or Yi Lightning?

GPT-4o (Frontier, ~1T) offers Multimodal. Yi Lightning (Open Source, 200B MoE) offers Fast inference. Choose GPT-4o for Chart image analysis or Yi Lightning for High-volume APIs.

How much does GPT-4o cost vs Yi Lightning?

GPT-4o: $0.05/1M input, $0.15/1M output. Yi Lightning: $0.04/1M input, $0.08/1M 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 GPT-4o and Yi Lightning 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.