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GPT-4o vs Yi-Lightning

How do these models stack up? Below is an expert side-by-side comparison of specifications, context window capacity, live pricing per million tokens, and standardized benchmark scores for GPT-4o and Yi-Lightning.

OpenAI

GPT-4o

GPT-4o ("o" for "omni") is OpenAI's latest AI model, supporting both text and image inputs with text outputs. It maintains the intelligence level of [GPT-4 Turbo](/models/openai/gpt-4-turbo) while being twice as...

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01.AI

Yi-Lightning

Yi-Lightning is 01.AI's (離一万物) fastest and most cost-efficient model, purpose-built for high-throughput production workloads. It delivers competitive performance against GPT-4o-mini and Claude Haiku at a fraction of the cost, with exceptional bilingual Chinese-English capabilities. Yi-Lightning excels at classification, entity extraction, summarization, and high-frequency API tasks where latency and cost-per-call are critical constraints.

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Technical Specifications

SpecificationGPT-4oYi-Lightning
ProviderOpenAI01.AI
Context Window128,000 tokens131,072 tokens
Agent Suitability90/10082/100
Time to First Token (TTFT)280 ms120 ms
Deployment Modelmanaged apimanaged api
Production Stabilitystablestable
API AvailableYesYes
Released Date2024-05-132025-10-01

API Pricing Comparison

Input Price per Million Tokens

GPT-4o

$2.50

Yi-Lightning

$0.15

Output Price per Million Tokens

GPT-4o

$10.00

Yi-Lightning

$0.30

Want to test both models live?

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Benchmark Performance Metrics

Scores show the raw performance percentages verified across key evaluation suites. Higher bars indicate superior accuracy and capability in that domain.

MMLUGeneral knowledge & multi-task understanding
8870.0%vsN/A
GPT-4o
Yi-Lightning
HumanEvalPython coding & logic synthesis
9020.0%vsN/A
GPT-4o
Yi-Lightning
MATHComplex mathematical problem solving
7660.0%vsN/A
GPT-4o
Yi-Lightning
GPQAGraduate-level expert reasoning
5360.0%vsN/A
GPT-4o
Yi-Lightning
HellaSwagCommonsense reasoning and inference
8870.0%vsN/A
GPT-4o
Yi-Lightning
MT-BenchMulti-turn conversation flow quality
930.0%vsN/A
GPT-4o
Yi-Lightning

GPT-4o Quirks & Gotchas

  • β–ΈStrong multimodal performance β€” best vision+tool calling combo
  • β–ΈLegacy model β€” migrate to GPT-5 for latest improvements

Yi-Lightning Quirks & Gotchas

  • β–ΈBest cost-efficiency for high-volume bilingual applications
  • β–ΈSelf-hostable via Ollama β€” excellent open-weight option for Asian-language pipelines