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GPT-4o-mini 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-mini and Yi-Lightning.

OpenAI

GPT-4o-mini

GPT-4o mini is OpenAI's newest model after [GPT-4 Omni](/models/openai/gpt-4o), supporting both text and image inputs with text outputs. As their most advanced small model, it is many multiples more affordable...

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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-4o-miniYi-Lightning
ProviderOpenAI01.AI
Context Window128,000 tokens131,072 tokens
Agent Suitability82/10082/100
Time to First Token (TTFT)150 ms120 ms
Deployment Modelmanaged apimanaged api
Production Stabilitystablestable
API AvailableYesYes
Released Date2024-07-182025-10-01

API Pricing Comparison

Input Price per Million Tokens

GPT-4o-mini

$0.15

Yi-Lightning

$0.15

Output Price per Million Tokens

GPT-4o-mini

$0.60

Yi-Lightning

$0.30

Want to test both models live?

Run side-by-side prompt prompts in our dynamic Sandbox. Check execution speeds, latency metrics, and compute actual costs in real-time.

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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
8200.0%vsN/A
GPT-4o-mini
Yi-Lightning
HumanEvalPython coding & logic synthesis
8400.0%vsN/A
GPT-4o-mini
Yi-Lightning
MATHComplex mathematical problem solving
7020.0%vsN/A
GPT-4o-mini
Yi-Lightning
GPQAGraduate-level expert reasoning
4500.0%vsN/A
GPT-4o-mini
Yi-Lightning
HellaSwagCommonsense reasoning and inference
8470.0%vsN/A
GPT-4o-mini
Yi-Lightning
MT-BenchMulti-turn conversation flow quality
860.0%vsN/A
GPT-4o-mini
Yi-Lightning

GPT-4o-mini Quirks & Gotchas

  • β–ΈUltra-low latency β€” best TTFT in the OpenAI lineup
  • β–ΈTool calling limited to single-step β€” not suitable for complex agentic pipelines

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