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GLM 5.1 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 GLM 5.1 and Yi-Lightning.

Zhipu AI

GLM 5.1

GLM-5.1 delivers a major leap in coding capability, with particularly significant gains in handling long-horizon tasks. Unlike previous models built around minute-level interactions, GLM-5.1 can work independently and continuously on...

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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

SpecificationGLM 5.1Yi-Lightning
ProviderZhipu AI01.AI
Context Window202,752 tokens131,072 tokens
Agent SuitabilityN/A82/100
Time to First Token (TTFT)N/A120 ms
Deployment Modelmanaged apimanaged api
Production Stabilitystablestable
API AvailableYesYes
Released Date2026-04-072025-10-01

API Pricing Comparison

Input Price per Million Tokens

GLM 5.1

$0.97

Yi-Lightning

$0.15

Output Price per Million Tokens

GLM 5.1

$3.04

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
8800.0%vsN/A
GLM 5.1
Yi-Lightning
HumanEvalPython coding & logic synthesis
8950.0%vsN/A
GLM 5.1
Yi-Lightning
MATHComplex mathematical problem solving
7700.0%vsN/A
GLM 5.1
Yi-Lightning
GPQAGraduate-level expert reasoning
5100.0%vsN/A
GLM 5.1
Yi-Lightning
HellaSwagCommonsense reasoning and inference
8850.0%vsN/A
GLM 5.1
Yi-Lightning
MT-BenchMulti-turn conversation flow quality
920.0%vsN/A
GLM 5.1
Yi-Lightning

GLM 5.1 Quirks & Gotchas

No developer gotchas reported.

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