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Claude Opus 4.8 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 Claude Opus 4.8 and Yi-Lightning.

Anthropic

Claude Opus 4.8

Claude Opus 4.8 is Anthropic's most capable generally available model in the Opus family. It supports text, image, and file inputs with text output, with reasoning support and a 1M-token...

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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

SpecificationClaude Opus 4.8Yi-Lightning
ProviderAnthropic01.AI
Context Window1,000,000 tokens131,072 tokens
Agent Suitability97/10082/100
Time to First Token (TTFT)520 ms120 ms
Deployment Modelmanaged apimanaged api
Production Stabilitybetastable
API AvailableYesYes
Released Date2026-05-272025-10-01

API Pricing Comparison

Input Price per Million Tokens

Claude Opus 4.8

$5.00

Yi-Lightning

$0.15

Output Price per Million Tokens

Claude Opus 4.8

$25.00

Yi-Lightning

$0.30

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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
9540.0%vsN/A
Claude Opus 4.8
Yi-Lightning
HumanEvalPython coding & logic synthesis
9720.0%vsN/A
Claude Opus 4.8
Yi-Lightning
MATHComplex mathematical problem solving
9410.0%vsN/A
Claude Opus 4.8
Yi-Lightning
GPQAGraduate-level expert reasoning
8650.0%vsN/A
Claude Opus 4.8
Yi-Lightning
HellaSwagCommonsense reasoning and inference
9920.0%vsN/A
Claude Opus 4.8
Yi-Lightning
MT-BenchMulti-turn conversation flow quality
980.0%vsN/A
Claude Opus 4.8
Yi-Lightning

Claude Opus 4.8 Quirks & Gotchas

  • β–ΈBest-in-class for autonomous code repair and multi-agent orchestration
  • β–ΈPreview model β€” API may introduce breaking changes without notice

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