Comparing 2 models

Claude Opus 4.6 vs GLM 5.1

Facts first, then task-specific rankings. A highlighted cell is better only for that row, not universally.

metric

Model 1Claude Opus 4.6

Model 2GLM 5.1

Best for

Business Writing (#1)

Business Writing (#5)

Provider

anthropic

z-ai

Context

1MBest

205K

Input / 1M

$0.97Best

Output / 1M

$25

$3.04Best

Tool use

yesBest

Vision

yesBest

—

Reasoning

yesBest

Open-weight

—

yesBest

Released

Feb 5, 2026

Jan 20, 2025

task evidence

How they place when the question changes

Lower ranks are better. “Best” marks the strongest option in this shortlist for that task.

Best LLM for Creative Writing #2Best —

Best LLM for Grounded RAG #2Best —

Best LLM for Document Parsing #3Best —

Best LLM for Image Understanding #3Best —

Best LLM for Translation #1Best #5

Best LLM for OCR & Documents #3Best —

Best LLM for Massive Context #2Best —

Best LLM for Logic & Problem Solving #1Best —

Best LLM for RAG & Long Context #2Best —

Best LLM for Vision & Documents #3Best —

Best LLM for Charts & Diagrams #3Best —

Best LLM for Competition Math #1Best —

Best LLM for Literary Translation #1Best —

Best LLM for Document Summarization #1Best —

Best LLM for Math & Reasoning #2Best —

Best LLM for Chat & Roleplay #1Best —

Best LLM for JSON & Schema Output #4Best —

Best LLM for Marketing Copy #1Best —

Best LLM for Business Writing #1Best #5

Best LLM for a General Assistant #2Best —

Best LLM for Writing #1Best —

Best LLM for Computer & Browser Use #6Best —

Best LLM for Everyday Translation #2Best #6