Comparing 2 models

Claude Sonnet 4.5 vs Kimi K3

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

metric

Model 1Claude Sonnet 4.5

Model 2Kimi K3

Best for

Tool & Function Calling (#2)

Code Completion (#1)

Provider

anthropic

moonshotai

Context

1.0MBest

Input / 1M

$3Best

Output / 1M

$15Best

Tool use

yesBest

Vision

yesBest

Reasoning

yesBest

Open-weight

—

yesBest

Released

Jan 15, 2025

Jul 16, 2026

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 Document Summarization —#2Best

Best LLM for High-Volume Extraction —#1Best

Best LLM for Grounded RAG —#4Best

Cheapest Capable LLM —#2Best

Best LLM for Roleplay & Character —#4Best

Best LLM for Translation —#2Best

Best LLM for JSON & Schema Output #7 #1Best

Best LLM for Agentic Coding —#8Best

Best LLM for Logic & Problem Solving —#4Best

Best LLM for Everyday Translation —#2Best

Best LLM for Code Completion —#1Best

Best LLM for AI Agents #6Best #10

Best LLM for Literary Translation —#2Best

Best LLM for Debugging & Code Review —#7Best

Best Open-Weight LLM for Self-Hosting —#5Best

Best LLM for Autonomous Agents —#8Best

Best Local LLM for Coding —#5Best

Best LLM for Massive Context —#5Best

Best LLM for Fast Summaries —#1Best

Best LLM for a General Assistant —#2Best

Best LLM for Coding —#4Best

Best LLM for Writing —#3Best

Best LLM for Structured Data Extraction #7Best —

Best LLM for RAG & Long Context —#3Best

Best LLM for Tool & Function Calling #2Best —

Best LLM for Frontend & UI —#1Best