Comparing 2 models

GPT-5.6 Luna vs Grok 4.6

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

metric

Model 1GPT-5.6 Luna

Model 2Grok 4.6

Best for

Code Completion (#1)

Document Summarization (#1)

Provider

openai

x-ai

Context

1.1MBest

500K

Input / 1M

$0.20Best

Output / 1M

$1.20Best

Tool use

yesBest

Vision

yesBest

Reasoning

yesBest

Open-weight

—

Released

Jul 9, 2026

Aug 10, 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 Writing —#6Best

Best LLM for Translation —#6Best

Best LLM for AI Agents #5Best —

Cheapest Capable LLM —#4Best

Best LLM for Image Understanding #6Best —

Best LLM for High-Volume Extraction #3Best —

Best LLM for Hermes Agent #4Best —

Best LLM for Goose #4Best —

Best LLM for Document Summarization —#1Best

Best LLM for Computer & Browser Use —#4Best

Best LLM for Structured Data Extraction #1Best —

Best LLM for OCR & Documents #5Best —

Best LLM for Business Writing —#5Best

Best LLM for Literary Translation —#5Best

Best LLM for Code Completion #1Best #6

Best LLM for a General Assistant —#8Best

Best LLM for Massive Context #2Best —

Best LLM for Autonomous Agents #5Best —

Best LLM for Agentic Coding #4Best —

Best Value LLM —#3Best

Best LLM for JSON & Schema Output #1Best —

Best LLM for Summarization —#6Best

Best LLM for Logic & Problem Solving #8Best —

Best LLM for OpenClaw #3Best —

Best LLM for Competition Math #4Best #7

Best LLM for Math & Reasoning —#6Best

Best Cheap LLM for High Volume #4Best —