GPT 5.6 Luna

Every figure OnlySOTA holds for this model, one source at a time. Nothing on this page is averaged across sources.

KILLED

Identity

Developer

OpenAI

Family

GPT → GPT 5.6

Weights

closed

Released

2026-07-09

Blended Price, USD per 1M tokens (3:1 input:output)

$0.45

Sources

6 sources · 16 entries · 14 configs

Published upstream as

GPT-5.6 Lunagpt-5-6-lunaGPT 5.6 Lunagpt-5.6-luna

Where it places

• Artificial Analysis LLM Leaderboard Artificial Analysis Intelligence Index 52.3
• Arena — Agent Overall #21 0.034
• Artificial Analysis Coding Agents Artificial Analysis Coding Agent Index 0.572
• Arena — Code Overall #29 1518
• Arena — Text Overall (style control) #63 1452
• Arena — Vision Overall (style control) #38 1254

Effort ladder

• Artificial Analysis LLM Leaderboard max wins

  1. low 33.9
  2. medium 38.9
  3. high 47.0
  4. xhigh 50.1
  5. max 52.3

• Arena — Agent agent only xhigh ran

  1. xhigh 0.034

• Artificial Analysis Coding Agents Codex max wins

  1. low 0.251
  2. medium 0.420
  3. high 0.517
  4. xhigh 0.530
  5. max 0.572

• Arena — Code codex-harness only xhigh ran

  1. xhigh 1518

• Arena — Text only xhigh ran

  1. xhigh 1452

• Arena — Vision only xhigh ran

  1. xhigh 1254