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GPT-5.6 Luna

Name: GPT-5.6 Luna
Author: OpenAI

Ranked on the boards below.

Overall rank

Podium score

Board wins

Jul 9, 2026

Released

·Chat ·Reasoning ·Coding ·Vision 4Usage

Chat

Which model people prefer in blind head-to-head conversations.

Text Arena

1,452 · of 100

as “gpt-5.6-luna-xhigh”

Reasoning

Hard questions with checkable answers: science, math, puzzles, expert exams.

GPQA Diamond

91.6% · of 100

as “gpt-5.6-luna_max”

as “GPT-5.6 Luna 2026-07-30 (Max)”

LiveBench

73.6% · of 59

as “gpt-5.6-luna-max”

Coding

Fixing real repositories, building web apps, editing code.

WebDev Arena

1,519 · of 100

as “gpt-5.6-luna-xhigh (codex-harness)”

Vision

Understanding images, charts and documents.

Document Arena

1,457 · of 38

as “gpt-5.6-luna-xhigh”

Vision Arena

1,258 · of 100

as “gpt-5.6-luna-xhigh”

Usage

What developers actually send tokens to.

OpenRouter

8.7T tok · of 19

as “openai/gpt-5.6-luna-20260709”

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Scores as published by each board on the capture date. Model names and logos belong to their owners; logos via logo.dev.