# OpenAI reports GPT-6 Luna at 66.6% on DeepSWE v1.1

OpenAI reports that GPT-6 Luna scores 66.6% on DeepSWE v1.1, comparable to Claude Opus 5 and Fable 5 at medium effort for 93-96% less per task, and matches GPT-5.6 Sol on factuality at higher effort for about 1/100th the cost.

Language: en
Time zone: America/Los_Angeles
Current time (UTC, cached as of): 2026-11-10T06:47:00.000Z
Query date (America/Los_Angeles): 2026-11-09

HTML: https://didcodexreset.com/news/1e430fd20bc741b1b7f7324b.html

Content language: en
Localization state: sameLanguage

Source: OpenRouter · Published 9/22/2026, 11:32:25

GPT-6 Luna is the fast, low-cost tier. OpenAI reports that it scores 66.6% on DeepSWE v1.1, comparable to Claude Opus 5 and Fable 5 at medium effort for 93-96% less per task.

At higher effort, OpenAI reports that GPT-6 Luna matches GPT-5.6 Sol on factuality at about 1/100th the cost. It is available on [OpenRouter](https://openrouter.ai/openai/gpt-6-luna).

Tags: GPT-6 Luna, OpenAI, OpenRouter, DeepSWE, Benchmarks

[View original post](https://x.com/OpenRouter/status/2102463864017453164)