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OpenAILaunchMateriality 5

OpenAI introduces GPT-6 Sol and Luna models

OpenAI announced GPT-6 Sol and Luna, two models that bring frontier intelligence to everyday work with different balances of capability and cost.

First seen 22 Sep, 18:00 UTC on openai.com20 sourcesLast update 23d ago

How GPT-6 Sol compares

List prices per million tokens, context and Arena's text leaderboard, against OpenAI's other top models and the leading labs' best. The percentages are GPT-6 Sol's price against each.

ModelReleasedInputOutputContextArena
GPT-6 SolSeptember 2026$2.00$10.001.05M#57 1456
GPT-6 LunaSeptember 2026$0.10 +1900%$0.50 +1900%1.05Mnot ranked yet
GPT-6 AstraSeptember 2026$10.00 -80%$50.00 -80%1.05M#30 1475
Claude Opus 5.5September 2026$4.00 -50%$20.00 -50%1M#2 1507
Gemini 4 ArgonOctober 2026$2.00$10.001M#1 1525
Muse WonderOctober 2026$4.00 -50%$20.00 -50%1Mnot ranked yet

Arena ranks the best effort setting of each model among all models on its text leaderboard. Every model and price.

What the sources say

Linked, never rewritten. Official means the lab itself.

Official5

openai.com· 22 Sep, 18:00Introducing GPT-6 Sol and LunaAWS Machine Learning blog· 22 Sep, 18:10Bring more intelligence to everyday work with GPT-6 Sol and GPT-6 Luna on Amazon BedrockUsage-limit resets by lab staff on X (via claude-resets.com)· 22 Sep, 18:23Codex and ChatGPT Work usage limits reset: GPT-6 Sol and Luna are out. Not only are they a very significant improvement across the board, but also in writing and general "you know when you try it" quality. We are also permanently reducing the API price by 50% making both of them…openai.com· 22 Sep, 21:00Better prompt caching for GPT-6openai.com· 23 Sep, 01:00Airbnb widens access to GPT-6 Astra and OpenAI frontier models

Press6

TechCrunch· 22 Sep, 18:00OpenAI launches GPT-6 Sol and Luna, boasting lower cost and fewer mistakesOpenRouter· 22 Sep, 18:12OpenAI: GPT-6 Sol listed on OpenRouterOpenRouter· 22 Sep, 18:13OpenAI: GPT-6 Sol Pro listed on OpenRouterOpenRouter· 22 Sep, 18:13OpenAI: GPT-6 Luna listed on OpenRouterOpenRouter· 22 Sep, 18:13OpenAI: GPT-6 Luna Pro listed on OpenRouterThe Decoder· 22 Sep, 20:06OpenAI's GPT-6 Sol and Luna cut prices in half but barely move the needle on performance

Community8

Hacker News· 22 Sep, 18:00GPT-6 Sol and Luna1656 points · 798 commentsr/OpenAI· 22 Sep, 18:04Introducing GPT-6 Sol and Lunar/singularity· 22 Sep, 18:04Introducing GPT-6 Sol and Lunar/OpenAI· 22 Sep, 18:15It is official! Sol 6 and Luna 6 are here!r/OpenAI· 22 Sep, 19:12OpenAI launches GPT-6 Sol + Luna: Astra intelligence moves down the cost curver/OpenAI· 23 Sep, 16:21OpenAI rolls out upgraded prompt caching and reduced cached input rates for GPT-6r/singularity· 26 Sep, 23:42OpenAI DevDay Leaks | Ultrafast around 750 tokens/s, GPT-6 Sol on chatr/OpenAI· 27 Sep, 10:23Ain't PII if it ain't SSN

Analysis1

Simon Willison· 22 Sep, 23:46Claude Opus 5.5, GPT-6 Sol, GPT-6 Luna, and a new price war

How it unfolded

Every source in the order it appeared. Times in UTC.

22 Sep 18:00openai.com Introducing GPT-6 Sol and Luna22 Sep 18:00TechCrunch OpenAI launches GPT-6 Sol and Luna, boasting lower cost and fewer mistakes22 Sep 18:00Hacker News GPT-6 Sol and Luna22 Sep 18:04r/OpenAI Introducing GPT-6 Sol and Luna22 Sep 18:04r/singularity Introducing GPT-6 Sol and Luna22 Sep 18:10AWS Machine Learning blog Bring more intelligence to everyday work with GPT-6 Sol and GPT-6 Luna on Amazon Bedrock22 Sep 18:12OpenRouter OpenAI: GPT-6 Sol listed on OpenRouter22 Sep 18:13OpenRouter OpenAI: GPT-6 Sol Pro listed on OpenRouter22 Sep 18:13OpenRouter OpenAI: GPT-6 Luna listed on OpenRouter22 Sep 18:13OpenRouter OpenAI: GPT-6 Luna Pro listed on OpenRouter22 Sep 18:15r/OpenAI It is official! Sol 6 and Luna 6 are here!22 Sep 18:23Usage-limit resets by lab staff on X (via claude-resets.com) Codex and ChatGPT Work usage limits reset: GPT-6 Sol and Luna are out. Not only are they a very significant improvement across the board, but also in writing and general "you know when you try it" quality. We are also permanently reducing the API price by 50% making both of them…22 Sep 19:12r/OpenAI OpenAI launches GPT-6 Sol + Luna: Astra intelligence moves down the cost curve22 Sep 20:06The Decoder OpenAI's GPT-6 Sol and Luna cut prices in half but barely move the needle on performance22 Sep 21:00openai.com Better prompt caching for GPT-622 Sep 23:46Simon Willison Claude Opus 5.5, GPT-6 Sol, GPT-6 Luna, and a new price war23 Sep 01:00openai.com Airbnb widens access to GPT-6 Astra and OpenAI frontier models23 Sep 16:21r/OpenAI OpenAI rolls out upgraded prompt caching and reduced cached input rates for GPT-626 Sep 23:42r/singularity OpenAI DevDay Leaks | Ultrafast around 750 tokens/s, GPT-6 Sol on chat27 Sep 10:23r/OpenAI Ain't PII if it ain't SSN

What the numbers did

Signals for OpenAI from two hours before this story to ten days after: leaderboards, app charts, usage, prices and status.

UsageOpenAI's share of OpenRouter spend up 1.3 points in a week, to 27.1%StatusOpenAI reports degraded service: Help Center & Support Chat is downStatusOpenAI's status page is back to normal after 6 hoursStatusOpenAI reports degraded service: Elevated errors in ChatGPT Space PagesUsageOpenAI's share of OpenRouter spend up 1.4 points in a week, to 27.2%UsageOpenAI's share of OpenRouter spend up 1.5 points in a week, to 27.4%StatusOpenAI's status page is back to normal after 46 hoursUsageOpenAI's share of OpenRouter spend up 1.8 points in a week, to 27.7%StatusOpenAI reports degraded service: Issues with data analysis and file creation in ChatGPTArenaGPT-6.1 Sol enters Arena's text leaderboard at #18StatusOpenAI's status page is back to normal after 53 minutes

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