OpenAI adds GPT-6 Sol and Luna models to ChatGPT and Codex
OpenAI announced two new GPT‑6 variants, Sol and Luna, expanding the GPT‑6 family that already includes Astra. Both models run on fewer tokens than the GPT‑5.6 versions they replace and are priced about 50% lower, with API costs cut in half. OpenAI says Sol is suited for complex coding and agentic workflows, while Luna targets high‑volume, focused tasks.
What you can do with it
AI at Work →Draft routine work documents quickly and clearly
Produces structured but concise responses.
- Who for
- marketers, sales, founders and support teams
- Cost
- paid from $2
- Effort
- minutes
Use it for
- Draft routine text
- Summarize research
- Classify inquiries
Watch out Knowledge cutoff is April-May 2026; may not know latest events
Key points from the news
- OpenAI released GPT‑6 Sol and Luna, priced 50% lower than GPT‑5.6 versions.
- Models launch today in ChatGPT Work and Codex for Plus, Pro, Business, Enterprise, Edu; Luna also free for Go users.
- Sol matches Claude Opus 5 performance at 80% lower cost; Luna beats GPT‑5.6 Sol at one‑tenth cost.
The models are rolling out today in the ChatGPT desktop app and Codex. They are available to Plus, Pro, Business, Enterprise, and Edu users, and Luna can also be used by Free and Go users in the desktop app. Enterprise admins must enable the models in their workspaces. OpenAI cites internal benchmarks: Sol matches Claude Opus 5 on the OSWorld 2.0 offline test at roughly 80% lower cost per task, and Luna outperforms GPT‑5.6 Sol while costing only one‑tenth as much. Daily token usage among OpenAI researchers is reported to exceed $600 for the median user and $7,000 for the 90th percentile, highlighting the importance of cheaper, high‑performance models for sustained coding work.
Model pages: GPT-6 Sol → · GPT-6 Luna → · GPT-6 Astra →
The story so far
9 episodes →- OpenAI adds GPT-6 Sol and Luna models to ChatGPT and Codexthis story
OpenAI upgrading ChatGPT and Codex with two more GPT-6 models
9to5mac.com · 22 September 2026
Loading the full article…
This text was published by 9to5mac.com and written by Zac Hall. It is reproduced here with attribution so you can read it in full; the rights remain with the publisher. Read it at the source ↗
Coverage and discussion
47sources- Hacker News discussion · 197 pointsnews.ycombinator.com
- New Claude and GPT-6 announced 90 minutes apart. An AI's perspective on the same-day new model showdownPress · note.com ·
- Reading the GPT-6 Sol and Luna announcement numbers from the perspective of a professional user: 4 things I verified before comparing them to '9% of the cost of Opus 5'Press · note.com ·
- How to Use GPT-6 Sol/Luna to Reduce Monthly AI CostsPress · note.com ·
- Is GPT-6 Sol actually weaker than before? The truth behind OpenAI's new pricing modelPress · note.com ·
- Clarifying the Differences Between GPT-6 Astra, Sol, and Luna, and Their Availability in ChatGPT Plus Based on Official InformationPress · note.com ·
- Cannot find GPT-6 Sol/Luna. Things to check before paying for an upgradePress · note.com ·
- Which Codex GPT-6 Should You Choose? Comparing 7 Models by Performance and 'Fuel'Press · note.com ·
- Astra-level accuracy at half the price? A thorough check of GPT-6 Sol and LunaPress · note.com ·
- I asked GPT-6 Luna, Sol, and Astra—which differ in price by 100x—to perform the same task via API: The order of depth was not the order of pricePress · note.com ·
- GPT-6 Sol vs. Astra: Which One Should You Use?Press · note.com ·
- GPT-6 Sol/Luna API prices halved: Moving from 'one high-performance model' to a strategic mix for AI at workPress · note.com ·
- Just 3 weeks after the Astra announcement. The reason why OpenAI's "GPT-6 Sol" and "Luna" halved their API pricesPress · note.com ·
- [September 2026 Breaking News] OpenAI's "GPT-6 Sol & Luna" Arrive! API Prices Halved and Hallucinations Cut in Half—The Common Sense of AI Beginners Collapses OvernightPress · note.com ·
- GPT-6 Sol and Luna Released. The Competition Behind the Halved Prices: The Era of Continuous AI UsagePress · note.com ·
- The End of GPTs and the New Direction of ChatGPT Shown by GPT-6: AI Shifts from 'Smart Chat' to 'AI That Does Work'Press · note.com ·
- GPT-6 Sol and Luna Arrive: OpenAI's Vision for a World Where High-Performance AI Is More AccessiblePress · note.com ·
- Gentle AI Newspaper - For those in their 50s and 60s / Easy for beginnersPress · note.com ·
- OpenAI's New Models 'GPT-6 Sol' and 'Luna' Arrive! Why the 50% API Price Cut Will Revolutionize Business Development and Field DirectionPress · note.com ·
- How to choose between GPT-6 Sol/Luna and Claude Opus 5.5? — AI model selection in autumn 2026 shifts from 'the strongest' to 'division of labor'Press · note.com ·
- [Breaking News] New ChatGPT and Claude models are insane! The concept of "doing work" with AI is changingPress · note.com ·
- GPT-6 Sol and Luna | New ChatGPT models, API pricing is half that of the previous generationPress · note.com ·
- GPT-6 Sol/Luna and Claude Opus 5.5: How to Compare AI 'Price' and 'Quality'Press · note.com ·
- GPT-6 Sol and Luna Finally Announced. What Changes for Corporate AI Adoption?Press · note.com ·
- GPT-6 Sol and Luna Are Here: OpenAI Launches Cheaper AI Models With Major UpgradesPress · tech2geek.net ·
- OpenAI Launches GPT-6 Sol and Luna With 50% Lower API CostsPress · propakistani.pk ·
- The AI Race Shifts to 'Cost per Task'—The Next Battleground Revealed by GPT-6 Sol/LunaPress · note.com ·
- GPT-6 Sol and Luna: Which One Should You Choose? — Three Levels of 'Work Weight' Including AstraPress · note.com ·
- OpenAI Releases GPT-6 Sol and Luna: 50% Cheaper API Pricing and BenchmarksPress · MarkTechPost ·
- OpenAI cuts GPT-6 Sol and Luna API prices by 50%Press · finance.yahoo.com ·
- OpenAI GPT-6 Sol & Luna Halve Token Costs Across BenchmarksPress · aimagazine.com ·
- AI is shifting from a 'tool to ask questions' to a 'tool to put to work repeatedly.' What the GPT-6 pricing revealsPress · note.com ·
- What Changes with GPT-6 Sol & Luna? AI Utilization for SMEs and Kyushu AI Management | AI Ryohin, Fukuoka FDEPress · note.com ·
- OpenAI launches GPT-6 Sol and Luna, saying Sol makes about half as many mistakes as GPT-5.6 Sol and Luna matches GPT-5.6 Sol's performance at ~1% of the costPress · zdnet.com ·
- Bring more intelligence to everyday work with GPT-6 Sol and GPT-6 Luna on Amazon BedrockPrimary source · AWS Machine Learning Blog ·
- OpenAI launches GPT-6 Sol and Luna, boasting lower cost and fewer mistakesPress · TechCrunch AI ·
- ChatGPT-6 Sol and Luna are here: Pricing and benchmarks dataPress · mashable.com ·
- OpenAI Introduces GPT-6 Sol And Luna, Slashing API Prices 50% To Bring Advanced AI To More UsersPress · finance.yahoo.com ·
- Comparing Claude Code Fable and GPT-5.6 Sol | Which one is actually recommended? How to wisely use the 'strongest AI'Press · note.com ·
- GPT-6 Sol and LunaPrimary source · openai.com ·
The headline, key points and digest above were generated by Digest AI's editorial model from the linked sources. Automated summaries can contain errors: the sources are the record. Spotted a mistake? Tell us. Published by Martin K., who runs Digest AI and handles corrections.
More in Generative AI & Models
All →- Apiiro finds 1,122 public GitHub files with secrets saved by Claude Code · 1 src
- Thinking Machines releases Inkling 2 Small, a 594B MoE model with 17B active parameters · 8 src
- OpenAI releases GPT-6 Cyber, a Critical-rated model that outperforms predecessors in vulnerability detection and alignment · 25 src
- Google releases Gemini Omni 1.2 Flash with 15-second video generation and 30% price cut to $0.07 per second · 10 src
- US accuses Chinese executive of allegedly sharing Nvidia chip info with Beijing · 11 src
Comments
via GitHub Discussions