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Gpt 6 sol

GPT-6 Sol and Luna: What They Are, Where They Live, and When to Skip Astra

GPT-6 Sol and Luna: What They Are, Where They Live, and When to Skip Astra

Quick answer: GPT-6 Sol and Luna are OpenAI's two cheaper GPT-6 models, released September 22, 2026, sitting under GPT-6 Astra. Three names, one ladder, one rule: Astra for the hard jobs, Sol for everyday work, Luna for high-volume grunt work. They roll out in ChatGPT Work and Codex on paid plans. Neither one is in the Chat tab. And on my own $100 Pro account, the afternoon they launched, they were not in Work yet either. My desktop app had an update downloaded but not installed, so that list came from the older build. I will show you. Astra is the top rung, Sol is the middle, Luna is the bottom Here is the whole family on one table, using OpenAI's own words for each model and its API prices.Rung OpenAI's own line API price per 1M tokens (in / out) Leave it on forGPT-6 Astra "Our most capable model, built for the hardest end-to-end work" $10 / $50 Hard jobs: long documents, messy research, a real sparring partnerGPT-6 Sol "Built to power complex coding and agentic workflows" $2 / $10 Everyday workGPT-6 Luna "high-volume tasks with a clear goal, like summarizing documents, extracting information, or answering quick questions" $0.10 / $0.50 Grunt work you repeat a lotPrices and the first two lines are from OpenAI's model docs, read September 22. Luna's line is OpenAI's wording as quoted in TechCrunch's launch report. Read the price column as a ladder too. Astra costs 5 times what Sol costs per token. Sol costs 20 times what Luna costs. That's the ladder I'd use: Astra for the hard jobs, Sol for the everyday work, Luna for the grunt work. If the names still feel like a riddle, you are in good company. On Hacker News the day it launched, dyauspitr asked:"Wtf is GPT-6 Sol, I though GPT-6 is Astra?"Readerium answered with the best two-line explanation I have seen:"Number is generationName is the size (Luna smallest to Astra largest)"That is the system. The thread is worth a scroll if you want to see how many people are confused. One more thing that trips people up: there is no GPT-6 Terra. The GPT-5.6 family was Sol, Terra and Luna. GPT-6 swapped Terra out and put Astra on top. Sol and Luna live in Work and Codex, not in the Chat tab OpenAI's announcement, reposted in its community forum, says it plainly: "GPT-6 Sol and Luna roll out today in ChatGPT Work and Codex for Plus, Pro, Business, Enterprise, and Edu users. Both are also available in the API." Launch coverage from 9to5Mac adds that Free and Go users get Luna in the desktop app. So the Chat tab is not where you will find them. If Work is new to you, what ChatGPT Work is covers it in plain English. For which plan gets what on which surface, I keep one table on which ChatGPT plans get Astra, and I am not going to duplicate it here. Now the part the announcement cannot tell you. This is the Work model list on my Pro account on September 22, the afternoon of the launch:My ChatGPT Pro account, Work tab, September 22, 2026, on the older app build (an update was downloaded, not yet installed). GPT-6 Astra is there. Sol, Terra and Luna are still the GPT-5.6 versions. No GPT-6 Sol, no GPT-6 Luna yet. And here is the same list twelve days earlier, for comparison:Same account, same tab, September 10, 2026. No Astra, and the names did not even carry the "GPT-" prefix yet. Two things to take from that. "Rolls out today" and "is in your list today" are different days. And when GPT-6 Sol does land, it is going to sit right next to GPT-5.6 Sol, so check the number, not the name. If yours is missing too, update the desktop app before you conclude anything about your plan. Mine had an update downloaded but not yet installed when I took that screenshot, so a newer build may already show them. That is the same step OpenAI documented when GPT-6 Astra went missing for people. Leave Plus on Sol for everyday work and save Astra for the hard jobs Would I tell a Plus user to leave Work on Sol for the everyday stuff and save Astra for the hard jobs? Yeah, I would. Here is the honest part. I got used to using Astra, not gonna lie. But I run it on low, because it burns usage fast. That is literally a complaint, and it's legit. It's not efficient right now. It burns tokens. The numbers back me up. OpenAI's own allowance table from September 10 puts Astra at 5 to 45 messages per five hours on Plus, against 10 to 100 for GPT-5.6 Sol. That is roughly double the usage for the same conversation, and I walk through every tier in Astra's usage limits. That table is for the old Sol. OpenAI has not published ChatGPT limits for GPT-6 Sol or Luna yet. The same OpenAI help article is also why running Astra on low is not crazy. It says Astra at Low effort can outperform Sol at High effort. That was written about GPT-5.6 Sol, so treat it as a hint, not a rule for the new one. So my advice is simple: Sol stays selected for the everyday stuff. Astra comes out for the hard job, on low effort first. Sol's real wins are price and a reliability claim Sol deserves a fair hearing, and it has two genuine wins. The first is price. At $2 in and $10 out per million tokens, Sol is one fifth of Astra's API price. An OpenAI spokesperson told VentureBeat these "are permanent prices, not promotional or introductory pricing." The second is reliability. OpenAI says, per TechCrunch, that "GPT-6 Sol makes about half as many mistakes as its predecessor, reaching Astra-level reliability at much lower cost." That is OpenAI's own internal test, not an independent one. OpenAI's Tibo (Thibault Sottiaux) went further, in a post the community thread reposts: "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." My read, before I have run it: Sol should be good for a lot of the stuff. I expect it to be better than GPT-5.6 Sol, and more efficient. OpenAI's claim points the same way. OpenAI compared Sol to Opus 5 at medium effort, and Opus 5.5 shipped the same day Here is where I am a little disappointed. My opinion, going by the benchmarks and not my own runs: OpenAI basically dropped a cheaper, lower-tier model. It's nowhere near Claude Fable. It's nowhere near Opus 5.5. It's barely at Opus 5 level. That read holds up on OpenAI's own chart, with one caveat you should know about:Model Effort setting OSWorld 2.0 (computer use) Cost per taskGPT-6 Sol xhigh 60.5% About 80% lowerClaude Opus 5 medium 60.3% BaselineThese are OpenAI's numbers, as reported by VentureBeat on September 22. Look at the effort column. Sol's effort dial runs none, low, medium, high, xhigh, max, so xhigh is its second-highest setting. Opus 5 was at medium. Sol had to run near its top setting to tie Opus 5 at medium, and by OpenAI's math it still did that for about a fifth of the cost. Then Anthropic released Claude Opus 5.5 hours before OpenAI's announcement. Anthropic says Opus 5.5 performs at the level of Fable 5.1 on most work, at $4 in and $20 out per million tokens. OpenAI's material has no Opus 5.5 comparison. In fairness to Sol, it is still half of Opus 5.5's price per token. I compare Opus 5.5 with Fable properly in Opus 5.5 vs Fable. The way I see it, 5.5 is a huge leap. You literally got a better model and it's cheaper. Sol is a sidekick for grunt work, not my main model Does Sol feel like a real option to me? To be honest, no. I think it's gonna be a good sidekick for research and the grunt work I just want to burn usage on. If I want to tinker around and brainstorm, I'm still gonna use Astra. So I have to find a use case for it. That is the honest status on day one: I have not run GPT-6 Sol or Luna on a real job yet, and it was not even in my list when I wrote this, on an app build one update behind. I also have a complaint about the model count, and then I have to take half of it back. I think this whole game of having five different models makes it seem like you have more options, when really you've got one or two good things. That's what I like Anthropic for right now, because it's not complicated. You've got Haiku, Sonnet, Opus and Fable. So they do have a lot of models too, actually. Never mind. But I rarely use Haiku. I rarely use Sonnet. I'm just using Opus and Fable. If that is where you are too, how I run Claude at work is the setup I actually use. What nobody knows yet A few things were not public when I wrote this, and I would rather say so than guess:ChatGPT limits for GPT-6 Sol and Luna. OpenAI has published no message numbers for either one. When the Chat tab gets them. The announcement only names Work and Codex. How much Luna a Free account gets. Launch coverage says Free and Go users get Luna in the desktop app, with no number. Whether GPT-6 Sol still loses to Astra on Low. OpenAI's effort advice was written for GPT-5.6 Sol.I log plan and limit changes with dates on the AI plan tracker, and the box at the bottom of this page emails you when one moves. Which one to pick depends on what you pay forIf you are on Plus: leave Work on Sol for everyday tasks once it shows up. Pull out Astra for the hard job, on low effort first, because it cost roughly double the usage of the old Sol. If you are on Pro: you have room for Astra, and I still run it on low. Send Sol the bulk research you would rather not spend Astra on. If you are on Free or Go: Luna in the desktop app is your only GPT-6 door. Use it for summaries, pulling details out of a document, and quick questions, which is exactly what OpenAI built it for. If you also pay for Claude: Opus 5.5 is the one to beat now, and OpenAI did not even compare Sol to it. Treat Sol as a cheap sidekick, not a switch.Frequently asked questions What is GPT-6 Sol? GPT-6 Sol is OpenAI's middle GPT-6 model, released September 22, 2026. It sits under GPT-6 Astra and above GPT-6 Luna. OpenAI's developer docs describe it as built to power complex coding and agentic workflows, and it costs $2 per million input tokens and $10 per million output tokens in the API, one fifth of Astra's price. What is the difference between GPT-6 Sol and Luna? Sol is the everyday model for real work. Luna is the small, cheap one for high-volume tasks with a clear goal, which OpenAI lists as summarizing documents, extracting information, or answering quick questions. In the API, Sol costs $2 in and $10 out per million tokens, and Luna costs $0.10 in and $0.50 out, so Sol is 20 times the price of Luna. Is GPT-6 Sol better than GPT-6 Astra? No. Astra is the top of the GPT-6 ladder and Sol is the middle rung. OpenAI says Sol reaches Astra-level reliability on its internal factuality test at much lower cost, but Astra is still the model OpenAI builds for the hardest end-to-end work. Use Sol for everyday tasks and save Astra for the hard jobs. Where can I use GPT-6 Sol and Luna in ChatGPT? OpenAI says both roll out in ChatGPT Work and Codex for Plus, Pro, Business, Enterprise, and Edu users, and not in the Chat tab. Launch coverage (9to5Mac, VentureBeat) adds that Free and Go users get GPT-6 Luna in the ChatGPT desktop app. On launch day afternoon, my own Pro account's Work list still showed GPT-5.6 Sol and Luna, on a desktop app with an update downloaded but not yet installed, so update the app first if yours is missing them. Is GPT-6 Luna free? Partly. Launch coverage from 9to5Mac and VentureBeat says Free and Go users get GPT-6 Luna in the ChatGPT desktop app, and OpenAI's help center had not caught up on launch day. Sol is for paid plans only. OpenAI has not published how many Luna messages a free account gets. What happened to GPT-6 Terra? There is no GPT-6 Terra. The GPT-5.6 family had three sizes, Sol, Terra, and Luna. The GPT-6 family announced so far has three different names: Astra on top, Sol in the middle, and Luna at the bottom. Where this comes from The facts come from OpenAI's docs and announcement, plus TechCrunch and VentureBeat, read September 22, 2026. The screenshots are my own Pro account, and the opinions are mine. I have not run GPT-6 Sol or Luna yet. My list still showed the 5.6 versions, with an app update downloaded but not installed. Published September 22, 2026. Last reviewed September 22, 2026.

GPT-6 in ChatGPT: Which Plan Gets Astra, Sol and Luna. Plus Has All Three, Just Not in Chat

GPT-6 in ChatGPT: Which Plan Gets Astra, Sol and Luna. Plus Has All Three, Just Not in Chat

Updated September 22, 2026, the day OpenAI shipped GPT-6 Sol and GPT-6 Luna. First published September 4, when Astra was the only GPT-6 model. Quick answer: if you pay $20 for ChatGPT Plus, OpenAI says you get all three GPT-6 models: Astra, Sol and Luna. You just do not get any of them in the chat box. OpenAI puts them inside ChatGPT Work and Codex on Plus, Pro, Business and Enterprise. Edu gets Sol and Luna there too. Chat still runs GPT-5.6 models, plus GPT-6 Pro (that is Astra) on Pro $100, Pro $200, Business and Enterprise. That is OpenAI's stated rollout, and "rolling out" is the key phrase there. On launch afternoon my own Pro account showed Astra, but not GPT-6 Sol or Luna yet. That was the older app build: an update had downloaded but was not installed. Free and Go get one GPT-6 model: Luna, in the desktop app. That part comes from press reports (9to5Mac, VentureBeat), not from OpenAI's help center yet. Availability is per surface, not per plan. OpenAI has now made that split twice, and it is the whole story. Here is the table. The plan by surface table, three models wide Same plan, different answer depending on where you open it. In the Work and Codex columns, Sol and Luna mean the new GPT-6 Sol and GPT-6 Luna.Plan Chat ChatGPT Work Codex Desktop appFree GPT-5.6 Luna. No GPT-6 No GPT-6 GPT-5.6 Terra only GPT-6 Luna (press reports)Go GPT-5.6 Luna. No GPT-6 No GPT-6 GPT-5.6 Terra only GPT-6 Luna (press reports)Plus GPT-5.6 Sol. No GPT-6 Astra, Sol, Luna Astra, Sol, Luna Same as Chat and WorkPro $100 GPT-6 Pro (Astra), GPT-5.6 Sol Astra, Sol, Luna Astra, Sol, Luna Same as Chat and WorkPro $200 GPT-6 Pro (Astra), GPT-5.6 Sol Astra, Sol, Luna Astra, Sol, Luna Same as Chat and WorkBusiness GPT-6 Pro (Astra) Astra, Sol, Luna Astra, Sol, Luna Same as Chat and WorkEnterprise GPT-6 Pro (Astra), off by default Astra, Sol, Luna Astra, Sol, Luna Same as Chat and WorkEdu No GPT-6 announced Sol, Luna Sol, Luna Same as Chat and WorkSources, checked September 22, 2026: OpenAI's GPT-6 Sol and Luna announcement as posted to its community forum, the GPT-6 Astra announcement (September 3), and OpenAI's help article on GPT-6 Pro. The Free and Go desktop Luna line comes from 9to5Mac and VentureBeat. OpenAI's help center had not caught up to it when I checked. For Astra on Plus, the rollout is done. On September 4, OpenAI's Codex and ChatGPT lead Thibault Sottiaux posted on X that "Astra is now rolled out to all Plus and Business users too." Three details that decide real cases:Rollout is gradual, and OpenAI says availability can differ between Chat, Work and Codex on the same account. Work and Codex share one usage pool. GPT-6 Pro in Chat has its own, separate limits. OpenAI has not published message limits for GPT-6 Sol or Luna in ChatGPT yet. Anyone quoting a number is guessing.Launch day on my Pro account: Chat did not move I checked my own ChatGPT Pro $100 account in the desktop app on September 22, the day Sol and Luna shipped. One catch up front. The app had an update (version 26.908.70816) downloaded and ready, but not installed. So every launch-day screenshot on this page comes from the older build. Here is the Chat picker on September 5.And here it is on launch day.Same three rows: Latest, GPT-5.6 Sol, GPT-5.5. No GPT-6 Sol, no GPT-6 Luna. That matches what OpenAI said, since Chat was never on the list. Then I switched to Work on the same account.GPT-6 Astra is there by name. Next to it sit GPT-5.6 Sol, Terra and Luna. GPT-6 Sol and Luna had not reached my Work list yet when I checked, on that older build. A newer build may already show them. So "rolling out" means rolling out, even on a $100 plan. If yours is missing too, install any waiting app update and give it a day before you blame your plan. Same trap, second time On September 3 OpenAI announced Astra for "all ChatGPT Plus, Pro, Business, and Enterprise users." A day later the help center added the catch:GPT-6 Pro, powered by GPT-6 Astra, is rolling out in ChatGPT for Pro $100, Pro $200, Business and Enterprise plans. Plus plans include GPT-6 Astra in ChatGPT Work and Codex as it rolls out.Most news write-ups quoted the first sentence and stopped. So Plus users opened Chat, saw no Astra, and decided their account was broken. On September 22 OpenAI did it again, with the surface right in the sentence this time:GPT-6 Sol and Luna roll out today in ChatGPT Work and Codex for Plus, Pro, Business, Enterprise, and Edu users.The difference: Astra skipped Chat for Plus. Sol and Luna skip Chat for everyone, Pro included. The naming is not helping. dyauspitr on Hacker News asked it best on launch day: "Wtf is GPT-6 Sol, I though GPT-6 is Astra?" The number is the generation, the name is the size:GPT-6 Astra is the top model, out since September 3. GPT-6 Sol is the everyday model for complex work. OpenAI says it is "built for complex coding and agentic workflows." GPT-6 Luna is the small, fast one, for "high-volume tasks with a clear goal, like summarizing documents, extracting information, or answering quick questions."When to pick which is its own page: GPT-6 Sol and Luna explained. The picker slot that decides it Here is the mechanical reason a Plus account cannot show you GPT-6 Pro in Chat. ChatGPT's picker has reasoning levels: Instant, Medium, High, Extra High, and Pro. GPT-6 Pro lives under the Pro option, next to GPT-5.6 Sol Pro. Plus does not have the Pro option at all.That table is about GPT-5.6 Sol reasoning levels, but it is the same door. No Pro slot means no GPT-6 Pro, no matter how long you wait. This is a plan gate, not a queue. Read the number, not the name If you are scrolling the Chat picker hunting for the word "Astra," you will not find it there. In Chat it is GPT-6 Pro, per OpenAI's help center. In the API it is gpt-6-astra. In Work, my list now says GPT-6 Astra, and on September 5 the Work composer chip read GPT-6 Astra Ultra. Sol now has the same problem from the other side. The "GPT-5.6 Sol" in your Chat picker is the older model. GPT-6 Sol is a different, newer model that lives in Work and Codex. Same name, different generation. Read the number before you decide what you have. While you are in there: GPT-6 Pro and GPT-5.6 Sol Pro are two different models that share an allowance on some tiers. On the $100 tier they draw from one pool. That is its own decision: ChatGPT Pro $100 vs $200. What I leave selected on Pro I pay for ChatGPT Pro at $100. I dropped down from the $200 tier to free up budget for another tool.That is my Usage & billing screen, September 5: Pro at $100 a month, with 30% of the weekly limit left. So which of the three stays selected? Here is how I put it on launch day:On my Pro account, the hundred dollar one, I probably use Astra on low.In the app, the lowest Astra effort is labeled Light.Next, I want to start experimenting with Sol at a higher effort, because if I remember right it is cheaper. My rule for this is simple:You wanna just pay for the optimized model. Don't pay more for less, essentially. That's my model.Two honest notes on that. OpenAI has not published how much of your ChatGPT allowance GPT-6 Sol uses, so "cheaper" is not a plan number yet. It is on the API price sheet, at $2 per million input tokens and $10 output, and inside Work, Astra already costs at least double GPT-5.6 Sol per message (Astra usage limits explained). And GPT-6 Sol was not in my Work list yet when I checked, on an app build with an update still waiting to install. So the Sol part is my plan, not a result. Early days versus two weeks in On September 5 I wrote here that Astra barely moved my usage: a couple of percent across a handful of tasks. That was early days and light runs. It did not hold. By September 18 I was saying the opposite about Astra:I'd use Sol or just Astra low, but it will burn your usage fast, I mean Astra.Believe the second one. That is exactly why Astra sits on Light and Sol is the next thing I test. I have also seen OpenAI reset limits generously lately. That is my observation, not an OpenAI commitment, so do not budget around it. Should you jump from Plus to Pro just to get it in chat? No. Not for that reason alone. September 22 made the case weaker, not stronger: Pro got nothing new in Chat. Here is my rule, and it has not changed for any model launch: let the pain tell you. Do not upgrade because a launch made you feel behind. Upgrade when you are actually hitting a wall that costs you time. Three specific reasons the jump is usually wrong right now:Plus already gets Astra, Sol and Luna. OpenAI's rollout puts all three in Work and Codex. If your work is research, documents or anything agentic, that is where you want them anyway. The chat allowance is small. Pro $100 is 50 GPT-6 Pro messages a week, shared with GPT-5.6 Sol Pro. That is a real ceiling, not an unlimited upgrade. $80 a month is a lot to pay for a picker entry. If you want a second frontier model, $20 on a second provider buys a whole separate allowance. That trade is priced out in Claude Pro vs ChatGPT Plus.The honest exception: if you already hit Plus limits every week and wait on resets, you were going to upgrade anyway. Before you conclude you are missing it Run this list first. Most "I don't have GPT-6" posts are one of these.Check the surface. Open ChatGPT Work or Codex, not the chat box. That is where all three GPT-6 models live on Plus. Give it a day. Rollout is gradual. On my own Pro account, GPT-6 Sol and Luna were not in Work on launch day, on an app build with an update not yet installed. Update Codex. OpenAI says Astra needs Codex CLI 0.153.0 or newer. It has not published a minimum for Sol and Luna yet, so just update to the latest. Update the desktop app. If an update is sitting there downloaded, install it. On Free and Go, press reports say the desktop app is the only place GPT-6 Luna shows up. On Enterprise, ask your admin. OpenAI says Enterprise access to Astra is off by default and depends on your workspace's model permissions.If you have done all five on a paid plan and still see nothing, you are in the rollout queue, not excluded. The one-paragraph version Per OpenAI's rollout, Plus, Pro, Business and Enterprise get GPT-6 Astra, Sol and Luna in ChatGPT Work and Codex, and Edu gets Sol and Luna there. Chat did not get GPT-6 Sol or Luna on any plan. In Chat, Astra is called GPT-6 Pro and needs Pro $100, Pro $200, Business or Enterprise. Free and Go get GPT-6 Luna in the desktop app only, per press reports. No plan change is worth making on launch-day panic. FAQ Does ChatGPT Plus have GPT-6 Sol? Yes, in ChatGPT Work and Codex, rolling out from September 22, 2026. Not in Chat: the Sol in the Chat picker is still GPT-5.6 Sol, on Plus and on Pro. OpenAI has not published GPT-6 Sol message limits for ChatGPT yet. Is GPT-6 Luna free? Partly. Per OpenAI's rollout as reported by 9to5Mac and VentureBeat, Free and Go users get GPT-6 Luna in the ChatGPT desktop app. OpenAI's help center still lists GPT-5.6 Luna for Free and Go as of September 22, 2026. On the API it is paid: $0.10 per million input tokens and $0.50 per million output. Is GPT-6 Astra available on ChatGPT Plus? Yes, but not in the normal chat model picker. OpenAI's help center says Plus includes GPT-6 Astra in ChatGPT Work and Codex. In the chat picker the model is branded GPT-6 Pro, and that is listed for Pro $100, Pro $200, Business and Enterprise only. Plus is not excluded from Astra, it is looking in the wrong surface. Why can't I find GPT-6 in my ChatGPT model picker? Usually one of three things. You are looking in Chat, and GPT-6 Sol and Luna are not in Chat on any plan. The gradual rollout has not reached your account yet. Or you are on Enterprise, where OpenAI says Astra access is off by default and an admin has to enable it. What is GPT-6 Astra called inside ChatGPT? GPT-6 Pro, in Chat. OpenAI's help center describes GPT-6 Pro as powered by GPT-6 Astra, and it sits under the Pro option in the reasoning picker alongside GPT-5.6 Sol Pro. In Work it is listed as GPT-6 Astra. Chat has not moved to GPT-6 Sol. Do Free and Go plans get GPT-6 Astra? No. Free and Go get no Astra and no Sol. Their Chat default is still GPT-5.6 Luna per OpenAI's help center, and in Codex they get GPT-5.6 Terra only. The one GPT-6 model they do get is Luna, in the desktop app, per press reports. Does GPT-6 Astra cost extra? Not by itself. OpenAI says Astra usage is included within existing subscription allowances, and that users will also be able to buy credits for more usage. The allowances are real though: GPT-6 Pro in Chat is metered per week, and Work and Codex share a separate pool. Do I need to update anything to use GPT-6? Yes, if you use Codex. OpenAI's help center says Astra needs Codex CLI 0.153.0 or newer and the latest ChatGPT desktop app. It has not published a minimum version for Sol and Luna yet, so update Codex and the desktop app to the latest before you conclude you are missing them. Correction logSeptember 4, 2026. Published for GPT-6 Astra, the only GPT-6 model at the time. September 22, 2026. Rebuilt the table for Astra, Sol and Luna after OpenAI shipped Sol and Luna to Work and Codex. Added launch-day screenshots from my Pro account. Qualified my September 5 line that Astra "barely moved my usage" as early days, because two weeks of real use said the opposite.Where this comes from OpenAI's Sol and Luna announcement, its help center, and the 9to5Mac and VentureBeat reports, all read September 22. The screenshots are my own Pro $100 account, on September 5 and on launch day. I have not run GPT-6 Sol or Luna yet. They were not on my app build, and an update was still waiting to install. Deciding between the top tiers instead? That is Claude Max vs ChatGPT Pro. Plan changes as they happen live on the AI plan tracker, and everything I run and pay for lives on Claude at Work.