GPT-6.1 Sol vs GPT-6 Astra, Sol and Luna

GPT-6.1 Sol and GPT-6 at a glance

GPT-6.1 Sol is an OpenAI model available in Quad Chat, with up to 1.05M tokens of context, image input, tool calling and adjustable reasoning. GPT-6 is an OpenAI model family with 3 variants (Astra, Sol and Luna) available in Quad Chat, with up to 1.05M tokens of context, image input, tool calling and adjustable reasoning. This page compares specifications and plan availability from the Quad Chat model catalog. It does not publish benchmark scores, because quality depends on your task; the quickest fair test is to send the same prompt to both models in one Quad Chat conversation. For GPT-6 the head-to-head uses GPT-6 Sol, on the Pro ($15/month) plan, because that is the variant this comparison is usually about; the variant table covers the rest of the family.

GPT-6.1 Sol vs GPT-6 Sol

The variants this comparison is about, side by side. Lab: GPT-6.1 Sol OpenAI, GPT-6 Sol OpenAI. Plan needed: GPT-6.1 Sol Pro ($15/month), GPT-6 Sol Pro ($15/month). Context window: GPT-6.1 Sol 1.05M tokens, GPT-6 Sol 1.05M tokens. Max output: GPT-6.1 Sol 128K tokens, GPT-6 Sol 128K tokens. API input price: GPT-6.1 Sol $2.00 per 1M, GPT-6 Sol $2.00 per 1M. API output price: GPT-6.1 Sol $10.00 per 1M, GPT-6 Sol $10.00 per 1M. Image input: GPT-6.1 Sol Yes, GPT-6 Sol Yes. Tool calling: GPT-6.1 Sol Yes, GPT-6 Sol Yes. Reasoning: GPT-6.1 Sol Yes, adjustable (low, medium, high, xhigh, max), GPT-6 Sol Yes, adjustable (low, medium, high, xhigh, max). Privacy lane: GPT-6.1 Sol Private Lane (Zero Data Retention), GPT-6 Sol Private Lane (Zero Data Retention).

Cheapest GPT-6.1 Sol vs cheapest GPT-6

The lowest-priced variant of each family, for everyday use. Lab: GPT-6.1 Sol OpenAI, GPT-6 Luna OpenAI. Plan needed: GPT-6.1 Sol Pro ($15/month), GPT-6 Luna Free. Context window: GPT-6.1 Sol 1.05M tokens, GPT-6 Luna 1.05M tokens. Max output: GPT-6.1 Sol 128K tokens, GPT-6 Luna 128K tokens. API input price: GPT-6.1 Sol $2.00 per 1M, GPT-6 Luna $0.10 per 1M. API output price: GPT-6.1 Sol $10.00 per 1M, GPT-6 Luna $0.50 per 1M. Image input: GPT-6.1 Sol Yes, GPT-6 Luna Yes. Tool calling: GPT-6.1 Sol Yes, GPT-6 Luna Yes. Reasoning: GPT-6.1 Sol Yes, adjustable (low, medium, high, xhigh, max), GPT-6 Luna Yes, adjustable (low, medium, high, xhigh, max). Privacy lane: GPT-6.1 Sol Private Lane (Zero Data Retention), GPT-6 Luna Private Lane (Zero Data Retention).

Choose GPT-6.1 Sol or GPT-6

Each point below comes from a real difference in the catalog data. Choose GPT-6.1 Sol if: The catalog shows no spec advantage for GPT-6.1 Sol in this pairing, so choose it after running your own prompts on both. Choose GPT-6 if: You want the cheapest entry point: GPT-6 Luna lists at $0.10 in / $0.50 out, below GPT-6.1 Sol at $2.00 in / $10.00 out. You want to start on a lower plan: GPT-6 has a variant on the Free plan (no credit card), while GPT-6.1 Sol starts at Pro ($15/month). You like choosing a size: GPT-6 comes in 3 variants (GPT-6 Astra, GPT-6 Sol and GPT-6 Luna), against 1. The variants compared above list at the same output price ($10.00 per million tokens). Their context windows are within 10% of each other (1.05M and 1.05M tokens). Their longest replies are within 10% of each other (128K and 128K tokens). You do not have to choose: Quad Chat lets you switch between GPT-6.1 Sol and GPT-6 in the same conversation, or ask both at once and compare the answers.

GPT-6 Astra, GPT-6 Sol and GPT-6 Luna explained

GPT-6 comes in 3 variants in Quad Chat. The differences below are read from the catalog. GPT-6 Astra needs the Pro ($15/month) plan, lists at $10.00 in / $50.00 out per million tokens, reads up to 1.05M tokens of context and offers 5 reasoning levels. GPT-6 Sol needs the Pro ($15/month) plan, lists at $2.00 in / $10.00 out per million tokens, reads up to 1.05M tokens of context and offers 5 reasoning levels. GPT-6 Luna needs the Free plan, lists at $0.10 in / $0.50 out per million tokens, reads up to 1.05M tokens of context and offers 5 reasoning levels.

Every GPT-6.1 Sol and GPT-6 variant

All selectable variants of both families. Click a header to sort. GPT-6.1 Sol: GPT-6.1 Sol (Pro). GPT-6: GPT-6 Astra (Pro), GPT-6 Sol (Pro), GPT-6 Luna (Free).

Frequently asked questions

Is GPT-6.1 Sol or GPT-6 cheaper?

Their top variants have the same API list price: $2.00 in / $10.00 out per million tokens. API prices are the model provider's list prices per million tokens, shown for comparison only. Quad Chat plans have a flat monthly price and draw usage from shared credits, so you are not billed per token.

Which has the larger context window, GPT-6.1 Sol or GPT-6?

They match: both reach 1.05M tokens. Files, pasted text and earlier messages all count toward the window.

Which Quad Chat plan do I need for GPT-6.1 Sol and GPT-6?

GPT-6.1 Sol needs the Pro ($15/month) plan. GPT-6 starts on the Free plan, and its top variant, GPT-6 Astra, needs the Pro ($15/month) plan. Plans are cumulative, and every plan shares one monthly credit balance (100 on Free up to 25,000 on Max).

Do GPT-6.1 Sol and GPT-6 support images, tools and reasoning?

GPT-6.1 Sol: image input yes, tool calling yes, reasoning yes. GPT-6 Sol: image input yes, tool calling yes, reasoning yes. Other variants in each family can differ, as the variant table shows.

Can I use GPT-6.1 Sol and GPT-6 in the same chat?

Yes. In Quad Chat you can switch between models mid-conversation without losing your files or context, or send one prompt to both and compare the answers side by side, which is the most reliable way to decide between them for your own work. Side-by-side comparison is included on every plan.

Is GPT-6.1 Sol or GPT-6 more private in Quad Chat?

Both top variants run on the Private Lane, routed to providers under Zero Data Retention terms. Quad Chat does not train models on your conversations either way.