Claude Haiku 5.5 vs GPT-6 Luna

Claude Haiku 5.5 and GPT-6 at a glance

Claude Haiku 5.5 is an Anthropic model available in Quad Chat, with up to 1M 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 Luna, on the Free plan, because that is the variant this comparison is usually about; the variant table covers the rest of the family.

Claude Haiku 5.5 vs GPT-6 Luna

The variants this comparison is about, side by side. Lab: Claude Haiku 5.5 Anthropic, GPT-6 Luna OpenAI. Plan needed: Claude Haiku 5.5 Free, GPT-6 Luna Free. Context window: Claude Haiku 5.5 1M tokens, GPT-6 Luna 1.05M tokens. Max output: Claude Haiku 5.5 128K tokens, GPT-6 Luna 128K tokens. API input price: Claude Haiku 5.5 $0.10 per 1M, GPT-6 Luna $0.10 per 1M. API output price: Claude Haiku 5.5 $0.50 per 1M, GPT-6 Luna $0.50 per 1M. Image input: Claude Haiku 5.5 Yes, GPT-6 Luna Yes. Tool calling: Claude Haiku 5.5 Yes, GPT-6 Luna Yes. Reasoning: Claude Haiku 5.5 Yes, adjustable (low, medium, high, xhigh, max), GPT-6 Luna Yes, adjustable (low, medium, high, xhigh, max). Privacy lane: Claude Haiku 5.5 Private Lane (Zero Data Retention), GPT-6 Luna Private Lane (Zero Data Retention).

Choose Claude Haiku 5.5 or GPT-6

Each point below comes from a real difference in the catalog data. Choose Claude Haiku 5.5 if: The catalog shows no spec advantage for Claude Haiku 5.5 in this pairing, so choose it after running your own prompts on both. Choose GPT-6 if: 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 ($0.50 per million tokens). Both families start on the Free plan. Their context windows are within 10% of each other (1M 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 Claude Haiku 5.5 and GPT-6 in the same conversation, or ask both at once and compare the answers.

Every Claude Haiku 5.5 and GPT-6 variant

All selectable variants of both families. Click a header to sort. Claude Haiku 5.5: Claude Haiku 5.5 (Free). GPT-6: GPT-6 Astra (Pro), GPT-6 Sol (Pro), GPT-6 Luna (Free).

Frequently asked questions

Is Claude Haiku 5.5 or GPT-6 cheaper?

Their top variants have the same API list price: $0.10 in / $0.50 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, Claude Haiku 5.5 or GPT-6?

GPT-6 reaches 1.05M tokens, against 1M for Claude Haiku 5.5, according to the model catalog Quad Chat routes through. Files, pasted text and earlier messages all count toward the window.

Which Quad Chat plan do I need for Claude Haiku 5.5 and GPT-6?

Claude Haiku 5.5 needs the Free 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 Claude Haiku 5.5 and GPT-6 support images, tools and reasoning?

Claude Haiku 5.5: image input yes, tool calling yes, reasoning yes. GPT-6 Luna: image input yes, tool calling yes, reasoning yes. Other variants in each family can differ, as the variant table shows.

Can I use Claude Haiku 5.5 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 Claude Haiku 5.5 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.