Claude Sonnet 5.5 vs Claude Haiku 5.5

Claude Sonnet 5.5 and Claude Haiku 5.5 at a glance

Claude Sonnet 5.5 is an Anthropic model available in Quad Chat, with up to 1M tokens of context, image input, tool calling and adjustable reasoning. 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. 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. Each family has a single variant, so the head-to-head compares them directly.

Claude Sonnet 5.5 vs Claude Haiku 5.5

Top variant of each family, side by side. Lab: Claude Sonnet 5.5 Anthropic, Claude Haiku 5.5 Anthropic. Plan needed: Claude Sonnet 5.5 Pro ($15/month), Claude Haiku 5.5 Free. Context window: Claude Sonnet 5.5 1M tokens, Claude Haiku 5.5 1M tokens. Max output: Claude Sonnet 5.5 128K tokens, Claude Haiku 5.5 128K tokens. API input price: Claude Sonnet 5.5 $2.00 per 1M, Claude Haiku 5.5 $0.10 per 1M. API output price: Claude Sonnet 5.5 $10.00 per 1M, Claude Haiku 5.5 $0.50 per 1M. Image input: Claude Sonnet 5.5 Yes, Claude Haiku 5.5 Yes. Tool calling: Claude Sonnet 5.5 Yes, Claude Haiku 5.5 Yes. Reasoning: Claude Sonnet 5.5 Yes, adjustable (low, medium, high, xhigh, max), Claude Haiku 5.5 Yes, adjustable (low, medium, high, xhigh, max). Privacy lane: Claude Sonnet 5.5 Private Lane (Zero Data Retention), Claude Haiku 5.5 Private Lane (Zero Data Retention).

Choose Claude Sonnet 5.5 or Claude Haiku 5.5

Each point below comes from a real difference in the catalog data. Choose Claude Sonnet 5.5 if: The catalog shows no spec advantage for Claude Sonnet 5.5 in this pairing, so choose it after running your own prompts on both. Choose Claude Haiku 5.5 if: You want the lower API list price at the top tier: Claude Haiku 5.5 lists at $0.10 in / $0.50 out against $2.00 in / $10.00 out for Claude Sonnet 5.5, about 20× less per output token. You want to start on a lower plan: Claude Haiku 5.5 has a variant on the Free plan (no credit card), while Claude Sonnet 5.5 starts at Pro ($15/month). You want top-tier access for less: Claude Haiku 5.5 needs Free, while Claude Sonnet 5.5 needs Pro ($15/month). Their context windows are within 10% of each other (1M and 1M 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 Sonnet 5.5 and Claude Haiku 5.5 in the same conversation, or ask both at once and compare the answers.

Every Claude Sonnet 5.5 and Claude Haiku 5.5 variant

All selectable variants of both families. Click a header to sort. Claude Sonnet 5.5: Claude Sonnet 5.5 (Pro). Claude Haiku 5.5: Claude Haiku 5.5 (Free).

Frequently asked questions

Is Claude Sonnet 5.5 or Claude Haiku 5.5 cheaper?

At provider list prices, Claude Haiku 5.5 is cheaper at the top tier ($0.10 in / $0.50 out against $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, Claude Sonnet 5.5 or Claude Haiku 5.5?

They match: both reach 1M tokens. Files, pasted text and earlier messages all count toward the window.

Which Quad Chat plan do I need for Claude Sonnet 5.5 and Claude Haiku 5.5?

Claude Sonnet 5.5 needs the Pro ($15/month) plan. Claude Haiku 5.5 needs the Free plan. Plans are cumulative, and every plan shares one monthly credit balance (100 on Free up to 25,000 on Max).

Do Claude Sonnet 5.5 and Claude Haiku 5.5 support images, tools and reasoning?

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

Can I use Claude Sonnet 5.5 and Claude Haiku 5.5 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 Sonnet 5.5 or Claude Haiku 5.5 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.