Model · Claude
Claude Sonnet 5.5: price, limits and messages on every plan
Anthropic's Claude Sonnet 5.5 in llmwise: how many Claude Sonnet 5.5 messages each plan gives, what counts against them, what Claude Sonnet 5.5 reads, where your messages go, and what it costs at Anthropic's API prices.
Prices and limits checked against OpenRouter's Claude Sonnet 5.5 page. Updated .
Short answer
Claude Sonnet 5.5 is in llmwise's one-time free trial of 5 messages. A paid plan gives up to 125 Claude Sonnet 5.5 messages a month on Pro ($20), 400 on Max ($50), 900 on Ultra ($100) and 2,000 on Studio ($200). Each Claude Sonnet 5.5 message's price is shown before you send it.
In the news: Claude Sonnet 5.5 is out: what changed, and what it costs you ().
What Anthropic announced, sourced on its launch page:
- Anthropic calls Sonnet 5.5 the second model in the Claude 5.5 family, and a faster, lower-cost complement to Claude Opus 5.5.
- Anthropic says Sonnet 5.5 writes its output more than 30% faster than Sonnet 5, and costs up to 30% less per task because it needs far fewer tokens for the same work.
- Cache reads cost $0.20 per million tokens and cache writes $2.50 per million, half of Opus 5.5's cache-write price.
Claude Sonnet 5.5 on every plan
What Claude Sonnet 5.5 costs in llmwise is a count, not a token bill: up to 125 a month on Pro, and it's one of the models in the 5-message free trial.
| Plan | Price | Claude Sonnet 5.5 messages | Each, if all go to Claude Sonnet 5.5 |
|---|---|---|---|
| Free | $0 | In the one-time trial of 5 messages | — |
| Pro | $20 a month | Up to 125 a month | $0.16 |
| Max | $50 a month | Up to 400 a month | $0.13 |
| Ultra | $100 a month | Up to 900 a month | $0.11 |
| Studio | $200 a month | Up to 2,000 a month | $0.10 |
Prices don't include tax, which is added where it applies and shown before you pay. A paid plan's month is one allowance every model shares, so each Claude Sonnet 5.5 count is the most you get if all of it goes to Claude Sonnet 5.5, and "each" is the plan's price divided by that count. How pricing works.
Every limit is published. Paid plans also have a monthly fair-use limit on AI cost: Pro $7.50, Max $20, Ultra $42, Studio $85. Using every message on your plan at typical sizes stays under it; very large messages and heavy research use it faster. Every limit, explained.
Claude Sonnet 5.5 usage limits, explained
Every limit on Claude Sonnet 5.5 in llmwise is published. Here's each one, in Claude Sonnet 5.5 messages.
Claude Sonnet 5.5 draws on the monthly allowance every model shares: 125 Claude Sonnet 5.5 messages on Pro if nothing else uses it. Each message on a smaller model leaves fewer Claude Sonnet 5.5 messages, each Claude Sonnet 5.5 message leaves fewer for them, and unused Claude Sonnet 5.5 messages don't carry over when the billing period renews.
Long Claude Sonnet 5.5 chats count more, because each Claude Sonnet 5.5 reply resends the whole conversation. Past 64k tokens a Claude Sonnet 5.5 reply counts as 2 messages, so Pro's 125 Claude Sonnet 5.5 messages become up to 62 such replies; past 128k it counts as 4 (up to 31 Claude Sonnet 5.5 replies); past 200k the Claude Sonnet 5.5 chat is full.
Claude Sonnet 5.5's native context window is 1M tokens; llmwise stops a Claude Sonnet 5.5 chat at 200k tokens, so a Claude Sonnet 5.5 chat uses at most 200k of its 1M tokens.
A Claude Sonnet 5.5 reply can run to 8,000 tokens on Pro and 16,000 on Max, Ultra, and Studio, at the same Claude Sonnet 5.5 price however long it runs.
On a paid plan each web search or link read in a Claude Sonnet 5.5 reply counts as 1 more Claude Sonnet 5.5 message.
A $10 top-up adds up to 100 more Claude Sonnet 5.5 messages, valid 12 months, spent once the plan's own Claude Sonnet 5.5 count is gone.
Claude Sonnet 5.5 replies share every plan's soft cap of 100 replies an hour with the other models.
What Claude Sonnet 5.5 reads and does
| Made by | Anthropic |
|---|---|
| Model at OpenRouter | anthropic/claude-sonnet-5.5 |
| Context window | 1M tokens |
| Longest chat in llmwise | 200k tokens |
| Images you attach | Reads them |
| PDFs you attach | Reads the whole file, charts and layout included |
| Tools (search, documents, code, apps) | Yes |
| Reasoning | On, at medium effort |
| API price, per million tokens | $2.00 in, $10.00 out |
| A typical message at API prices | $0.0150 |
| On Pro | Up to 125 a month |
Where your Claude Sonnet 5.5 messages go
A Claude Sonnet 5.5 message goes to Anthropic directly when llmwise can reach Anthropic, or through OpenRouter when it can't.
If Anthropic fails before a Claude Sonnet 5.5 reply starts (an overload, a server error, a dropped connection), llmwise resends the Claude Sonnet 5.5 request through OpenRouter, to endpoints that, according to OpenRouter, don't store prompts for their own use or train on them.
Anthropic's safety system can pass a Claude Sonnet 5.5 message to another Claude model. When it does, the reply names the model that answered and is charged that model's price, never more than Claude Sonnet 5.5's.
The Privacy Policy lists every company a Claude Sonnet 5.5 message can reach.
Claude Sonnet 5.5's API price, and what a message costs
Claude Sonnet 5.5's API price is $2.00 per million tokens in and $10.00 out: Anthropic's list price. At that price a typical Claude Sonnet 5.5 message (4,000 tokens in, 700 out) costs about $0.0150.
In llmwise a Claude Sonnet 5.5 message isn't billed by the token: it's one of up to 125 Claude Sonnet 5.5 messages a month on Pro, however long the Claude Sonnet 5.5 reply runs.
What Claude Sonnet 5.5's replies cost in our test runs, job by job, and Claude Sonnet 5.5 beside the rest of its family: Claude Sonnet 5.5 pricing: API price, cost per message and plans.
When to use Claude Sonnet 5.5, and when a cheaper model will do
llmwise's catalog describes Claude Sonnet 5.5 as “Newest Sonnet, for coding, documents and everyday work”. No benchmark scores here: ask Claude Sonnet 5.5 your own question, then switch the picker to another model in the same chat, which sees Claude Sonnet 5.5's answer too.
When a question doesn't need Claude Sonnet 5.5, these read the same attachments, whole PDFs included, and leave more of the month for Claude Sonnet 5.5:
Claude Haiku 4.5 (Anthropic): up to 250 a month on Pro, against Claude Sonnet 5.5's 125.
Gemini 3.8 Flash (Google): up to 250 a month on Pro, against Claude Sonnet 5.5's 125.
Grok 4.7 (xAI): up to 250 a month on Pro, against Claude Sonnet 5.5's 125.
GPT-6 Luna (OpenAI): 60 a day on Pro, against Claude Sonnet 5.5's 125.
Same count as Claude Sonnet 5.5 on every plan: Claude Sonnet 5, GPT-6 Sol, Gemini 3.1 Pro and Kimi K3.
Claude Sonnet 5.5 in our test runs
Claude Sonnet 5.5 passed 47 of our 50 test prompts, sent through llmwise's own pipeline and checked the same way for every model.
- Coding5 of 5 passed
- Writing4 of 5 passed
- Math5 of 5 passed
- Summarization4 of 5 passed
- Data analysis5 of 5 passed
- Customer support4 of 5 passed
- Translation5 of 5 passed
- SQL5 of 5 passed
- RAG and answering from documents5 of 5 passed
- Agents and tool use5 of 5 passed
How Claude Sonnet 5.5 began its reply to our first writing prompt, “Write a LinkedIn post of 100 to 150 words announcing that our small bakery, Crumb & Co., opens a second shop in Leeds on 14 November. Mention the free coffee…”:
We're opening a second shop, and we can hardly wait to tell you. On 14 November, Crumb & Co. is coming to Leeds. When we started out, it was a small bakery with a big oven and a simple idea: make good bread, treat people kindly, and let the rest follow. Your support over the years has made this next step possible, and we're grateful for every early morning, every loyal order and every kind word. The new shop will have the same fresh loaves, pastries and cakes you know, baked with the same care. It will be a place to pop in, say hello and take something warm home. To celebrate, we're giving away free coffee all day on opening day. Come along, bring a friend, and help us make our first day one to remember. See you in Leeds on 14 November.
Questions
Is Claude Sonnet 5.5 free in llmwise?
Claude Sonnet 5.5 is in llmwise's one-time free trial of 5 messages, with no card. After that it needs a paid plan: Pro ($20 a month) gets up to 125 Claude Sonnet 5.5 messages a month.
What are Claude Sonnet 5.5's usage limits in llmwise?
Claude Sonnet 5.5 has a published monthly count on each paid plan (up to 125 Claude Sonnet 5.5 messages a month on Pro), shared with the other models. A long Claude Sonnet 5.5 chat counts each reply as 2 Claude Sonnet 5.5 messages past 64k tokens and 4 past 128k.
What happens when my Claude Sonnet 5.5 messages run out?
Your Claude Sonnet 5.5 count resets when your billing period renews. Until then, the everyday models keep answering on their own daily count, and a $10 top-up adds up to 100 more Claude Sonnet 5.5 messages.
How much context does Claude Sonnet 5.5 have in llmwise?
1M tokens is Claude Sonnet 5.5's native context window. A Claude Sonnet 5.5 chat in llmwise stops at 200k tokens, and past 64k each Claude Sonnet 5.5 reply counts as more than one message, so a new Claude Sonnet 5.5 chat for each new task goes further.
Claude, GPT, Gemini, DeepSeek, Grok, Kimi, and GLM, in one chat.
See what a message costs before you send it. Free is 5 messages to try; sign in with an email link, no password or card.