# Claude Sonnet 5.5 API pricing Claude Sonnet 5.5 is one of Anthropic's newest models. It costs $2 per million tokens it reads and $10 per million it writes, $4 on a mix of 3 read for each 1 written. Below are every price Anthropic lists for it, what 8 everyday jobs cost a month on it, and the models that do as well for less. - Page: https://tecyfy.com/prices/claude-sonnet-5-5 - Maker: Anthropic ## Price per million tokens, in US dollars | | Price | | --- | --: | | Input | $2 | | Cached input | $0.10 | | Cache write | $2.50 | | Output | $10 | | Blend, 3 read for each 1 written | $4 | | Batch input | $1 | | Batch output | $5 | | Context window, tokens | 1M | | Longest answer, tokens | 128K | | Capability score (Epoch Capabilities Index; GPT-5 is 150) | 164 | Price change: Cached input went from $0.20 to $0.10 per million tokens. The price of a cache write did not change. ## What 8 everyday jobs cost a month Each job at its usual runs a day, for 30 days, at the standard price. | Job | Tokens in, out, runs a day | A run | A month | | --- | --- | --: | --: | | A chat question | 300, 500, 100 | 0.56 cents | $16.80 | | A hard question, with thinking | 300, 1,400, 100 | 1.5 cents | $43.80 | | A long report, summarised | 60,000, 2,000, 20 | 14 cents | $84.00 | | A 40-turn agent task | 2,800,000, 40,000, 10 | $1.21 | $364 | | A support bot's reply | 4,000, 300, 2,000 | 0.72 cents | $432 | | Sort a message into a category | 250, 5, 50,000 | 0.055 cents | $825 | | Read an invoice into fields | 1,500, 250, 1,000 | 0.55 cents | $165 | | Review a pull request | 25,000, 4,500, 50 | 9.5 cents | $143 | ## Cheaper models that score as well as Claude Sonnet 5.5 None of the newest models that scores about as well costs less on a mix of 3 tokens read for each 1 written. ## Questions ### How much does Claude Sonnet 5.5 cost? Claude Sonnet 5.5 costs $2 per million input tokens, the text it reads, and $10 per million output tokens, the text it writes, thinking included. On a mix of 3 tokens read for each 1 written, that is $4 per million. ### How much does cached input cost on Claude Sonnet 5.5? Text Claude Sonnet 5.5 reads again from the cache costs $0.10 per million tokens, against $2 the first time. Putting text in the cache costs $2.50 per million, so a long prompt sent again and again costs far less after the first time. ### Does Claude Sonnet 5.5 have a batch price? Yes. With a batch, where you send many requests and collect the answers later instead of at once, Claude Sonnet 5.5 costs $1 per million tokens read and $5 per million written. ### What is the context window of Claude Sonnet 5.5? Claude Sonnet 5.5 holds 1M tokens at once, about 1,500 pages of English text, and writes up to 128K tokens in one answer. The window holds your instructions, the files you attach, the conversation so far and the answer. ### How good is Claude Sonnet 5.5? Claude Sonnet 5.5 scores 164 on the Epoch Capabilities Index, an independent score from Epoch AI that combines over 50 benchmarks, with a range of doubt from 161 to 168 (GPT-5 is 150). One score is an average; test it on 10 tasks of your own. ### Is there a cheaper model as good as Claude Sonnet 5.5? Not among the newest models we list: none that scores about as well on the Epoch Capabilities Index costs less on a mix of 3 tokens read for each 1 written. ### Where does Claude Sonnet 5.5 rank on price? Claude Sonnet 5.5 is the 10th cheapest of the 16 newest models we list, by the price of 3 tokens read for each 1 written. ### What does a support bot cost a month on Claude Sonnet 5.5? At 2,000 replies a day, each reading 4,000 tokens (50 percent of them from cache) and writing 300, a support bot costs 0.72 cents a reply on Claude Sonnet 5.5, $432 a month. ### What does an AI agent task cost on Claude Sonnet 5.5? One 40-turn task that reads 2,800,000 tokens in all, 90 percent of them from cache, and writes 40,000, costs $1.21 on Claude Sonnet 5.5. At 10 tasks a day that is $364 a month. ## Sources - [Anthropic: API prices](https://platform.claude.com/docs/en/about-claude/pricing) - [Epoch Capabilities Index, by Epoch AI (CC BY 4.0)](https://epoch.ai/benchmarks/eci) - Every model's prices as [JSON](https://tecyfy.com/prices.json) or [CSV](https://tecyfy.com/prices.csv), free to use ## Compare - [Claude Mythos 5.1 vs Claude Sonnet 5.5](https://tecyfy.com/prices/compare/claude-mythos-5-1-vs-claude-sonnet-5-5.md) - [Claude Fable 5 vs Claude Sonnet 5.5](https://tecyfy.com/prices/compare/claude-fable-5-vs-claude-sonnet-5-5.md) - [Claude Mythos 5 vs Claude Sonnet 5.5](https://tecyfy.com/prices/compare/claude-mythos-5-vs-claude-sonnet-5-5.md) - [Claude Opus 5 vs Claude Sonnet 5.5](https://tecyfy.com/prices/compare/claude-opus-5-vs-claude-sonnet-5-5.md) - [Claude Opus 4.8 vs Claude Sonnet 5.5](https://tecyfy.com/prices/compare/claude-opus-4-8-vs-claude-sonnet-5-5.md) - [Claude Opus 4.7 vs Claude Sonnet 5.5](https://tecyfy.com/prices/compare/claude-opus-4-7-vs-claude-sonnet-5-5.md) - [Claude Opus 4.6 vs Claude Sonnet 5.5](https://tecyfy.com/prices/compare/claude-opus-4-6-vs-claude-sonnet-5-5.md) - [Claude Opus 4.5 vs Claude Sonnet 5.5](https://tecyfy.com/prices/compare/claude-opus-4-5-vs-claude-sonnet-5-5.md) ## Anthropic's other models - [Claude Fable 5.1](https://tecyfy.com/prices/claude-fable-5-1.md) - [Claude Opus 5.5](https://tecyfy.com/prices/claude-opus-5-5.md) - [Claude Haiku 5.5](https://tecyfy.com/prices/claude-haiku-5-5.md) - [Claude Mythos 5.1](https://tecyfy.com/prices/claude-mythos-5-1.md) - [Claude Fable 5](https://tecyfy.com/prices/claude-fable-5.md) - [Claude Mythos 5](https://tecyfy.com/prices/claude-mythos-5.md) - [Claude Opus 5](https://tecyfy.com/prices/claude-opus-5.md) - [Claude Opus 4.8](https://tecyfy.com/prices/claude-opus-4-8.md) - [Claude Opus 4.7](https://tecyfy.com/prices/claude-opus-4-7.md) - [Claude Opus 4.6](https://tecyfy.com/prices/claude-opus-4-6.md) - [Claude Opus 4.5](https://tecyfy.com/prices/claude-opus-4-5.md) - [Claude Sonnet 5](https://tecyfy.com/prices/claude-sonnet-5.md) - [Claude Sonnet 4.6](https://tecyfy.com/prices/claude-sonnet-4-6.md) - [Claude Sonnet 4.5](https://tecyfy.com/prices/claude-sonnet-4-5.md) - [Claude Haiku 4.5](https://tecyfy.com/prices/claude-haiku-4-5.md)