Claude Mythos 5 API pricing
Claude Mythos 5 is an earlier Anthropic model, still sold. It costs $10 per million tokens it reads and $50 per million it writes, $20 on a mix of 3 read for each 1 written. Anthropic's newest models are Claude Fable 5.1, Claude Opus 5.5, Claude Sonnet 5.5 and Claude Haiku 5.5. Below are every price Anthropic lists for it, and what 8 everyday jobs cost a month on it.
- Input
- $10 per million tokens read
- Output
- $50 per million tokens written
- On everyday work
- $20 per million, 3 read for each 1 written
- Context window
- 1M tokens at once
- Capability score
- No independent score yet
Every Claude Mythos 5 price, per million tokens
In US dollars, as Anthropic prints them on its price page.
| InputTokens the model reads | $10 |
|---|---|
| Cached inputRead again from the cache | $1 |
| Cache writePutting text in the cache | $12.50 |
| OutputTokens it writes, thinking included | $50 |
| Blend 3:13 tokens read for each 1 written | $20 |
| Batch inputAnswers collected later | $5 |
| Batch output | $25 |
| Context windowTokens it holds at once | 1M tokens |
| Longest answerTokens it writes in 1 reply | 128K tokens |
What 8 everyday jobs cost a month on Claude Mythos 5
Each job at its usual number of runs a day, for 30 days, at the standard price. Open any job in the cost calculator to change its size, or to set it beside every other model.
| Job | A run | A month |
|---|---|---|
| A chat question300 in, 500 out, 100 a day | 2.8 cents | $84.00 |
| A hard question, with thinking300 in, 1,400 out, 100 a day | 7.3 cents | $219 |
| A long report, summarised60,000 in, 2,000 out, 20 a day | 70 cents | $420 |
| A 40-turn agent task2,800,000 in, 40,000 out, 10 a day | $7.32 | $2,196 |
| A support bot's reply4,000 in, 300 out, 2,000 a day | 3.7 cents | $2,220 |
| Sort a message into a category250 in, 5 out, 50,000 a day | 0.27 cents | $4,125 |
| Read an invoice into fields1,500 in, 250 out, 1,000 a day | 2.8 cents | $825 |
| Review a pull request25,000 in, 4,500 out, 50 a day | 48 cents | $713 |
Compare Claude Mythos 5
Both price lists side by side, and what the same 8 jobs cost on each.
Put this price on your own site
Writing about Claude Mythos 5? Copy the code into your post, docs or course page and show its price as a small card. The card reads the same prices as this page, so when Claude Mythos 5's price changes here it changes on your page too, and you never publish an old figure. It is free and needs no account.
The short script at the end lets the frame take the card's height. Where a page cannot take scripts, choose a fixed height.
<iframe src="https://tecyfy.com/embed/model/claude-mythos-5" title="Claude Mythos 5 API price" width="100%" height="290" style="border:0;display:block" loading="lazy" allow="clipboard-write"></iframe>
<p><a href="https://tecyfy.com/prices/claude-mythos-5">Claude Mythos 5 API price</a> by Tecyfy</p>
<script>addEventListener("message",function(e){if(e.origin!=="https://tecyfy.com"||!e.data||e.data.type!=="tecyfy:height")return;var h=Number(e.data.height);if(!(h>0))return;document.querySelectorAll("iframe").forEach(function(f){if(f.contentWindow===e.source)f.style.height=Math.min(h,20000)+"px"})})</script>How to read a model's prices
Every maker prints 2 main prices: one for the tokens a model reads (input) and one for the tokens it writes (output), each per million tokens. Writing costs more on almost every model, so a job that reads a long document and writes a line pays mostly the input price, and a chat that writes paragraphs pays mostly the output price. The blend, 3 tokens read for each 1 written, is one figure for ranking models on everyday work.
The other prices lower or raise the bill. Text read again from a cache costs a fraction of the input price, so a long system prompt or document sent with every request gets cheaper after the first. Work that can wait a day costs about half on a batch where the maker offers one. Some models charge more for every token once a prompt passes a set length.
Thinking is billed as output, and the same text is not the same number of tokens on every model, so the price per token is only the start. Each job below is priced the way the cost calculator prices it, at its usual runs a day for 30 days; open one to change its size, or compare the model with another side by side.
Questions
- How much does Claude Mythos 5 cost?
- Claude Mythos 5 costs $10 per million input tokens, the text it reads, and $50 per million output tokens, the text it writes, thinking included. On a mix of 3 tokens read for each 1 written, that is $20 per million.
- How much does cached input cost on Claude Mythos 5?
- Text Claude Mythos 5 reads again from the cache costs $1 per million tokens, against $10 the first time. Putting text in the cache costs $12.50 per million, so a long prompt sent again and again costs far less after the first time.
- Does Claude Mythos 5 have a batch price?
- Yes. With a batch, where you send many requests and collect the answers later instead of at once, Claude Mythos 5 costs $5 per million tokens read and $25 per million written.
- What is the context window of Claude Mythos 5?
- Claude Mythos 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 Mythos 5?
- Epoch AI has no independent score for Claude Mythos 5 yet. Run the same 10 tasks of your own on it and on a model you know, and compare the answers and the bills.
- Should I still use Claude Mythos 5?
- It is still sold, so it keeps working, but Anthropic's newest models are Claude Fable 5.1, Claude Opus 5.5, Claude Sonnet 5.5 and Claude Haiku 5.5. Compare its price with theirs below, and run your own tasks on the newer model before you move.
- What does a support bot cost a month on Claude Mythos 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 3.7 cents a reply on Claude Mythos 5, $2,220 a month.
- What does an AI agent task cost on Claude Mythos 5?
- One 40-turn task that reads 2,800,000 tokens in all, 90 percent of them from cache, and writes 40,000, costs $7.32 on Claude Mythos 5. At 10 tasks a day that is $2,196 a month.
Sources