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Claude Sonnet 5.5 API: toman pricing and code

anthropic/claude-sonnet-5.5

Image inputTool callingReasoningJSON outputFile input
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Input · per 1M tokens
692,439 toman
Output · per 1M tokens
3,462,194 toman
One 1,000-word request ≈
5,401 toman

You are billed for the usage the request actually reported. Prices follow the market. Cached input: 34,622 toman per 1M tokens. Web search: 3,462.19 toman per request.Pricing and top-ups

Claude Sonnet 5.5 example: reading an image into JSON

The example is picked from this model's own capabilities. Drop in your key and it runs as is.

# tip: a data URI works too — base64 the file and prefix it with data:image/jpeg;base64,
curl https://api.uttapen.ir/v1/chat/completions \
  -H "Authorization: Bearer sk-up-…" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "anthropic/claude-sonnet-5.5",
    "messages": [{
      "role": "user",
      "content": [
        {"type": "text", "text": "Return only the invoice number and the total, as JSON."},
        {"type": "image_url", "image_url": {"url": "https://example.com/factor.jpg"}}
      ]
    }]
  }'
import base64, json
from openai import OpenAI

client = OpenAI(base_url="https://api.uttapen.ir/v1", api_key="sk-up-…")

img = base64.b64encode(open("factor.jpg", "rb").read()).decode()

resp = client.chat.completions.create(
    model="anthropic/claude-sonnet-5.5",
    messages=[{
        "role": "user",
        "content": [
            {"type": "text", "text": "Return the invoice number, the date and the total as JSON."},
            {"type": "image_url", "image_url": {"url": f"data:image/jpeg;base64,{img}"}},
        ],
    }],
    response_format={"type": "json_object"},
)
print(json.loads(resp.choices[0].message.content))
import OpenAI from "openai";
import { readFileSync } from "node:fs";

const client = new OpenAI({ baseURL: "https://api.uttapen.ir/v1", apiKey: "sk-up-…" });
const img = readFileSync("factor.jpg").toString("base64");

const resp = await client.chat.completions.create({
  model: "anthropic/claude-sonnet-5.5",
  messages: [{
    role: "user",
    content: [
      { type: "text", text: "Return the invoice number, the date and the total as JSON." },
      { type: "image_url", image_url: { url: `data:image/jpeg;base64,${img}` } },
    ],
  }],
  response_format: { type: "json_object" },
});
console.log(JSON.parse(resp.choices[0].message.content));

What is Claude Sonnet 5.5 good for?

Claude Sonnet 5.5 is one of Anthropic's models. Put "anthropic/claude-sonnet-5.5" in the model field and the rest of your code stays as it is. Claude Sonnet 5.5 keeps 1,000,000 tokens in view at once, and that number is what caps the conversation history in your product. A single response can run to 128,000 tokens. On price it sits in the "expensive" band — cheaper than 52 and dearer than 319 of the other paid models in the catalogue.

What you get on top of text in, text out: it reads images directly, which makes it a real option for invoices, forms and screenshots; it takes files such as PDFs as input; it supports tool calling, so it can invoke your own functions with valid arguments; it returns schema-valid JSON through response_format, ready to hand to your code; it has a reasoning mode that pays off on multi-step problems, maths and debugging. All of it works through the standard parameters of the official OpenAI SDK — no custom client, no wrapper. Keep in mind that reasoning tokens are output tokens and do appear on the bill.

Input runs at 692,439 toman per 1M tokens and output at 3,462,194 — output costs 5× input, so trimming the answer saves more than trimming the prompt. It supports cached input: repeated context is billed at 34,622 toman per 1M, which matters a lot if your system prompt is long. You are always charged for the usage the request actually reported, never for the estimate, and a failed request costs nothing.

The closest alternative with the same capabilities from a different provider is Gemini 2.5 Pro: Claude Sonnet 5.5 works out about 10% more expensive, and its context window is smaller. Both run on the same key and the same code, so trying the other one is a single string change.

To make the figure concrete: 100,000 toman of credit buys roughly 19 thousand-word requests on Claude Sonnet 5.5, and every 1,000 toman is about 185 words of round trip. A job with one million input tokens and one million output tokens comes to 4,154,632 toman in total. Filling this model's 1,000,000-token window costs 692,439 toman on the input side alone, which is the real reason to keep conversation history short.

This id gets confused with "anthropic/claude-sonnet-5.5:batch", because the underlying model is the same. The difference is the suffix: no suffix (the standard variant) against "batch". On a thousand-word request this variant works out about 2× more expensive (5,401 against 2,701 toman). On parameters, this one takes max_completion_tokens.

Anthropic has 24 models in our catalogue; the cheapest is Claude Haiku 5.5 (batch) at 135 toman per thousand words and the dearest Claude Opus 4.1 at 40,508. Among the less common parameters it accepts max_completion_tokens, reasoning_effort, verbosity — all through the standard request body. It does not support temperature, top_p, seed, which most models here do, so test before switching if your code relies on them. By context size the nearest option from another provider is Nova 2 Lite at 1,000,000 tokens.

Where it makes sense: work where the quality of the answer matters more than its cost, logic puzzles and code review, pulling text and fields out of images, agents that reach out to APIs and databases, extracting data against a fixed schema, analysing a long document or codebase in one request.

Provider's own description

Claude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, succeeding Claude Sonnet 5 as a direct upgrade. It is especially strong at building features, fixing bugs, and producing...

Three real jobs, priced on this model

Each figure is derived from the prices above and moves when they do.

JobTokensCost
One chat turn with a medium history1,500 in + 400 out2,424 toman
Summarising a ten-page document4,000 in + 600 out4,847 toman
Classifying a thousand short rows120,000 in + 20,000 out152,337 toman

Other variants of this model

Same core model, different execution terms and different price. This page is the standard variant.

VariantModel idOutput / 1MContext
batchanthropic/claude-sonnet-5.5:batch1,731,0971,000,000

Put the variant's id verbatim in the model field; nothing else in your code changes.

Price history

DateInput (toman/1M)Output (toman/1M)
8 Oct 2026692,4393,462,194
28 Sep 2026692,4393,462,194

Every price change for this model is recorded. Toman figures use today's rate.

Frequently asked

How do I call Claude Sonnet 5.5 from Iran?
Sign up with your mobile number, top the wallet up in toman, create an API key, then in the official OpenAI SDK point base_url at https://api.uttapen.ir/v1 and set model to "anthropic/claude-sonnet-5.5". Nothing else in your code changes.
What does Claude Sonnet 5.5 cost in toman?
692,439 toman per 1M input tokens and 3,462,194 toman per 1M output tokens; a 1,000-word request is around 5,401 toman. You pay for the usage that request actually reported, and a failed request costs nothing.
How much input does Claude Sonnet 5.5 take?
Up to 1,000,000 tokens per request, roughly 750k words. A single answer can reach 128,000 tokens.
Does Claude Sonnet 5.5 support streaming and tool calling?
Streaming (stream=true) works on every model here. This one supports tool calling in the standard OpenAI shape. Image input is accepted through image_url, as a data URI or a public URL. Structured output through response_format works too.