Hormouz AIHormouzSign in

Anthropic: Claude Sonnet 5.5: AI model

Claude Sonnet 5.5 is the Sonnet-class model for well-scoped everyday work from Anthropic with a 1M-token context window. Reachable from inside Iran through Hormouz.

Context window:
1,000,000 tokens
Input:
$2/1M tokens
Output:
$10/1M tokens
Type:
text, image
  • Vision
  • Tools
  • Streaming
  • Long context
Good for:Popular for Health · #2Popular for Finance · #5Popular for Technology · #12Popular for Marketing & SEO · #15Ranks are based on global usage data

Thinking levels: Always thinks · max · xhigh · high · medium · low

Claude Sonnet 5.5 is Anthropic's mid-tier Claude model and a direct upgrade over Claude Sonnet 5. It is strongest at building features, fixing bugs and turning out polished documents, slides and spreadsheets, and it explains its work more clearly than the model it replaces. It sits between the faster Haiku tier and the more capable Opus tier, which makes it the usual default for day-to-day engineering and office work.

It accepts text, image and file (PDF) input and returns text, and supports tool calling, structured JSON output and streaming. It always reasons before answering, and you choose how hard it thinks with the reasoning effort setting. Claude Sonnet 5.5 is commonly used for feature development, bug fixing, code review, writing documents, slides and spreadsheets, and everyday agent loops. Hormouz serves it behind an OpenAI-compatible API: point your base URL at Hormouz, drop in a Hormouz key, and existing OpenAI SDK code runs without changes.

Pricing is usage-based: $2 per million input tokens and $10 per million output tokens. There is no fixed monthly fee, and you pay only for the tokens you use. Hormouz provides stable access to the model from inside Iran, with no foreign credit card or circumvention tooling required.

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...

Quickstart

curl https://api.hormouz.net/v1/chat/completions \
  -H "Authorization: Bearer ng-YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "anthropic/claude-sonnet-5.5",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

Specs

VendorAnthropic
TypeText, Image
Context window1,000,000 tokens
Pricing$2.00/M in · $10.00/M out
APIChat Completions
CapabilitiesStreaming · Vision · Tools

Benchmarks

56
Intelligence Index
Better than 99% of models we compared

Reasoning

HLE
Humanity's Last Exam
55%
AA-LCR
Long-context reasoning
82.7%
CritPt
Research-level physics reasoning
31.4%
AA Omniscience
Broad factual knowledge accuracy
53.9%
Non-Hallucination
Rate of avoiding fabricated answers
53%

Coding

SciCode
Python for scientific computing
61%

Agentic

GDPval
Economically valuable tasks
67%

Source: Artificial Analysis

Design Arena

How Design Arena works ↗
UI Component
Top 1%
1,400Elo
Win rate: 66.7%Avg time: 200s

Metrics sourced from Design Arena

Code example

cURL
curl https://api.hormouz.net/v1/chat/completions \
  -H "Authorization: Bearer ng-YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "anthropic/claude-sonnet-5.5",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'
Python
from openai import OpenAI
client = OpenAI(api_key="ng-YOUR_API_KEY", base_url="https://api.hormouz.net/v1")
response = client.chat.completions.create(
    model="anthropic/claude-sonnet-5.5",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(response.choices[0].message.content)
JavaScript
import OpenAI from "openai";
const client = new OpenAI({ apiKey: "ng-YOUR_API_KEY", baseURL: "https://api.hormouz.net/v1" });
const response = await client.chat.completions.create({
  model: "anthropic/claude-sonnet-5.5",
  messages: [{ role: "user", content: "Hello!" }],
});
console.log(response.choices[0].message.content);

Buy the Anthropic: Claude Sonnet 5.5 API, paid in rial

  • Buy credit with an Iranian bank card; no foreign card or account needed.
  • One Hormouz key reaches Anthropic: Claude Sonnet 5.5 and 600+ other models, and you pay only for what you use.
  • No VPN and no risk of a banned account; just change the base URL to api.hormouz.net/v1.
Create an accountBuy Claude API access, paid in rial

Use via Hormouz

Connect to this model and 600+ others with one API key, then see usage down to each request.

Request company access

FAQ

How much does Claude Sonnet 5.5 cost?
Pricing is usage-based: $2 per million input tokens and $10 per million output tokens. There is no fixed monthly fee, and you pay only for the tokens you use.
How do I access Claude Sonnet 5.5 from inside Iran?
Create an account on Hormouz and generate an API key. Hormouz provides a stable path to the model from inside Iran, with no foreign credit card or circumvention tooling required.
Is Claude Sonnet 5.5 compatible with OpenAI code?
Yes. Hormouz exposes an OpenAI-compatible API. Point your base URL at Hormouz and swap in your Hormouz key. Your existing SDKs and code run without a rewrite.
What context window and capabilities does Claude Sonnet 5.5 have?
It has a 1M-token context window, accepts text, image and file (PDF) input, and supports tool calling, structured JSON output and streaming. It always reasons before answering, and you choose how hard it thinks with the reasoning effort setting.
What is Claude Sonnet 5.5 good for?
Typical uses are feature development, bug fixing, code review, writing documents, slides and spreadsheets, and everyday agent loops.
Claude Sonnet 5.5 or Claude Opus 5.5: which should I use?
Opus 5.5 is the stronger model for the hardest reasoning, large codebases and long agent runs. Sonnet 5.5 costs half as much and is the better fit for well-scoped daily work where speed and price matter.

Updated 2026-10-13