Anthropic: Claude Opus 5.5: AI model
Claude Opus 5.5 is Anthropic's flagship model for hard reasoning, coding and long agent work from Anthropic with a 1M-token context window. Reachable from inside Iran through Hormouz.
- Context window:
- 1,000,000 tokens
- Input:
- $4/1M tokens
- Output:
- $20/1M tokens
- Type:
- text, image
- Vision
- Tools
- Streaming
- Long context
Thinking levels: Always thinks · max · xhigh · high · medium · low
Claude Opus 5.5 is the top Claude model and the successor to Claude Opus 5. It is strongest at multi-step changes across large codebases, code review and bug hunting, financial and scientific analysis, and reading dense charts, diagrams and screenshots. It finishes comparable tasks in fewer steps and tokens than Opus 5, reports on its work in plainer language, and is more careful to state only figures and sources it can back up.
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 Opus 5.5 is commonly used for large-codebase engineering, code review, long-running agents, financial and scientific analysis, and reading complex visuals. 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: $4 per million input tokens and $20 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 Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5. It is particularly strong at multi-step changes in large codebases, code...
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-opus-5.5",
"messages": [{"role": "user", "content": "Hello!"}]
}'Specs
| Vendor | Anthropic |
|---|---|
| Type | Text, Image |
| Context window | 1,000,000 tokens |
| Pricing | $4.00/M in · $20.00/M out |
| API | Chat Completions |
| Capabilities | Streaming · Vision · Tools |
Benchmarks
Reasoning
Coding
Agentic
Source: Artificial Analysis
Design Arena
How Design Arena works ↗Metrics sourced from Design Arena
Code example
curl https://api.hormouz.net/v1/chat/completions \
-H "Authorization: Bearer ng-YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "anthropic/claude-opus-5.5",
"messages": [{"role": "user", "content": "Hello!"}]
}'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-opus-5.5",
messages=[{"role": "user", "content": "Hello!"}],
)
print(response.choices[0].message.content)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-opus-5.5",
messages: [{ role: "user", content: "Hello!" }],
});
console.log(response.choices[0].message.content);Buy the Anthropic: Claude Opus 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 Opus 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.
Use via Hormouz
Connect to this model and 600+ others with one API key, then see usage down to each request.
Request company accessFAQ
- How much does Claude Opus 5.5 cost?
- Pricing is usage-based: $4 per million input tokens and $20 per million output tokens. There is no fixed monthly fee, and you pay only for the tokens you use.
- How do I access Claude Opus 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 Opus 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 Opus 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 Opus 5.5 good for?
- Typical uses are large-codebase engineering, code review, long-running agents, financial and scientific analysis, and reading complex visuals.
- Claude Opus 5.5 or Claude Fable 5.1: which should I use?
- Opus 5.5 is Anthropic's flagship for the hardest reasoning and long agent work. Fable 5.1 is strong at long refactors, front-end code and knowledge work; test both on your own tasks, and compare their prices on each model's page.
Updated 2026-10-13