Claude Opus 5.5 Economy

Claude Opus 5.5 Economy provides an ultra-low-cost deployment channel for Anthropic's premier Claude Opus 5.5 model architecture. Engineered to handle sustained agentic coding runs, automated multi-step tool execution, and extended long-context analytical tasks, this Economy channel is specifically optimized for maximum budget efficiency. While retaining the underlying reasoning power, adaptive thinking depth, and 1M token context capacity of Opus 5.5, it operates with dynamic stability limits and lower concurrency priority compared to the standard Official channel.

Claude Opus 5.5 Economy

Claude Opus 5.5 is Anthropic's next-generation flagship frontier model, built for extreme deep reasoning, autonomous cross-horizon agent collaboration, and end-to-end full-lifecycle systems engineering. It supports multimodal perception inputs across text, high-resolution imagery, professional documents in multiple formats, audio, and video, generating high-precision structured text outputs. Featuring an ultra-long context window of 2 million tokens and up to 256,000 output tokens, it natively integrates Extended Thinking, fine-grained tool use, and end-to-end system-level computer use capabilities. It demonstrates industry-leading reliability and execution in systems architecture design, complex mathematical and algorithmic deduction, full-stack software engineering, interdisciplinary scientific research, and high-rigor legal and financial decision-making.

Base URL

https://api.icreat.ai

Model Code

claude-opus-5-5

Authentication

All API requests must be authenticated using an API Key. You can obtain your API Key from the console.

export ICREAT_API_KEY="your-api-key-here"

HTTP Request Headers

import os

API_KEY = os.environ.get("ICREAT_API_KEY")
headers = {
    "Content-Type": "application/json",
    "Authorization": "Bearer " + API_KEY,
}

Protect Your API Key Never expose your API Key in client-side code or public repositories. Always use environment variables or a backend proxy.

Code Examples

This model is accessed via the Anthropic-compatible Messages interface and supports both streaming and non-streaming modes.

POST/v1/messages

curl --fail-with-body --connect-timeout 10 --max-time 120 \
  -X POST https://api.icreat.ai/v1/messages \
  -H "Authorization: Bearer ${ICREAT_API_KEY}" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "claude-opus-5-5",
  "max_tokens": 4096,
  "messages": [
    {"role": "user", "content": "Perform a deep formal analysis and deduction of fault-tolerance mechanisms in interdisciplinary distributed computing architectures."}
  ],
  "thinking": {
    "type": "enabled",
    "budget_tokens": 2048
  },
  "stream": false
}'

Request Parameters

The following parameters are accepted in the request body.

Total: 6 | Required: 3 | Optional: 3

modelstringrequired

The model ID used for completion. Must specify the iCreat model_code (claude-opus-5-5).

messagesarray[object]required

The list of messages comprising the conversation.

max_tokensintegerrequired

The maximum number of tokens to generate.

thinkingobject

Configuration for extended thinking mode (including type: "enabled" and budget_tokens to regulate thinking token expenditure).

temperaturenumber

Sampling temperature, 0–1. When thinking is enabled, keeping the default value of 1.0 is recommended.

streamboolean

Whether to stream back responses via Server-Sent Events (SSE).

Response Parameters

Response format compatible with the Anthropic Messages API.

Total: 6

idstring

The unique identifier for the message.

typestring

Object type, fixed as message.

rolestring

Role of the responder, fixed as assistant.

contentarray[object]

The list of output content blocks generated by the model (may contain both thinking process blocks and final text blocks).

stop_reasonstring

The reason why generation stopped.

end_turnmax_tokensstop_sequencetool_use

usageobject

Token usage statistics (including breakdowns for input, output, and thinking tokens).

LLM-Friendly Prompt

Below is an LLM-friendly Markdown prompt that can be copied into AI assistants like Cursor or ChatGPT to help them understand how to integrate, call, and configure this model via the API. Click the "Copy LLM Prompt" button or the code block below to copy the full text.

# claude-opus-5-5

> Claude Opus 5.5 is Anthropic's next-generation flagship frontier deep-reasoning foundation model.

## Overview

Execute complex logical reasoning and chat completions via the iCreat Anthropic-compatible Messages API, supporting deep Extended Thinking mode, multimodal inputs, and streaming/non-streaming responses.

## API Information

- **Base URL**: `https://api.icreat.ai`
- **Endpoint (POST)**: `/v1/messages`
- **Model ID**: `claude-opus-5-5`
- **Authentication**: `Authorization: Bearer ${ICREAT_API_KEY}`

## Calling Workflow

Single POST request; `stream: false` returns a complete JSON response, `stream: true` streams responses via SSE.

### Input Key Points

- `model` (Required): iCreat model_code `claude-opus-5-5`
- `max_tokens` (Required): Maximum output token count
- `messages` (Required): Conversation message list (role: user / assistant)
- Common Optional: `thinking` (extended deep reasoning configuration with `budget_tokens`), `stream` (streaming toggle), `system` (system prompt)

### Output Key Points

- When thinking mode is enabled, `content` may contain both `type: "thinking"` and `type: "text"` blocks
- Read the final textual output directly from the `text` field where `type: "text"`

## Notes

- `model` must use the iCreat model_code (`claude-opus-5-5`)
- All other parameters strictly adhere to the Anthropic Messages API specification