Anthropic / claude-sonnet-5-5
Claude Sonnet 5.5 stands out for Adaptive reasoning with tools, streaming, and long context. and Claude-compatible tools and streaming. It is best suited to Coding, reasoning, and long-context agent workflows. and image questions and answers.
Context
1M
token
Input
$2.00
/ 1M tokens
Output
$10.00
/ 1M tokens
Quality
#2
Elo 1470
Overview
Claude Sonnet 5.5 stands out for Adaptive reasoning with tools, streaming, and long context. and Claude-compatible tools and streaming. It is best suited to Coding, reasoning, and long-context agent workflows. and image questions and answers.
Tool calling
Can call tools or functions, so product flows can connect model output to backend actions.
Streaming
Supports streamed responses for chat, assistants, and interfaces that need visible incremental output.
Prompt cache
Supports prompt caching patterns for repeated context and longer production conversations.
Reasoning
Better suited for multi-step analysis, planning, and tasks that need deliberate reasoning.
Multimodal
Supports mixed text-image input and can use a 1M-token context window for longer material.
Model maker
Anthropic
Called through SeaLink's unified account, balance, and OpenAI-compatible API.
Protocol
OpenAI-compatible Chat Completions
Base URL: https://api.sealink.io/v1
Pricing
Light production run
100K input + 25K output
$0.45
Higher-volume run
1M input + 250K output
$4.50
The final charge follows generated usage and the applicable selector, such as resolution, duration, input type, or provider unit.
API
model
claude-sonnet-5-5base_url
https://api.sealink.io/v1Auth
Bearer $SEALINK_API_KEYcurl https://api.sealink.io/anthropic/v1/messages \-H "x-api-key: $SEALINK_API_KEY" \-H "anthropic-version: 2023-06-01" \-H "Content-Type: application/json" \-d '{"model": "claude-sonnet-5-5","max_tokens": 256,"messages": [{"role": "user", "content": "Hello."}]}'
from anthropic import Anthropicclient = Anthropic(base_url="https://api.sealink.io/anthropic",api_key="<your-sealink-key>",)message = client.messages.create(model="claude-sonnet-5-5",max_tokens=256,messages=[{"role": "user", "content": "Hello."}],)print(message.content[0].text)
import Anthropic from "@anthropic-ai/sdk";const client = new Anthropic({baseURL: "https://api.sealink.io/anthropic",apiKey: process.env.SEALINK_API_KEY,});const message = await client.messages.create({model: "claude-sonnet-5-5",max_tokens: 256,messages: [{ role: "user", content: "Hello." }],});console.log(message.id);