Claude Sonnet 5 · orcarouter

Claude Sonnet 5 is Anthropic's most capable Sonnet-class model — frontier-level performance across coding, agentic workflows, and professional knowledge work, at a fraction of the cost of the Opus tier. It serves a 1M-token context window with up to 128K output tokens, accepts text, image, and file inputs with text output, and supports adaptive thinking with selectable reasoning effort (low, medium, high, max) so callers can dial the intelligence / latency / cost tradeoff per request. Built as Anthropic's most agentic Sonnet yet, it posts large gains over Sonnet 4.6 on agentic coding and computer-use and closes much of the gap to Opus 4.8 — 63.2% on SWE-bench Pro, 80.4% on Terminal-Bench 2.1, and 81.2% on OSWorld-Verified — while pricing well below Opus 4.8, GPT-5.5, and Gemini 3.1 Pro. It is a strong default for cost-sensitive agents, coding assistants, and high-volume production workloads that still demand frontier reasoning.

Base model All models on this base All models of the provider to the provider

Input, $/1M $2.00

Output, $/1M $10.00

Cache read $0.20

Cache write $2.50

Context 1 000 000

Max output 128 000

Accepts application/pdf, image/gif, image/jpeg, image/png, image/webp, text

Last checked 04.11.2026 12:26:37 UTC

Source provider's page

Price alerts

API

OpenAI-compatible API: the official OpenAI SDKs work with this base URL. Replace YOUR_API_KEY with your key from the provider.

API base URL	`https://api.orcarouter.ai/v1`
Endpoint	`https://api.orcarouter.ai/v1/chat/completions`
Model id	`anthropic/claude-sonnet-5`

curl

curl https://api.orcarouter.ai/v1/chat/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "anthropic/claude-sonnet-5", "messages": [{"role": "user", "content": "Hello!"}], "max_tokens": 256}'

Python

import requests

r = requests.post(
    "https://api.orcarouter.ai/v1/chat/completions",
    headers={"Authorization": "Bearer YOUR_API_KEY"},
    json={
      "model": "anthropic/claude-sonnet-5",
      "messages": [
        {
          "role": "user",
          "content": "Hello!"
        }
      ],
      "max_tokens": 256
    },
)
print(r.json())

JavaScript

const r = await fetch("https://api.orcarouter.ai/v1/chat/completions", {
  method: "POST",
  headers: {Authorization: "Bearer YOUR_API_KEY", "Content-Type": "application/json"},
  body: JSON.stringify({
    "model": "anthropic/claude-sonnet-5",
    "messages": [
      {
        "role": "user",
        "content": "Hello!"
      }
    ],
    "max_tokens": 256
  }),
});
console.log(await r.json());

Request (JSON)

{
  "model": "anthropic/claude-sonnet-5",
  "messages": [
    {
      "role": "user",
      "content": "Hello!"
    }
  ],
  "max_tokens": 256
}

Response (JSON)

{
  "id": "chatcmpl-...",
  "object": "chat.completion",
  "model": "anthropic/claude-sonnet-5",
  "choices": [
    {
      "index": 0,
      "message": {
        "role": "assistant",
        "content": "Hi! How can I help?"
      },
      "finish_reason": "stop"
    }
  ],
  "usage": {
    "prompt_tokens": 9,
    "completion_tokens": 12,
    "total_tokens": 21
  }
}

The address is taken from the provider's model list; check it against the provider's documentation.

Provider's API documentation

Source: AI Rate Card, https://airatecard.com/en/c/offer%3Aorcarouter%7Canthropic/claude-sonnet-5, prices checked 2026-11-04; seller's page: https://orcarouter.ai/models/anthropic/claude-sonnet-5

Technical details

ID: offer:orcarouter|anthropic/claude-sonnet-5