Claude Sonnet 4.6 API

anthropic/claude-sonnet-4.6
Claude Sonnet 4.6 is a versatile frontier‑class AI model built for real‑world use: it combines strong reasoning and coding performance with responsive latency and practical features for production deployment.
Context
200K tokens
Input
$4.1262 / 1M tokens
Output
$19.5 / 1M tokens

How to use Claude Sonnet 4.6 API

Install any OpenAI-compatible SDK, point it at api.aimlapi.com/v1, and set the model to anthropic/claude-sonnet-4.6.
import requests

r = requests.post(
    "https://api.aimlapi.com/v1/chat/completions",
    headers={"Authorization": "Bearer " + AIMLAPI_KEY},
    json={
      "model": "anthropic/claude-sonnet-4.6",
      "messages": [
        {
          "role": "user",
          "content": "Hello!"
        }
      ]
    },
)
print(r.json())
const r = await fetch("https://api.aimlapi.com/v1/chat/completions", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.AIMLAPI_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "model": "anthropic/claude-sonnet-4.6",
    "messages": [
      {
        "role": "user",
        "content": "Hello!"
      }
    ]
  }),
});
console.log(await r.json());
curl -X POST https://api.aimlapi.com/v1/chat/completions \
  -H "Authorization: Bearer $AIMLAPI_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"anthropic/claude-sonnet-4.6","messages":[{"role":"user","content":"Hello!"}]}'

OpenAI-compatible — swap the base URL and it works with your existing SDK.

Claude Sonnet 4.6 API Pricing

TypePrice
Input
$4.1262 / 1M tokens
Output
$19.5 / 1M tokens
Cached input
$0.41262 / 1M tokens

Claude Sonnet 4.6 Benchmarks

BenchmarkScoreWhat it measuresSourceRetrieved
OSWorld
72.5%
Computer-use across real desktop applicationsSourceJuly 8, 2026
SWE-bench Verified
79.6%
Resolving verified real GitHub issuesSourceJuly 8, 2026
Intelligence
30.5
Composite score across standardised reasoning, knowledge and problem-solving evaluations, measured independently by Artificial AnalysisSourceSeptember 12, 2026
Coding
63
Composite score across standardised coding evaluations, measured independently by Artificial AnalysisSourceSeptember 12, 2026

Claude Sonnet 4.6 vs other models

ModelInputOutputContextBest for
$4.1262 / 1M tokens
$19.5 / 1M tokens
200K tokens
Chat + assistants
$6.5 / 1M tokens
$39 / 1M tokens
1.05M tokens
Reasoning + agents
$2.6 / 1M tokens
$13 / 1M tokens
1M tokens
Balanced coding + agents
$3.9 / 1M tokens
$19.5 / 1M tokens
1M tokens
Long-context, multimodal & agentic workflows
$0.65 / 1M tokens
$3.9 / 1M tokens
1.05M tokens
Reasoning + agents

Frequently asked questions

Claude Sonnet 4.6 has a 200,000 tokens context window and can return up to 64,000 tokens.

Claude Sonnet 4.6 takes text as input and returns text.

Use anthropic/claude-sonnet-4.6 as the model id. Requests go to https://api.aimlapi.com/v1/chat/completions.

Claude Sonnet 4.6 is priced at input $4.1262 / 1M tokens, output $19.5 / 1M tokens, cached input $0.41262 / 1M tokens.

Yes, Claude Sonnet 4.6 can stream responses as they are generated.

Claude Sonnet 4.6 was built by Anthropic.

Start building with Claude Sonnet 4.6

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