Cheaper Claude Sonnet 4.6 API Pricing in 2026

Updated 2026-06-23

Claude Sonnet 4.6 is available through APIsRouter. Set your SDK Base URL to https://api.apisrouter.com/v1, use model ID claude-sonnet-4-6, and inspect usage, cost, and errors in the console.

API base URLhttps://api.apisrouter.com/v1
InterfaceOpenAI-compatible /v1
BillingPay as you go
Use casemodel API
Model IDclaude-sonnet-4-6
Display nameClaude Sonnet 4.6
Context1M
APIsRouter price$2.4 input / $12 output per 1M tokens

When to use this model

Claude Sonnet 4.6 can be called through the same OpenAI-compatible APIsRouter key used for other text and image models. Keep the Base URL fixed and switch only the model field when testing alternatives.

  • Useful for agent tools, coding workflows, internal applications, and API experiments.
  • Request logs show token usage, cost, latency, and sanitized errors.
  • Use the model catalog and pricing page as the source of truth for availability and billing.

OpenAI SDK example

Fill Base URL at /v1 and put the model ID in the model field.

from openai import OpenAI

client = OpenAI(
    api_key="sk-...",
    base_url="https://api.apisrouter.com/v1",
)

response = client.chat.completions.create(
    model="claude-sonnet-4-6",
    messages=[{"role": "user", "content": "Reply with one sentence if the connection works."}],
)

print(response.choices[0].message.content)

FAQ

What is the model ID for Claude Sonnet 4.6?

Use claude-sonnet-4-6. Model IDs are case-sensitive, so copying from the model catalog is safest.

How is Claude Sonnet 4.6 billed?

Billing follows the live pricing page and request logs. Token models are charged by input/output/cache usage; image models are charged per request.

Do I need a separate API key for Claude Sonnet 4.6?

No. One APIsRouter key can call available text and image models unless you explicitly restrict that key.