Models/anthropic

claude-sonnet-4· Released May 22, 2025

Name: claude-sonnet-4
Brand: anthropic

anthropic/claude-sonnet-4

Claude Sonnet 4 significantly enhances the capabilities of its predecessor, Sonnet 3.7, excelling in both coding and reasoning tasks with improved precision and controllability. Achieving state-of-the-art performance on SWE-bench (72.7%),...

Input

From$2.805/M

Output

From$14.025/M

Context

Up to 1M

Max output

Up to 64K

Modalities

ImageTextFileText

Input and output show the lowest price across upstreams, for reference. Your actual prices are listed per upstream below.

Upstreams & pricing

Upstream	Context	Max output	Input $/1M	Output $/1M	Cached input $/1M
Zenlayer AI Gateway - anthropic (Global)From price	1M	64K	≤200K$2.805 >200K$5.61	≤200K$14.025 >200K$21.0375	≤200K$0.2805 >200K$0.561

Routed in real time — you pay the listed price of whichever upstream serves your call.

How to call

curlrequest.sh

curl https://api.tkex.ai/v1/chat/completions \
  -H "Authorization: Bearer $TX_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "anthropic/claude-sonnet-4",
    "messages": [
      {"role": "user", "content": "Say hello in five words."}
    ]
  }'