Models/anthropic

claude-sonnet-4.5· Released Sep 29, 2025

Name: claude-sonnet-4.5
Brand: anthropic

anthropic/claude-sonnet-4.5

Claude Sonnet 4.5 is Anthropic’s most advanced Sonnet model to date, optimized for real-world agents and coding workflows. It delivers state-of-the-art performance on coding benchmarks such as SWE-bench Verified, with...

Input

From$2.805/M

Output

From$14.025/M

Context

Up to 1M

Max output

Up to 64K

Modalities

TextImageFileText

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-4.5",
    "messages": [
      {"role": "user", "content": "Say hello in five words."}
    ]
  }'