Models/anthropic

claude-sonnet-5· Released Jun 30, 2026

anthropic/claude-sonnet-5

Sonnet 5 is Anthropic's most capable Sonnet-class model, with frontier performance across coding, agents, and professional work. It supports adaptive thinking with selectable reasoning effort levels (low, medium, high, max,...

Input
From$1.87/M
Output
From$9.35/M
Context
Up to 1M
Max output
Up to 128K
Modalities
TextImageFileText

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

Upstreams & pricing
UpstreamContextMax outputInput $/1MOutput $/1MCached input $/1M
Zenlayer AI Gateway - anthropic (Global)From price
1M128K
$1.87
$9.35
$0.187

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-5",
    "messages": [
      {"role": "user", "content": "Say hello in five words."}
    ]
  }'