Claude Opus 4.8 API

US Anthropic | released 2026-06 | knowledge cutoff 2026-04

Claude Opus 4.8 is Anthropic’s frontier model, delivering the deepest reasoning and best writing quality in the Claude family. Reserved for the hardest analytical, legal, and research tasks where quality outweighs cost.

ImageReasoningTool UseJSON ModeFlagship

Pricing (official list, per 1M tokens)

Input

$5.00/M

Output

$25.00/M

Specifications

Context window1000K tokens Max output32K tokens Input modalitiesImage StreamingYes APIOpenAI-compatible

How to use Claude Opus 4.8

Drop-in OpenAI replacement. Change only the base_url and model.

# Python -pip install openai
from openai import OpenAI

client = OpenAI(
    base_url="https://meshtok.com/v1",
    api_key="sk-your-MeshTok-key",
)

resp = client.chat.completions.create(
    model="anthropic/claude-opus-4.8",
    messages=[{"role":"user","content":"Hello!"}],
)
print(resp.choices[0].message.content)

# cURL
curl https://meshtok.com/v1/chat/completions \
  -H "Authorization: Bearer sk-your-MeshTok-key" \
  -H "Content-Type: application/json" \
  -d '{"model":"anthropic/claude-opus-4.8","messages":[{"role":"user","content":"Hello!"}]}'