VARIANT · Anthropic / Claude

Claude claude-opus-4-8 API

Same API, same SDK — switch variants by changing one parameter.

Operational · text · Commercial OK

# Works with Claude Code, Codex, Gemini CLI, Cursor, and 50+ agents
npx skills add runapi-ai/claude -g

The -g flag installs globally so every project picks it up.

Or paste this prompt to your AI agent:

Install the Claude skill for me:

1. Clone https://github.com/runapi-ai/claude
2. Copy the skills/claude/ directory into your
   user-level skills directory (e.g. ~/.claude/skills/
   for Claude Code, ~/.codex/skills/ for Codex).
3. Verify that SKILL.md is present.
4. Confirm the install path when done.

Switch variant

claude-haiku-4-5-20251001 claude-opus-4-5-20251101 claude-opus-4-6 claude-opus-4-7 claude-sonnet-4-5-20250929 claude-sonnet-4-6

OVERVIEW

claude-opus-4-8 targets the sweet spot of quality and cost within the Claude family.

Pay-per-call pricing in USD
Failed generations not charged
Streaming when supported by the model
Schema-validated tool calls

PRICING

Pricing

Failed generations are not charged

Messages API

Input $2.50 / 1M tokens

Output $12.50 / 1M tokens

Cache read $0.25

Cache write 5m $3.13

Cache write 1h $5.00

SPEC SHEET

Technical details

Model ID	claude-opus-4-8
Provider	Anthropic
Modality	text
Task type	synchronous
Billing unit	1K tokens
API endpoint	/v1/messages
Commercial license	Yes — included via API
Status	Operational

QUICKSTART

Quickstart — claude-opus-4-8

runapi.ai

curl -X POST https://runapi.ai/v1/messages \
  -H "Authorization: Bearer $RUNAPI_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "claude-opus-4-8",
  "max_tokens": 1024,
  "messages": [
    {
      "role": "user",
      "content": "Review this pull request for security vulnerabilities, performance issues, and suggest concrete improvements."
    }
  ]
}'

import { ClaudeClient } from "@runapi.ai/claude";

const client = new ClaudeClient();
const result = await client.message.run({
    model: "claude-opus-4-8",
    max_tokens: 1024,
    messages: [{"role":"user","content":"Review this pull request for security vulnerabilities, performance issues, and suggest concrete improvements."}],
});

require "runapi/claude"

client = RunApi::Claude::Client.new
result = client.message.run(
    model: "claude-opus-4-8",
    max_tokens: 1024,
    messages: [{role: "user", content: "Review this pull request for security vulnerabilities, performance issues, and suggest concrete improvements."}]
)

@runapi.ai/claude v1

HOW IT WORKS