Claude Opus Free API — Try Opus 4.6 with Starter pack

Can You Use Claude Opus for Free?

Yes. ClaudeStore provides Starter pack access to Claude Opus 4.6 — Anthropic's most powerful model. No credit card, no Anthropic account, no regional restrictions. Opus 4.6 is the best choice for complex reasoning, multi-file code changes, research, and analysis.

Claude Opus 4.6 Capabilities

Quick Start: Opus 4.6 API

import anthropic

client = anthropic.Anthropic(
    api_key="YOUR_FREE_KEY",
    base_url="https://api2.claudestore.store"
)

message = client.messages.create(
    model="claude-opus-4.6",
    max_tokens=4096,
    messages=[
        {"role": "user", "content": "Design a microservices architecture for an e-commerce platform."}
    ]
)
print(message.content[0].text)

export ANTHROPIC_API_KEY="YOUR_FREE_KEY"
export ANTHROPIC_BASE_URL="https://api2.claudestore.store"
claude --model claude-opus-4.6

When to Use Opus vs Sonnet vs Haiku

• Use Opus 4.6 for architecture design, complex debugging, research papers, and multi-step reasoning tasks.
• Use Sonnet 4.6 for everyday coding, content writing, and general-purpose tasks (best value).
• Use Haiku 4.5 for quick edits, test generation, classification, and high-volume simple tasks.

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