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Anthropic legacy

Claude Opus 4.1

anthropic/claude-opus-4-1

Earlier Opus generation with solid reasoning. Consider migrating to Opus 4.6.

Specifications

Context Window 200K tokens
Max Output 32K tokens
Latency moderate
Knowledge Cutoff Jan 2025
Training Data Mar 2025

Pricing

Input $15.00 per 1M tokens
Output $75.00 per 1M tokens

Capabilities

text Text generation and understanding
vision Image and visual input processing
tool use Function calling and tool integration
extended thinking Deep reasoning with chain-of-thought

API Identifiers

Model ID anthropic/claude-opus-4-1
Provider API ID claude-opus-4-1-20250805
AWS Bedrock anthropic.claude-opus-4-1-20250805-v1:0
GCP Vertex AI claude-opus-4-1@20250805

Usage via Multi-Router

curl https://api.multi-router.ai/v1/chat/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -H "x-mr-router-id: YOUR_ROUTER_ID" \
  -d '{
    "model": "anthropic/claude-opus-4-1",
    "messages": [
      {"role": "user", "content": "Hello!"}
    ]
  }'