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Claude Opus 4.5 is Anthropic’s most intelligent and capable model, available through Starrise AI via OpenAI-compatible interface. It leads all benchmarks with the deepest reasoning, strongest coding abilities, and most nuanced creative writing.

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Key Capabilities

  • OpenAI-compatible — Drop-in replacement for the OpenAI SDK, no other code changes needed
  • Best-in-class reasoning — Highest accuracy on complex multi-step problems
  • Top-tier coding — Expert at large-scale code generation, debugging, and architecture design
  • Exceptional creativity — Most nuanced and expressive writing and analysis
  • Long context — Supports large document processing and multi-turn conversations
  • Streaming — Real-time token streaming via SSE

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Quick Example

curl https://ai.alad.com/v1/messages \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "claude-opus-4-5",
    "messages": [
      { "role": "user", "content": "Explain quantum entanglement in simple terms." }
    ]
  }'

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Parameters

ParameterTypeRequiredDescription
modelstringYesFixed value: claude-opus-4-5
messagesarrayYesArray of { role, content } objects
max_tokensintegerNoMaximum number of tokens to generate
temperaturefloatNo0–2, controls randomness, default 1
streambooleanNoEnable SSE streaming, default false
top_pfloatNoNucleus sampling threshold, default 1
stopstring / arrayNoSequences where generation stops

API Reference

View the interactive API Playground for Claude Opus 4.5.