Claude Opus 4
The heaviest Claude model for deep analysis and compound tasks.
via Anthropic →
What is this model?
Claude Opus 4 is Anthropic's heaviest model — the Pro tier within our catalog. Optimised for the deepest reasoning capabilities, top scores on research benchmarks and heavy multi-step tasks that other models cannot handle. 200K-token context window and the highest quality on complex coding, legal analysis and scientific literature.
Strengths
Strengths: best reasoning capabilities on the entire platform, strong in research and deep dives, complex coding (refactor, debug, multi-file edits), nuance-level legal analysis and scientific literature. For "I want the best answer quality regardless of cost or speed", this is the only right pick.
Best suited for
- Research, deep dives and analyses
- Long documents and summaries
- Complex reasoning and multi-step tasks
How ZelixAI uses this model
We position Opus 4 as the Pro pick within ZelixAI: for research bots delivering depth analyses, complex content creation where nuance is critical, enterprise-tier support for specific questions juniors cannot answer, and use cases where the user deliberately picks top quality.
Real-world examples within ZelixAI
Concrete praktijkvoorbeelden voor dit model worden binnenkort hier gepubliceerd. Stel intussen vragen via onze contactpagina — we delen graag relevante use-cases uit onze klantbasis.
Limitations and caveats
Limitations: highest cost per token across the entire platform — for most business situations Sonnet 4 is more than sufficient. Slower than Haiku or Sonnet, so not for real-time chat. US cloud provider — not suitable for strict EU data residency. Use Opus 4 deliberately and on specific use cases — otherwise your token budget runs out faster than needed.
Technical specifications
| Provider | Anthropic |
| Context window | 200K tokens |
| Throughput | 15–40 tokens/s (Average) |
| Cost tier | Pro tier |
| Tool / function-calling | yes |
| Data residency | United States (cloud provider) |