Claude 4.5 Opus vs Claude 3 Sonnet

1. Maximum capability with more practical pricing

• Anthropic introduced Opus 4.5 as its most intelligent model, combining maximum capability with practical performance.
• It was positioned as the best model in the world for coding, agents, and computer use at launch, with pricing reduced to $5/M input and $25/M output.

2. Step-change gains for coding and advanced agent work

• Anthropic describes Opus 4.5 as state-of-the-art on real-world software engineering tests.
• It also improved everyday knowledge-work tasks like deep research, slides, and spreadsheets while staying strong on long-horizon agent workflows.

3. Better control over reasoning depth

• Opus 4.5 introduced the effort parameter, letting developers trade off response thoroughness against token efficiency.
• This made it easier to use one flagship model across both high-depth analysis and more cost-sensitive production workloads.

4. Stronger computer use and continuity

• Added enhanced computer use with a zoom action for inspecting detailed screen regions.
• Preserves prior thinking blocks across turns, helping the model maintain reasoning continuity in extended multi-step tasks.

1. Speed + Intelligence Blend

• 2x faster than Claude 2/2.1
• Strong reasoning with lower cost

2. Enterprise-Ready

• Designed for high-volume, large-scale deployments
• Excellent stability for production workloads

3. Versatile Task Performance

• Great for RAG, search, document understanding
• High-quality code generation
• Effective at sales automation and knowledge retrieval

4. Vision Capabilities

• Reads charts, graphs, images reliably
• Extracts text from visuals efficiently