Claude Sonnet 5 (batch)

Claude Sonnet 5 is Anthropic's mid-tier model with a 1M token context window and adaptive thinking capabilities selectable at multiple reasoning effort levels.

Strengths

Handles coding, agentic work, and professional tasks with strong performance across reasoning depth and speed tradeoffs.

Best for

Workloads requiring balancing capability with latency where you can tune reasoning effort to match the problem, and applications leveraging the full 1M token context.

Limitations

Sits below Claude Opus 5 and Claude Fable 5 on capability for the most complex multi-step reasoning and long-horizon agentic work; batch-only variant trades real-time access for lower cost.