Claude Sonnet 4.6 vs Claude 3.5 Sonnet
Pricing, context window, and benchmark comparison · Last updated April 2026
Claude 3.5 Sonnet is cheaper than Claude Sonnet 4.6 at $3.00/1M/1M vs $3.00/1M/1M input tokens. Claude Sonnet 4.6 scores higher on quality benchmarks (ELO 1310). Choose Claude 3.5 Sonnet for cost-sensitive workloads; choose Claude Sonnet 4.6 for maximum quality.
Which is cheaper: Claude Sonnet 4.6 or Claude 3.5 Sonnet?
Claude Sonnet 4.6 and Claude 3.5 Sonnet are identically priced at $3.00/1M per 1M input tokens. Output pricing follows a similar pattern: Claude Sonnet 4.6 charges $15.00/1M/1M vs $15.00/1M/1M for Claude 3.5 Sonnet.
Which has better quality: Claude Sonnet 4.6 or Claude 3.5 Sonnet?
Based on LMSYS Chatbot Arena rankings, Claude Sonnet 4.6 achieves a higher ELO score (1310 vs 1295), suggesting stronger performance on open-ended tasks. Claude Sonnet 4.6 excels at latest claude model with improved agentic capabilities. Claude 3.5 Sonnet is known for 200k context window — best for long documents.
Which should you choose: Claude Sonnet 4.6 or Claude 3.5 Sonnet?
- → Latest Claude model with improved agentic capabilities
- → Better at multi-step autonomous workflows
- → 200K context window
- → 200K context window — best for long documents
- → Industry-leading coding performance
- → Nuanced instruction following
Frequently Asked Questions
Which is cheaper: Claude Sonnet 4.6 or Claude 3.5 Sonnet?
Claude Sonnet 4.6 and Claude 3.5 Sonnet have the same input price of $3.00/1M per 1M tokens.
Which has better quality: Claude Sonnet 4.6 or Claude 3.5 Sonnet?
Claude Sonnet 4.6 scores higher on the LMSYS Chatbot Arena with an ELO of 1310, suggesting better overall quality for most tasks.
Which has a larger context window: Claude Sonnet 4.6 or Claude 3.5 Sonnet?
Both Claude Sonnet 4.6 and Claude 3.5 Sonnet have the same context window.
Should I choose Claude Sonnet 4.6 or Claude 3.5 Sonnet?
Choose Claude 3.5 Sonnet if cost is the priority. Choose Claude Sonnet 4.6 if benchmark quality is most important. Consider your specific use case: Claude Sonnet 4.6 is best for coding and function-calling, while Claude 3.5 Sonnet excels at coding and document-analysis.
Is Claude Sonnet 4.6 or Claude 3.5 Sonnet open source?
Claude Sonnet 4.6 is proprietary. Claude 3.5 Sonnet is proprietary.