Which Model for Which Use Case?
Standard Workloads (Default)
For most applications — chatbots, content generation, summarization, code assistance — Sonnet 4.6 delivers excellent quality at 40% lower cost. Same 1M context, same API key, same ecosystem.
Complex Reasoning & Analysis
Opus 4.8 excels at multi-step reasoning, nuanced analysis, and tasks requiring the deepest understanding. For critical decision-making, legal analysis, or research — the premium is worth it.
Tiered Strategy (Best of Both)
Use Sonnet 4.6 as the default for routine tasks, and escalate to Opus 4.8 only for complex reasoning. This tiered approach saves 30-40% while maintaining quality where it matters most.
Budget-Conscious Teams
At $3/$15, Sonnet 4.6 offers 97% of Opus quality at 60% of the cost. For startups and teams watching their API budget, Sonnet 4.6 is the sweet spot between quality and affordability.
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Frequently Asked Questions
Is Claude Sonnet 4.6 cheaper than Claude Opus 4.8?
Yes. Claude Opus 4.8 costs $5/M input and $25/M output. Claude Sonnet 4.6 costs $3/M input and $15/M output. Sonnet 4.6 is 40% cheaper on input and 40% cheaper on output. For a typical workload of 1M input + 500K output tokens/month, Sonnet 4.6 costs $10.50 vs Opus 4.8's $17.50 — saving you $7/month (40%).
What is the quality difference between Opus 4.8 and Sonnet 4.6?
Claude Opus 4.8 is Anthropic's flagship premium model with the highest reasoning, coding, and analysis capabilities. Claude Sonnet 4.6 is the mid-tier model that offers excellent quality at 40% lower cost. For most standard workloads — chatbots, content generation, summarization, code assistance — Sonnet 4.6 delivers comparable quality. Opus 4.8 excels at complex multi-step reasoning, nuanced analysis, and tasks requiring the deepest understanding.
Do Opus 4.8 and Sonnet 4.6 have the same context window?
Yes. Both Claude Opus 4.8 and Claude Sonnet 4.6 have a 1M token context window. This is a significant upgrade from the deprecated Claude 4 Opus and Sonnet 4, which had 200K context windows. The 1M context means both models can handle much longer documents, larger codebases, and more extensive conversation histories in a single API call.
When should I use Opus 4.8 vs Sonnet 4.6?
Use Opus 4.8 when you need the highest quality reasoning, complex multi-step analysis, or tasks where accuracy is critical and cost is secondary. Use Sonnet 4.6 for standard workloads where excellent quality at 40% lower cost is the priority. A common strategy is to use Sonnet 4.6 as the default and only escalate to Opus 4.8 for complex tasks that require premium reasoning.
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