Price comparison · checked October 12, 2026

Claude Opus 5.5 vs Claude Sonnet 5.5 pricing

For a typical support chatbot (60,000 conversations a month), Claude Sonnet 5.5 costs $360 a month and Claude Opus 5.5 costs $720. That makes Claude Sonnet 5.5 2.0× cheaper for this workload.

Claude Opus 5.5Claude Sonnet 5.5
ProviderAnthropicAnthropic
Input / 1M$4.00$2.00
Cached input / 1M$0.20$0.10
Output / 1M$20.00$10.00
Context window1M1M
Notes––

Monthly cost by workload

WorkloadClaude Opus 5.5Claude Sonnet 5.5Difference
Support chatbot
60,000 req · 1,500 in / 300 out
$720$360Claude Sonnet 5.5 2.0× cheaper
Document summaries
20,000 req · 6,000 in / 400 out
$640$320Claude Sonnet 5.5 2.0× cheaper
Coding assistant
30,000 req · 4,000 in / 800 out
$960$480Claude Sonnet 5.5 2.0× cheaper
RAG search
100,000 req · 2,500 in / 250 out
$1,500$750Claude Sonnet 5.5 2.0× cheaper

Standard rates, no caching or batch discounts. Sources: platform.claude.com

Try your own numbers

Start from a use case

1,000 tokens is about 750 English words. Input includes your system prompt, chat history and any retrieved documents.

Claude Sonnet 5.5
AnthropicCheapest
$360 /mo
Claude Opus 5.5
Anthropic
$720 /mo

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