Claude Sonnet 5.5 Price: Cost per Million Tokens in 2026
Claude Sonnet 5.5 costs $2 per million input tokens and $10 per million output tokens through OpenRouter as of September 2026.
Update (9 Nov 2026): Claude Fable 5.2 and Mythos 5.2 are out - prices, access and benchmarks are in my Claude Fable 5.2 guide.
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Claude Sonnet 5.5 is priced at $2 per million input tokens and $10 per million output tokens when accessed through OpenRouter. This pricing became available on September 28, 2026, positioning the model in the mid-range of current AI offerings.
Google · Your sourcesQuantslant higher in your Google - one clickAdd to preferred sources →How Claude Sonnet 5.5 Compares to Alternatives
At $2 input and $10 output per million tokens, Claude Sonnet 5.5 sits between budget and premium options. Gemini 3.5 Flash offers a cheaper alternative at $1.5 input and $9 output, while GPT-5.6 Sol Pro represents the premium tier at $4 input and $20 output. GLM 5.3 Prime falls in between at $2.8 input and $8.8 output. The previous Claude Sonnet 5 shares identical pricing with the 5.5 version.
For a realistic monthly workload processing 50 million input tokens and 10 million output tokens, Claude Sonnet 5.5 would cost $200 in total: $100 for input and $100 for output. The same workload on Gemini 3.5 Flash would run $165, while GPT-5.6 Sol Pro would cost $400. This places Claude Sonnet 5.5 as a middle-ground option for teams balancing cost and capability.
The model accepts text, image, and file inputs according to its specification card, which may influence total costs depending on how different input types are metered. Organizations should calculate their expected token usage across all input formats to estimate monthly expenses accurately.
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