Test Sonnet 5.5 before paying to switch

AWS has announced Claude Sonnet 5.5 on Amazon Bedrock and Claude Platform on AWS. In its launch announcement, AWS describes the model as faster and less costly per task for most work, positioning it for clearly defined coding, analysis and document tasks. That makes it worth a controlled test. It does not establish that switching will save your business money.

The comparison matters. AWS specifically says Sonnet 5.5 has a lower cost per task than Opus 5.5 for most work. It also claims more polished documents and visuals than Sonnet 5. The announcement does not give a numerical saving or demonstrate a cost advantage over whatever you currently use.

Start with routine work you can check

For a business of five to fifty people, our recommendation is to look first at a recurring task with a clear brief and an output someone can check. AWS lists scoped analysis, short spreadsheet edits and routine document tasks among Sonnet 5.5’s uses. Those are sensible starting points for a trial, rather than handing it an entire business process.

You might test a weekly management summary, a short internal briefing or an edit to a spreadsheet. These are suggested trials, not results reported by AWS. Choose work where you already know what a good answer looks like, so you can judge whether the output is ready to use.

AWS draws a distinction between the two models: Sonnet 5.5 handles work where the approach is already clear, while Opus 5.5 takes tasks requiring careful judgement. Treat that as the supplier’s positioning. Keep your own approval step, especially when an output could influence a customer commitment or a business decision.

For teams already using AWS, the announcement says Bedrock works with existing access, audit, monitoring and guardrail controls, with usage appearing on the AWS bill. However, do not read its reference to regional data residency as confirmation of Australian processing. The availability section specifies a global inference profile and directs readers to documentation for supported regions. Ask your provider to confirm the location and routing of your proposed setup before using sensitive records.

Compare the cost of an accepted result

Our recommendation is to run a small comparison before approving a switch. Judge the cost of getting a usable result, including your team’s checking and correction time. The launch claim alone is not enough to set a savings target.

• Choose one existing task. Use a repeatable job with clear requirements and a person responsible for accepting the result.
• Use matching inputs. Give your current tool and Sonnet 5.5 the same brief and suitable sample material. Avoid changing the whole workflow during the comparison.
• Record what needed fixing. Note missing details, incorrect answers, repeat attempts and staff time spent reviewing each output.
• Count the switching work. Include setup, revised instructions and staff training in your decision, rather than comparing model charges alone.

To try the model, AWS directs users to the Amazon Bedrock console, then Test > Playground, where they can select Sonnet 5.5 and run a prompt. AWS also says usage, performance and costs can be monitored through CloudWatch and AWS Cost Explorer.

Use that trial to answer a narrow question: does this model complete your chosen task to the required standard at a lower total cost? If the evidence supports a change, expand gradually. If it does not, the announcement gives you no reason to rush.