Claude Sonnet 4.5 AI Chat Assistant

Use Claude Sonnet 4.5 for tone-sensitive writing, long-form summaries, policy-aware analysis, code explanation, and careful drafting. It sits between Haiku's speed and Opus's higher-cost depth for everyday work that still needs good judgment.

On Rivya, Claude Sonnet 4.5 currently runs as a text-first chat project.

Provide the source material, intended audience, tone, constraints, and a concrete output shape. Sonnet's value comes from following that editorial frame consistently, not from a large set of page controls.

Rivya currently bills 170 input credits and 855 output credits per million tokens. That tier makes sense when writing quality, nuance, or policy awareness can reduce revision rounds compared with a faster model.

Choose Sonnet for careful general-purpose writing and analysis. Choose Haiku for faster routine work, or Opus when the task needs deeper research synthesis or more demanding judgment.

Start here when the first response should test editorial rewrites, tone-sensitive writing, long-form summaries, or careful analysis on one specific Claude model. That gives you a contained first turn to check the prompt, direction, and response quality before moving into a longer project.

This page is set up as the public chat entry for Claude Sonnet 4.5. That keeps the first result centered on editorial rewrites and tone-sensitive writing instead of forcing the work into a longer thread too early.

Before the first turn, it matters more to line up the task frame, source material, and how careful the answer needs to be than to hunt for extra controls. On a text-first chat option like Claude Sonnet 4.5, that opening setup usually decides whether the first result is strong enough for editorial rewrites and tone-sensitive writing.

The page is publicly visible, but the actual first send is still gated behind sign in. Rivya currently bills this by usage: 170 input credits and 855 output credits per million tokens. You can use this page to frame the question and choose the model first, then sign in when you are ready to start the live thread.

Stay on this page while the job is still a first conversation and you are testing whether Claude Sonnet 4.5 can get traction on editorial rewrites and tone-sensitive writing from the first turn. Open the full Studio once the work needs saved context, attached files, follow-up rounds, or a thread you know you will keep expanding.