How is Claude Sonnet 5 priced?

It uses 170 credits per million input tokens and 855 per million output tokens, then settles from the actual credits reported by the response.

Can Sonnet 5 accept code-file uploads?

No. Attachments are not supported, but you can paste the necessary snippet within the 20,000-character per-message limit.

When should I move to Opus?

Compare Opus when representative tasks show that Sonnet 5 misses critical constraints, lacks review depth, or is unstable on the required reasoning.

AI conversation model

Anthropic

Claude Sonnet

Claude Sonnet 5

Claude Sonnet 5 is the more balanced Claude candidate in this batch for research, code explanation, and structured writing. Its maximum output on this site is 4,096 tokens.

Position

Balanced quality and cost

Maximum output

4,096 tokens

Input

Text only

170 input and 855 output credits per million tokens.

Maximum output is 4,096 tokens.

Standard and SSE responses use the same three-way actual-credit settlement.

Use this model View credit pricing Back to Model Hub

30-second overview

Claude Sonnet

Token-based pricing

What it does best

A general-purpose Claude text model that balances quality, speed, and token rates.

Best for

Everyday research summaries, code collaboration, product documentation, and knowledge work that benefits from iterative refinement.

At a glance

What is this model like?

Kyeo AI offers text-only access without images, web search, or tool controls. A conversation can include the 40 most recent submitted messages. The site reserves against a conservative input bound before creation, then refunds excess credits or enters reconciliation based on the reported actual amount.

What it does best

A general-purpose Claude text model that balances quality, speed, and token rates.

Best for

Everyday research summaries, code collaboration, product documentation, and knowledge work that benefits from iterative refinement.

Why use it on Kyeo AI

Kyeo AI provides a selectable model with clear input, output, and billing boundaries without extending capabilities that are not available here.

Key facts

Quickly assess whether this model fits your use case.

Vendor

Anthropic

Family

Claude Sonnet

Maximum output

4,096 tokens

Message window

40 most recent submitted messages

Attachments

Not supported

Also known as

The same model may appear under different names across documentation and community discussions; this list keeps them easy to search and compare.

Claude Sonnet 5 Chat

Sonnet 5

Common questions

These practical questions focus on the task, input conditions, and result requirements you should confirm before choosing.

How do I use Claude Sonnet 5?

How much does Claude Sonnet 5 cost?

Is Claude Sonnet 5 good for coding?

How is Claude Sonnet 5 different from Opus 5?

Selection guide

Use these decision points when choosing a model.

For high-quality general text work

Start with Sonnet 5 on a representative research, documentation, or code-explanation sample.

For extremely complex work

If Sonnet 5 repeatedly misses key constraints, compare Opus 4.8 or Opus 5.

For short, frequent tasks

Compare the total cost with available lower-rate Flash or GPT models.

Popular comparisons

Compare common alternatives on the same task to clarify differences in inputs, controls, and cost.

How is Sonnet 5 different from Sonnet 4.6?

Should I choose Sonnet 5 or Claude Fable 5?

Model comparison

Compare the current model with alternatives at a glance.

Practical usage insights

Practical guidance based on public sources, current on-site limits, and representative tasks.

Balanced models can anchor a default workflow

Most teams benefit more from stable, reusable templates than from using the most expensive model for every task.

Evaluate coding on real repository tasks

Broad benchmarks cannot replace side-by-side tests with your actual languages, frameworks, and testing requirements.

Capabilities

Research summaries

Reorganize supplied material into conclusions, evidence, and open questions.

Code collaboration

Explain logic, propose test cases, and review text code snippets.

Structured writing

Draft documents for a defined audience, tone, and format.

Use cases

Requirement clarification

Turn an ambiguous request into scope, acceptance criteria, and risks.

Technical explanations

Translate implementation details into documents for different audiences.

Source synthesis

Deduplicate several input passages and produce a structured summary.

Prompt tips

Provide an output template

Explicit heading levels, fields, and length limits reduce rework.

Mark what must not be guessed

Require unknown facts to be labeled rather than hidden behind fluent phrasing.

Validate code in stages

Ask for an explanation and test list before requesting changes.

Why choose it

Offers a more balanced quality-to-rate profile.

Supports a broad range of text-only knowledge tasks.

Preauthorization covers the full conversation and maximum output.

What to know first

Image and file attachments are not supported.

Search and tool controls are not available.

A single response is limited to 4,096 tokens.

Adjustable parameters

Quickly assess whether this model fits your use case.

No additional settings are available on this page.

Credit usage

Token-based pricing

170 credits per million input tokens and 855 credits per million output tokens; settlement uses the credits reported by the response.

Budget tip

Before batch generation, run an A/B test with the same assets across the current model and alternatives to validate quality and avoid wasting credits.

FAQ

Related models

Compare these similar candidates before deciding.

Claude Opus 4.8

Claude Opus 4.8 is designed for high-complexity text analysis and consequential writing. Kyeo AI offers text-only chat with up to 20,000 characters per message and an explicit 4,096-token maximum output.

AI conversation model

Token-based pricing

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Claude Fable 5

Claude Fable 5 is designed for demanding narrative development and creative collaboration. Kyeo AI offers text-only access with a 4,096-token maximum output and sends no tool or attachment fields.

AI conversation model

Token-based pricing

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Claude Opus 5

Claude Opus 5 is a flagship candidate for high-complexity text work. Kyeo AI limits each message to 20,000 characters, includes the 40 most recent submitted messages, and caps output at 4,096 tokens.

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Token-based pricing

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Sources

Content is based on model documentation, feature references, and the settings available on Kyeo AI.

Source note

Claude Sonnet 5 is integrated through a text-only Messages contract with a 4,096-token maximum output. The site reserves conservatively before creation, then uses reported actual credits to settle both standard and streaming completions.

Last updated: 2026-08-11

Current Claude Sonnet 5 site specifications

Platform

Records text-only messaging, the 4,096-token maximum output, token rates, and actual-credit settlement.