Claude Sonnet 4.6
Claude Sonnet 4.6 is a text-only migration baseline on Kyeo AI between Sonnet 4.5 and Sonnet 5. It is no longer Anthropic's newest Sonnet, but remains useful for rerunning established 4.6 workflows or comparing 4.5, 4.6, and newer Kyeo AI models on the same tasks. This implementation is narrower than the official platform: each new message is limited to 20,000 JavaScript characters, only the 40 most recent messages are included, and attachments, web search, thinking, and tool execution are not exposed.
At a glance
What is this model like?
Use representative non-sensitive samples to evaluate quality, truncation, role behavior, actual token use, cache use, latency, and privacy. This page describes Kyeo AI's current product limits, not every feature available from the model vendor.
Key facts
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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.
Common questions
These practical questions focus on the task, input conditions, and result requirements you should confirm before choosing.
Selection guide
Use these decision points when choosing a model.
Use accepted 4.6 samples to check format adherence, factual errors, truncation, and the amount of manual editing required.
Sonnet 5 became Anthropic’s new default generation on June 30, 2026. Treat 4.6 as an intermediate baseline, not an automatic default for new work.
Test one structured-analysis task, one format-constrained rewrite, and one code-explanation task. Compare first-pass acceptance, revisions, latency, input and output tokens, and final credits. Provide verified sources directly whenever current information is needed.
Popular comparisons
Compare common alternatives on the same task to clarify differences in inputs, controls, and cost.
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.
Why Claude is often considered for writing and analysis
Benchmarks and real-world work measure different things
Capabilities
Bounded text chat
Settlement from actual usage
Feature scope stays explicit
Use cases
Legacy prompt regression
Structured text processing
Migration comparison
Prompt tips
Define evaluation dimensions first
Layer complex material
Verify final facts
Why choose it
What to know first
Adjustable parameters
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Credit usage
170 credits per million base input tokens and 855 per million output tokens; cache reads use 0.1× the input rate, while 5-minute and 1-hour cache writes use 1.25× and 2×.
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 Sonnet 4.5
Kyeo AI offers Claude Sonnet 4.5 as a text-only chat model for demanding analysis and writing, with up to 20,000 characters per message, 40 submitted messages of history, and at most 4,096 output tokens per response.
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.
Claude Opus 4.7
Kyeo AI offers Claude Opus 4.7 as a text-only chat model for demanding analysis and writing, with up to 20,000 characters per message, 40 submitted messages of history, and at most 4,096 output tokens per response.
Sources
Content is based on model documentation, feature references, and the settings available on Kyeo AI.
This page describes the current Kyeo AI experience: text-only chat, up to 20,000 characters per message, the 40 most recently submitted messages, and at most 4,096 output tokens per response. Pricing and feature claims below are limited to controls that are publicly available on this page.