Claude Sonnet 4.6
Chat model · Anthropic ·
Claude Sonnet 4.6 is a chat model by Anthropic. In Endless it costs 243 credits per 1M input tokens and 1215 per 1M output tokens, on the Hobby plan and up.
Claude Sonnet 4.6 is Anthropic's February 2026 Sonnet for everyday coding, writing and analysis, with a 1M-token context for long documents.
- Price
- 243 credits per 1M input tokens
- 1215 credits per 1M output tokens
- Availability
- Available on Hobby and above
- Context window
- 1M tokens
- Max output
- 128K tokens
- Inputs
- Text, images
- Outputs
- Text
About Claude Sonnet 4.6
Claude Sonnet 4.6 came out in February 2026 and brought results that used to call for an Opus-class model into the Sonnet tier. It reads context before modifying code and consolidates shared logic instead of duplicating it. It also improved clearly at computer use, such as navigating complex spreadsheets and filling multi-step web forms. It takes text and images.
Its 1M-token context fits a whole codebase, a lengthy contract or dozens of research papers in one request, so it works well for questions across large document sets, everyday code fixes, front-end changes and office tasks. It follows instructions closely and makes fewer factual slips than the Sonnet models before it.
Claude Sonnet 5 and Claude Sonnet 5.5 have since raised the bar on agentic work and speed. Sonnet 4.6 stays a familiar option for teams with prompts and workflows already tuned to it, and you can switch models in the same workspace.
Best for
- Questions across long contracts and research papers
- Everyday code fixes and front-end changes
- Spreadsheet and form-heavy office tasks
Questions about Claude Sonnet 4.6
- What is Claude Sonnet 4.6?
- Claude Sonnet 4.6 is a chat model by Anthropic.
- Is Claude Sonnet 4.6 free?
- Claude Sonnet 4.6 needs the Hobby plan or higher, so the Free plan doesn't include it. The Free plan gives you 100 credits when you create a workspace and 50 credits every week to try other chat models.
- How much does Claude Sonnet 4.6 cost?
- In Endless it costs 243 credits per 1M input tokens and 1215 per 1M output tokens, on the Hobby plan and up.
- How do I use Claude Sonnet 4.6?
- Start a chat in your Endless workspace and choose Claude Sonnet 4.6 in the model picker. Endless can also pick the best model for each message on its own.
- What are the alternatives to Claude Sonnet 4.6?
- Similar models you can use in Endless include Claude Opus 5.5, Claude Fable 5, and Claude Fable 5.1. Each one has its own page with its price and plan.
- How large is the Claude Sonnet 4.6 context window?
- It holds 1M tokens, enough for an entire codebase or dozens of research papers in one request. It can write up to 128K tokens in a reply.
- Should I use Claude Sonnet 4.6 or a newer Sonnet?
- For new work, Claude Sonnet 5.5 is the current Sonnet and is faster and stronger at coding and agent tasks. Sonnet 4.6 fits when you want results consistent with existing workflows.
How to use Claude Sonnet 4.6 in Endless
- 01
Open a chat
Start a chat in your workspace and choose Claude Sonnet 4.6 in the model picker.
- 02
Bring your context
Attach files, mention a project with @, or ask it to search the web and social media.
- 03
Turn answers into work
Generate images and video, write documents and save what matters to a project.
Related models
Claude Opus 5.5
by Anthropic
Long agentic coding and research work over a 1M-token context
324 / 1620 credits per 1M tokens
Claude Fable 5
by Anthropic
Long autonomous sessions that stay focused across millions of tokens
810 / 4050 credits per 1M tokens
Claude Fable 5.1
by Anthropic
Hard reasoning and long unattended agent runs over a 1M-token context
810 / 4050 credits per 1M tokens
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