# Claude Sonnet 4.6

id: ent_claude-sonnet-4-6  
kind: product  
timeline: /timelines/claude-sonnet-4-6.md  
page: /record/claude-sonnet-4-6  
same_as: https://asof.is/record/claude-sonnet-4-6 (how to cite the id: /identifiers.md)  

balanced Sonnet model; claude.ai default for Free and Pro

## Fact pages

One page per fact: the current value with its sources, then every dated value and what replaced what. Fetch any of them as markdown.

- [Claude Sonnet 4.6 release date](/record/claude-sonnet-4-6/model_release.md)
- [Claude Sonnet 4.6 predecessor](/record/claude-sonnet-4-6/predecessor.md)
- [Claude Sonnet 4.6 context window](/record/claude-sonnet-4-6/context_window.md)
- [Claude Sonnet 4.6 price](/record/claude-sonnet-4-6/price.md)

## Current state

What the record asserts: claims that held, valid by their sources or primary-sourced at confidence 0.7 or more. Unverified, disputed, retracted and review-marked claims are listed below, labelled, not here.

- [Claude Sonnet 4.6](/record/claude-sonnet-4-6.md) | context_window | 1M token context window (beta) | valid 2026-02-17 to present | conf 0.95 | valid | [clm_0DE4E8CF1DA4](/claim/clm_0DE4E8CF1DA4.md)
  sources: https://www.anthropic.com/news/claude-sonnet-4-6
- [Claude Sonnet 4.6](/record/claude-sonnet-4-6.md) | predecessor | Sonnet 4.5 | valid 2026-02-17 to present | conf 0.95 | valid | [clm_C67FB3D77302](/claim/clm_C67FB3D77302.md)
  sources: https://www.anthropic.com/news/claude-sonnet-4-6
- [Claude Sonnet 4.6](/record/claude-sonnet-4-6.md) | price | $3/$15 per million tokens | valid 2026-02-17 to present | conf 0.95 | valid | [clm_D9D9147B30F6](/claim/clm_D9D9147B30F6.md)
  sources: https://www.anthropic.com/news/claude-sonnet-4-6

## All claims

One claim per line, newest first. Superseded claims stay visible.

- [Claude Sonnet 4.6](/record/claude-sonnet-4-6.md) | context_window | 1M token context window (beta) | valid 2026-02-17 to present | conf 0.95 | valid | [clm_0DE4E8CF1DA4](/claim/clm_0DE4E8CF1DA4.md)
  sources: https://www.anthropic.com/news/claude-sonnet-4-6
- [Claude Sonnet 4.6](/record/claude-sonnet-4-6.md) | predecessor | Sonnet 4.5 | valid 2026-02-17 to present | conf 0.95 | valid | [clm_C67FB3D77302](/claim/clm_C67FB3D77302.md)
  sources: https://www.anthropic.com/news/claude-sonnet-4-6
- [Claude Sonnet 4.6](/record/claude-sonnet-4-6.md) | price | $3/$15 per million tokens | valid 2026-02-17 to present | conf 0.95 | valid | [clm_D9D9147B30F6](/claim/clm_D9D9147B30F6.md)
  sources: https://www.anthropic.com/news/claude-sonnet-4-6

## Posts and Hugging Face repos (1)

Dated items from the entity's own feeds, and the days its Hugging Face repositories were created, newest first.

- [Claude Sonnet 4.6](/record/claude-sonnet-4-6.md) | model_release | Claude Sonnet 4.6 | valid 2026-02-17 to present | conf 0.95 | valid | [clm_9E78052E1A8A](/claim/clm_9E78052E1A8A.md)
  sources: https://platform.claude.com/docs/en/release-notes/overview

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AsOf is a temporal fact ledger: a structured, dated, sourced record of what is true and what changed, built for AI retrieval.