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Models / Anthropic

Claude Sonnet 4.6

GA

Best combination of speed and intelligence. Dateless pinned snapshot ID == alias claude-sonnet-4-6. Extended thinking: Yes; adaptive thinking: Yes. 1M context, max output 128k (300k via Batch API beta header). 5m cache $3.75, 1h cache $6, cache hits $0.30/MTok. Batch $1.50/$7.50. Reliable knowledge cutoff Aug 2025; training data cutoff Jan 2026. Tentative retirement not sooner than February 17, 2027. Release date not explicitly published (null). Now a LEGACY model (still generally available, not deprecated) — superseded by Claude Sonnet 5 as of 2026-06-30; consider migrating for improved performance.

Claude Sonnet 4.6 by Anthropic costs $3 per 1M input tokens and $15 per 1M output tokens ($6/1M blended), with a 1M (1.000.000-token) context window. It is generally available (GA), with a knowledge cutoff of Aug 2025.

Last verified: 13 Aug 2026 · sourced from official provider documentation

Provider
Anthropic
Status
GA
Input price
$3 / 1M tokens
Output price
$15 / 1M tokens
Cached input
$0.3 / 1M tokens
Blended price
$6 / 1M tokens
Context window
1.000.000 tokens (1M)
Max output
128.000 tokens
Modality
text, image, vision
Open weights
No — API only
Knowledge cutoff
2025-08
Released
—
API string
claude-sonnet-4-6

Source: Anthropic official documentation ↗

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FAQ

Claude Sonnet 4.6 — questions & answers

How much does Claude Sonnet 4.6 cost?

Claude Sonnet 4.6 is priced at $3 per 1M input tokens and $15 per 1M output tokens ($6/1M blended at a 3:1 input-to-output ratio), with cached input at $0.3 per 1M tokens.

What is the context window of Claude Sonnet 4.6?

Claude Sonnet 4.6 has a 1.000.000-token context window (1M), with up to 128.000 output tokens per request.

Is Claude Sonnet 4.6 deprecated?

No — Claude Sonnet 4.6 is generally available (GA) and not currently scheduled for deprecation or retirement in our tracker.

Does Claude Sonnet 4.6 support image or vision input?

Yes — Claude Sonnet 4.6 accepts image input. Listed modalities: text, image, vision.

Can I self-host Claude Sonnet 4.6?

No — Claude Sonnet 4.6 is proprietary. Its weights are not publicly released, so it is available only through Anthropic's API (or hosted partners), not for self-hosting.

What is the API model string for Claude Sonnet 4.6?

The API model identifier for Claude Sonnet 4.6 is "claude-sonnet-4-6" when calling Anthropic's API.

What is Claude Sonnet 4.6's knowledge cutoff?

Claude Sonnet 4.6's training knowledge cutoff is Aug 2025.