Anthropic · llm model

Claude Sonnet 5

Claude Sonnet 5 is an Anthropic language model released Jun 30, 2026; Anthropic's newest language model in our dataset is Claude Haiku 5.5. Proprietary, API access only. Anthropic's Claude Sonnet generation launched Jun 30, 2026 at $2 / $10 per million tokens, a price Anthropic made standard on Aug 10, 2026. Verified against vendor sources on Oct 26, 2026.

Reported Last verified Oct 26, 2026 · All models · JSON · Markdown

ReleasedJun 30, 2026
Context window1M1,000,000 tokens
Max output128K128,000 tokens
LicenceProprietaryProprietary (API)

Modalities not verified

Key facts

Claude Sonnet 5: key facts with sources
Fact	Value	Source
Vendor	Anthropic	n/a
Released	Jun 30, 2026 Date of the launch entry in the Claude Platform release notes (API availability).	source
Status	generally available	n/a
API id	claude-sonnet-5	source
Context window	1,000,000 tokens (1M)	source
Max output	128,000 tokens	source
Licence	Proprietary (API)	source
Pricing	$2 in / $10 out per 1M tokens	source

Where Claude Sonnet 5 sits in our data

Released Jun 30, 2026 (week 27 of 2026), in June 2026. Other models in our data released that month: Nano Banana 2 Lite, GLM-5.2, Claude Fable 5, Claude Mythos 5, North Mini Code.
The previous Anthropic model we track is Claude Mythos 5 (Jun 9, 2026), 21 days earlier.
Of the 60 models in our data with a published context window, Claude Sonnet 5 has the number 33 largest (1M tokens). Our data is not every model on the market.
Anthropic tools we cover: Claude Code, Claude.
All releases by date: AI model releases by month · new AI models this week. Choosing for code: best LLM for coding.

How Claude Sonnet 5 differs from Claude Sonnet 5.5

Read from the recorded facts of the two models, not from a head-to-head test. We have not run either.

Listed price is the same as Claude Sonnet 5.5: $2 in and $10 out (per 1M tokens).
Both list a 1M-token context window.
Claude Sonnet 5 came out 90 days before Claude Sonnet 5.5.
Facts for the other model: Claude Sonnet 5.5.

What we tested

Nothing yet. We have not run Claude Sonnet 5 ourselves, so every fact on this page is Reported from the sources below. When we do test it, the scope will be stated here and in our test logs. See methodology.

Not verified, left out

We could not confirm these on a vendor page, so we do not state them.

Priority Tier is not available on Claude Sonnet 5 per the release notes.