When was Claude Sonnet 4 released?

Claude Sonnet 4 was released on May 22, 2025 by Anthropic. This is the official Claude Sonnet 4 release date tracked on LLM Stats.

Is Claude Sonnet 4 available via API?

Yes, Claude Sonnet 4 is available via API. See the official documentation for authentication and endpoint details. It is served by 3 providers tracked on LLM Stats.

Who created Claude Sonnet 4?

Claude Sonnet 4 was created by Anthropic.

What is the license for Claude Sonnet 4?

Claude Sonnet 4 is released under the Proprietary license.

Is Claude Sonnet 4 multimodal?

Yes, Claude Sonnet 4 is multimodal and can accept both text and images as input.

What is Claude Sonnet 4 latency?

Claude Sonnet 4 p95 time to first token is 0.40 seconds via Anthropic over the trailing 7 days. Lower time to first token means the model begins responding sooner for chat, agents and API workloads.

Where can I use Claude Sonnet 4?

Claude Sonnet 4 is available through 3 providers including Anthropic, Bedrock, Google.

Where is the Claude Sonnet 4 paper or technical report?

Claude Sonnet 4 has a paper or technical report available at https://www.anthropic.com/news/claude-4. Use that source for architecture, training, release and evaluation details.

What models should I compare Claude Sonnet 4 against?

Common Claude Sonnet 4 comparisons include Claude Sonnet 4 vs Kimi K2 0905, Claude Sonnet 4 vs Claude 3.7 Sonnet, Claude Sonnet 4 vs Qwen3 30B A3B. Compare them side by side for benchmark scores, pricing, context window, latency and API availability.

Claude Sonnet 4 API Pricing, Context Window & Benchmarks

Name: Claude Sonnet 4
Author: Anthropic

Claude Sonnet 4: API Pricing, Context Window & Benchmarks

Claude Sonnet 4 is a language model from Anthropic, released in May 2025, with multimodal input.

Claude Sonnet 4, part of the Claude 4 family, is a significant upgrade to Claude Sonnet 3.7. It excels in coding (72.7% on SWE-bench) and reasoning, responding more precisely to instructions. Sonnet 4 offers an optimal mix of capability

Input

TextImage

Output

Text

Claude Sonnet 4 benchmarks

Capability tiers

Standing within each category, adjusted for leaderboard depth.

Real tasks performance

High-confidence performance for Claude Sonnet 4 across real-world prompt categories. Only 95% intervals at most 4 points wide are shown.

Performance by conversation depth

How Claude Sonnet 4 holds up as conversations get longer.

Quality Tracker

Claude Sonnet 4 Performance Across Datasets

Scores sourced from the model's scorecard, paper, or official blog posts

llm-stats.com - Fri Sep 04 2026

Notice missing or incorrect data?

Claude Sonnet 4 pricing

Providers

Claude Sonnet 4 starts at $3.00 per million input tokens and $15.00 per million output tokens via Anthropic. See all 3 providers below with their per-token pricing, latency, throughput, and modality support.

Provider	Input $/M	Cached input $/M	Output $/M	Context in / out	TTFT p95 s	Output p5 c/s	Modalities in / out
Anthropic	$3.00	—	$15.00	200.0K/64.0K	0.40	—	/
Bedrock	$3.00	—	$15.00	200.0K/128.0K	0.50	—	/
Google	$3.00	—	$15.00	200.0K/128.0K	0.40	—	/

Cached input is the discounted price for prompt tokens served from a provider cache. TTFT is time to first token. Output is characters per second; p5 is the sustained floor exceeded by 95% of observed requests.

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Claude Sonnet 4 context window

Input and output token limits for Claude Sonnet 4, plus how it ranks on long-context understanding.

InputOutput

200Ktokens

128Ktokens

≈ 301 pages of text

200K

8K128K1M

Claude Sonnet 4 API

Available from the model provider

Claude Sonnet 4 has an official provider API. It is not currently routed through the LLM Stats gateway.

Read the official API documentation

Claude Sonnet 4 latency

Claude Sonnet 4 time to first token, sustained output throughput, and failed-request rate from live API traffic over the trailing 7 days.

Claude Sonnet 4 examples

Recent arena outputs from Claude Sonnet 4, picked from the highest-ranked matchups.

Claude Sonnet 4 license

Claude Sonnet 4 is a proprietary model available under its provider's product and API terms.

License: Proprietary; Hosted access

Proprietary license - usage restrictions apply

Claude Sonnet 4 resources

Official sources for Claude Sonnet 4: api documentation, official playground, official launch post.

Claude Sonnet 4 vs other models

The most-compared alternatives to Claude Sonnet 4 are Kimi K2 0905, Claude 3.7 Sonnet, Qwen3 30B A3B. Open any pair side-by-side for benchmarks, pricing, context, and latency.