When was Claude Sonnet 5 released?

Anthropic released Claude Sonnet 5 on 30 Jun 2026. It is available through the Opper gateway.

Does Claude Sonnet 5 support zero data retention?

Yes. Claude Sonnet 5 is available with zero data retention on AWS Bedrock through the Opper gateway. Other routes carry zero data retention with abuse monitoring; see each route's window in the data-handling section.

Where is Claude Sonnet 5 hosted?

Claude Sonnet 5 runs on both EU and US hosting routes through the Opper gateway. Pick the route that matches your residency requirement.

Is Claude Sonnet 5 trained on prompts and outputs?

No. Every hosting route for Claude Sonnet 5 is configured so customer prompts and outputs are not used to train models by default.

Is a GDPR DPA available for Claude Sonnet 5?

Yes. A GDPR Data Processing Agreement is available on at least one route serving Claude Sonnet 5. Contact hello@opper.ai to receive it.

Claude Sonnet 5

by Anthropic

Released 21 days after Claude Fable 5 · All Anthropic releases

Claude Sonnet 5 arrived on June 30, 2026 as the strongest agent-focused Sonnet Anthropic has shipped, closing much of the gap to the Opus tier while remaining the balanced choice for everyday work. The release brought large gains over Sonnet 4.6 across coding and agent evaluations, with its biggest single jump coming on terminal-based agent benchmarks, and it extends the context window to 1 million tokens. Sonnet 5 excels at agentic coding, terminal-driven workflows, and tool-heavy pipelines where reliability per request matters as much as peak intelligence. Vision, PDF input, structured output, and native tool use make it a strong default for production assistants and multi-step automations that run at volume.

Call Claude Sonnet 5 on Opper with the OpenAI SDK. Sign up without a credit card. Get started

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Key info

Input

Output

Features

Context window

Max output

64K

Input price

$2.00 /1M$0.20 cache read · $2.50 write

Output price

$10.00 /1M

Released

30 Jun 2026

EU residency available
US residency available
Zero data retention on pay-as-you-go
No training by default
GDPR DPA available

Available routes

Claude Sonnet 5 runs on 5 different routes through the Opper gateway. Compare residency, zero data retention and training posture at a glance, with full data-handling detail per route below.

Provider	Region	Training	Input	Output	Cache read
Anthropic	US	No	$2.00	$10.00	$0.20$2.50 write
AWS Bedrock	EU	No	$2.20	$11.00	$0.22$2.75 write
Azure	Multi	No	$2.00	$10.00	$0.20$2.50 write
Google Cloud	Multi	No	$2.00	$10.00	$0.20$2.50 write
Google Cloud	EU	No	$2.20	$11.00	$0.22$2.75 write

Uptime and availability

Claude Sonnet 5 runs on 4 independently monitored routes through the Opper gateway. A direct integration leaves you on one of them, the gateway serves whichever is healthy.

100%effective uptime, last 30 days

Averaged across these routes on their own, a single provider reached 95.77% over the same window.

Daily status through the gateway, which serves each request from whichever route is healthy.

4 monitored providers serve Claude Sonnet 5.

Measured over the last 30 days from each provider's official status feed via StatusGator. Refreshed hourly. See uptime for every provider Opper monitors.

Data handling per route

Each route hosting Claude Sonnet 5 has its own privacy posture, residency, and GDPR terms. Postures are maintained by Opper with a last-verification timestamp.

Anthropic — United States🇺🇸

Zero data retention with abuse monitoring: prompts and outputs are kept for abuse monitoring only, for a window the provider does not state, and are not used for training. No training on customer data. US; SCCs; DPA available.

Zero data retention: With abuse monitoring, window not stated.
Training: No training on customer data.
Logging: Abuse monitoring
Abuse monitoring: On by default, holds flagged content, 730 days, a person can view samples
Caching: Content cached for replay
GDPR DPA: DPA available
Transfer mechanism: SCCs

AWS Bedrock — Sweden🇸🇪

Zero data retention: nothing is logged, held for abuse monitoring or used for training. No training on customer data. EU; DPA available.

Zero data retention: Yes. Nothing is logged, held for abuse monitoring or used for training.
Training: No training on customer data.
Logging: None
Abuse monitoring: Always on, keeps nothing
GDPR DPA: DPA available
Transfer mechanism: Not applicable — data stays in EU

Azure — Multi-region

Zero data retention with abuse monitoring: nothing is logged or used for training; content flagged by abuse monitoring is held for review. No training on customer data. GLOBAL; SCCs; DPA available.

Zero data retention: With abuse monitoring, flagged content held.
Training: No training on customer data.
Logging: None
Abuse monitoring: On by default, holds flagged content, 730 days, a person can view samples
Caching: Content cached for replay
GDPR DPA: DPA available
Transfer mechanism: SCCs

Google Cloud — Multi-region

Zero data retention: With abuse monitoring, window not stated.
Training: No training on customer data.
Logging: Abuse monitoring
Abuse monitoring: On by default, holds flagged content, 90 days, a person can view samples
GDPR DPA: DPA available
Transfer mechanism: SCCs

Google Cloud — European Union🇪🇺

Zero data retention: With abuse monitoring, window not stated.
Training: No training on customer data.
Logging: Abuse monitoring
Abuse monitoring: On by default, holds flagged content, 90 days, a person can view samples
GDPR DPA: DPA available
Transfer mechanism: Not applicable — data stays in EU

Benchmarks

Independent benchmark scores — composite indices for reasoning, coding, and math, plus individual eval scores where available.

Global rank#46 of 644 LLMs

TierStrong

Output speed82 tok/s

First token118.14s

Intelligence Index38.2

Coding Index71.5

Reasoning & knowledge

GPQA Diamond

91%

Humanity's Last Exam

41%

Long-context reasoning

82%

Coding

SciCode

54%

See full leaderboard →Benchmarks via Artificial Analysis · View on AA

Get started

Call Claude Sonnet 5 through the Opper gateway with one API key. Opper is drop-in compatible with the OpenAI, Anthropic and Google AI SDKs.

Claude Sonnet 5 is a premium model on Opper. Sign up needs no credit card: you get an API key straight away and the free models work in the playground and the API. Add a card to use premium models, pay-as-you-go with no minimum.

Set it up with your agent

Copy this and paste it into a coding agent like Claude Code, Cursor or Codex and it'll wire up Opper for you.

Or call it directly

1import OpenAI from "openai";
2
3const client = new OpenAI({
4  apiKey: process.env.OPPER_API_KEY,
5  baseURL: "https://api.opper.ai/v3/compat",
6});
7
8const completion = await client.chat.completions.create({
9  model: "claude-sonnet-5",
10  messages: [{ role: "user", content: "Hello" }],
11});
12console.log(completion.choices[0].message.content);