Velokey

Claude Sonnet 5

AnthropicChatin 2.4 · out 12 Credits / 1M tokens≈$2.4 / $12Available
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Claude Sonnet 5 is Anthropic's latest agentic model, a substantial upgrade over Sonnet 4.6 with performance approaching Opus 4.8 at a lower cost. Access it through Velokey's unified endpoint with below-list pricing.

Near Opus 4.8 qualityAutonomous multi-step executionComputer use and tool useCost-efficient agentic runs

Use cases

Agentic engineering assistants · End-to-end workflow automation

Input

Text, image

Output

Text

Billing

Per token

0.7
02
2048
2568192
claude-sonnet-5

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Sign up to get $0.5 in free credits — about 20 free images

Pricing details

Transparent usage-based pricing with no hidden fees.

Detailed Pricing

Usage-based pricing breakdown

SpecPriceOfficialSavings
Input/1M tokens2.4 Credits≈$2.43 Credits-20%
Output/1M tokens12 Credits≈$1215 Credits-20%
Cache Read/1M tokens0.24 Credits≈$0.240.3 Credits-20%
Cache Write/1M tokens3 Credits≈$33.75 Credits-20%

Billing Rules

  • Output price varies by model, resolution, quality, duration, or token usage.
  • Uploaded reference files may be charged separately when supported.
  • Add-on capabilities such as web search or image search may be billed per request.
  • Token-based models are billed by input and output tokens.
  • If the primary route is unavailable, Velokey may automatically switch to a stable fallback route when possible.
  • Usage is pay-as-you-go with transparent credit deduction.

* Final cost depends on the generated result.

Related models

Explore other models in the same family.

Affordable Claude Sonnet 5 API

Access Anthropic's latest agentic model on Velokey — planning, tool use, autonomous multi-step execution, and self-verification approaching Opus 4.8 at a lower cost, with a unified endpoint and discount on official pricing for production-ready apps.

Meet Claude Sonnet 5 and its API integration

Claude Sonnet 5 is Anthropic's latest agentic model — a substantial upgrade over Sonnet 4.6 that pushes performance close to Opus 4.8 while staying far more cost-efficient. It excels at planning, tool use across browsers and terminals, autonomous multi-step execution, coding, reasoning, and knowledge work, making it a strong default for agents that need to act reliably at scale.\n\nVelokey offers an affordable, integration-friendly Claude Sonnet 5 API: a unified chat endpoint, a clean request flow, and a discount on top of official pricing — ready to drop into production systems, agent pipelines, and automation tools.

End-to-end agentic automation

Completes multi-step workflows that previously stalled — such as updating databases and sending communications in one run — planning and executing across systems with minimal hand-holding.

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End-to-end agentic automation

Stronger computer use

Shows substantial gains on OSWorld-Verified, operating real interfaces, browsers, and terminals more reliably to carry tasks through to completion.

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Stronger computer use

Sustained coding and debugging

Handles sustained coding and debugging in complex, brownfield environments, tracing failures to their root cause instead of applying surface-level patches.

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Sustained coding and debugging

Self-verification

Unpromptedly checks and validates its own output before finishing, catching mistakes earlier and raising trust in autonomous runs.

View Documentation →
Self-verification

How to deploy the Claude Sonnet 5 API on Velokey

Just a few steps to start calling.

1

Sign up and get an API Key

Sign in to the Velokey dashboard to generate an API Key that authenticates every request sent to Claude Sonnet 5.

2

Configure your request

Set model to claude-sonnet-5 and submit messages. For agentic use, define your tools so the model can plan and call them across multiple steps, and raise effort for harder planning and reasoning.

3

Integrate and start calling

Send requests to Velokey's unified /v1/chat/completions endpoint to power assistants, agents, and automation, and manage usage from one dashboard.

Claude Sonnet 5 real-world use cases

From engineering to operations, across many high-autonomy scenarios.

Agentic engineering assistants

Sustains long coding and debugging sessions in real, brownfield codebases, tracing failures to root cause and advancing multi-step engineering tasks autonomously.

End-to-end workflow automation

Completes workflows that span multiple systems in one run — such as updating databases and sending communications together — that previously stalled midway.

Agentic search

Approaches Opus 4.8 at medium effort on agentic search benchmarks like BrowseComp while staying cost-efficient, gathering and structuring findings across sources.

Computer use

With substantial gains on OSWorld-Verified, operates browsers, terminals, and real interfaces to carry out tasks end to end.

Knowledge work

Reasons over lengthy materials, breaks down complex problems, and generates structured conclusions for research and analysis workflows.

Reliable automation

Self-verifies its output and shows lower rates of misaligned behavior, a good fit for automation where reliability matters.

Why choose Velokey for Claude Sonnet 5

A discount on official pricing

Call Claude Sonnet 5 at a lower price on Velokey — pay-as-you-go with no mandatory subscription, reducing upfront cost.

Unified API interface

One API Key accesses Claude Sonnet 5 and other models — no juggling multiple accounts and keys, simplifying integration.

Thorough docs and integration guidance

Endpoint references, parameter details, and tool-use examples help you build reliable agents on Sonnet 5 and make the most of its capabilities.

Stable and highly available

Automatic failover and stable backup routing maintain availability when a primary route is down, keeping production steady.

API Reference

Complete API call examples and parameter descriptions

Endpoint

https://api.velokey.ai/v1/messages

Authentication

Bearer YOUR_API_KEY

Request Example

curl https://api.velokey.ai/v1/messages \
  -X POST \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "claude-sonnet-5",
    "messages": [{"role": "user", "content": "Hello!"}],
    "temperature": 0.7
  }'

Response Example

{
  "id": "req_abc123",
  "model": "claude-sonnet-5",
  "created": 1234567890,
  "data": { ... }
}

Claude Sonnet 5 API FAQ

What's improved in Claude Sonnet 5?

It's a substantial upgrade over Sonnet 4.6, with performance approaching Opus 4.8 at a much lower cost. It's stronger at planning, tool use, autonomous multi-step execution, coding, reasoning, and knowledge work.

What is Claude Sonnet 5 best at?

Agentic work: planning, using tools like browsers and terminals, and running autonomous multi-step tasks. It also handles sustained coding and debugging in complex, brownfield environments and performs strong agentic search.

How good is its computer use?

Claude Sonnet 5 shows substantial gains on OSWorld-Verified, making it more capable at operating real interfaces, browsers, and terminals to complete tasks end to end.

Is it safer than earlier models?

Yes. It shows lower rates of misaligned behavior and substantially reduced cyber capabilities, and it unpromptedly checks and validates its own output before finishing.

How is it billed on Velokey?

Claude Sonnet 5 uses standard pricing of $3 per 1M input tokens and $15 per 1M output tokens, and Velokey applies a discount on top of official pricing. Credits are managed centrally in your Velokey account.

Start building with Claude Sonnet 5 today

Use one API key to access low-cost, stable AI models through Velokey.

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