Velokey

Claude Sonnet 4.6

AnthropicChatin 2.4 · out 12 Credits / 1M tokens≈$2.4 / $12Available
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Claude Sonnet 4.6 is Anthropic's model refining coding, computer use, and long-context reasoning, with a 1M-token context in beta. Access it through Velokey's unified endpoint with below-list pricing.

1M-token contextLess overengineeringHuman-level computer useMore polished frontend

Use cases

Deep codebase work & bug fixing · Enterprise documents & financial analysis

Input

Text

Output

Text

Billing

Per token

0.7
02
2048
2568192
claude-sonnet-4-6

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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 4.6 API

Access Anthropic's Sonnet 4.6 on Velokey — more refined coding, a 1M-token context, human-level computer use, and more polished frontend output, with a unified endpoint and below-list pricing for production apps.

Meet Claude Sonnet 4.6 and its API access

Claude Sonnet 4.6 is Anthropic's model released on February 17, 2026, refining coding, computer use, and long-context reasoning. It codes with less overengineering, follows instructions better, and is more consistent — preferred over Sonnet 4.5 roughly 70% of the time in Claude Code testing. It ships with a 1M-token context window (beta), reaches human-level computer use, produces more polished frontend output, and keeps the same price. Velokey provides an affordable, easy-to-integrate Claude Sonnet 4.6 API: a unified chat endpoint, a clear request flow, and below-list pricing for production systems, agent pipelines, and automation tools.

More refined, more obedient coding

Markedly less overengineering and laziness, better instruction-following, higher consistency, and fewer false success claims. Preferred over Sonnet 4.5 ~70% of the time and over Opus 4.5 ~59% of the time in Claude Code testing.

View Documentation →
More refined, more obedient coding

Human-level computer use

Reaches ~94% accuracy on an insurance benchmark, completing complex spreadsheets and multi-step web forms like a person, with stronger prompt-injection resistance than 4.5 — fit for automating office flows.

View Documentation →
Human-level computer use

1M-token long-context reasoning

Ships with a 1M-token context window (beta) to reason effectively and coherently across entire codebases, long contracts, and dozens of research papers.

View Documentation →
1M-token long-context reasoning

More polished frontend & visual output

Frontend output is notably more polished with better layouts and animations, needing fewer iterations for production quality; code execution, memory, programmatic tool calling, and tool search are now generally available.

View Documentation →
More polished frontend & visual output

How to deploy the Claude Sonnet 4.6 API on Velokey

Get started with just a few steps.

1

Sign up and get an API Key

Sign in to the Velokey console to generate an API Key that authenticates every request sent to Claude Sonnet 4.6.

2

Configure request parameters

Set model to claude-sonnet-4-6 and submit messages. Enable the 1M-token beta for very long context; code execution, memory, and tool search are generally available.

3

Integrate and start calling

Send requests to Velokey's unified /v1/chat/completions endpoint to power assistants, agents, and automation, with usage managed in one console.

Real-world use cases for Claude Sonnet 4.6

From engineering to enterprise processes, covering many high-autonomy scenarios.

Deep codebase work & bug fixing

With a 1M-token context and more refined coding, fit for development, refactoring, and bug fixing across an entire codebase.

Complex agents & long-horizon planning

Fit for complex agentic workflows and long-horizon planning, more stable with now-GA tool capabilities.

Computer use & form automation

Human-level computer use — fit for spreadsheets, multi-step web forms, and office automation.

Enterprise document comprehension

Matches Opus 4.6 on enterprise document comprehension (OfficeQA) — fit for retrieval, synthesis, and QA across long documents.

Financial analysis & data extraction

Fit for financial analysis and structured data extraction that need high reliability.

Insurance & healthcare flows

Human-level computer use and stronger prompt-injection resistance — fit for multi-step insurance and healthcare compliance flows.

Why choose Velokey for Claude Sonnet 4.6

Discount on list price

Call Claude Sonnet 4.6 at a lower price on Velokey — pay-as-you-go with no forced subscription, reducing upfront cost.

Unified API interface

One API Key accesses Claude Sonnet 4.6 and other models — no juggling multiple accounts and keys, simplifying integration.

Complete docs and migration guidance

Endpoint references, parameter details, and migration examples help you upgrade smoothly from 4.5 and adopt long context and tools.

Stable and highly available

Automatic failover and stable fallback routes maintain availability when the primary route is down, keeping production reliable.

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-4-6",
    "messages": [{"role": "user", "content": "Hello!"}],
    "temperature": 0.7
  }'

Response Example

{
  "id": "req_abc123",
  "model": "claude-sonnet-4-6",
  "created": 1234567890,
  "data": { ... }
}

Claude Sonnet 4.6 API FAQ

What's improved over Sonnet 4.5?

Less overengineering, better instruction-following, higher consistency, and fewer false success claims in coding (preferred over Sonnet 4.5 ~70% of the time in Claude Code testing); a 1M-token context by default, human-level computer use, more polished frontend output, and unchanged pricing.

How does the 1M-token context work?

Sonnet 4.6 ships with a 1M-token context window (beta) to reason effectively across entire codebases, long contracts, and dozens of papers. Putting static content first and dynamic content last lowers input cost on long workflows.

How good is computer use?

It reaches ~94% accuracy on an insurance benchmark, completing complex spreadsheets and multi-step web forms like a person, with stronger prompt-injection resistance than 4.5.

What tool capabilities are available?

Code execution, memory, programmatic tool calling, and tool search are now generally available; web search/fetch auto-filter results via code execution, and Claude Excel supports MCP connectors.

How is it billed on Velokey?

Official pricing is $3 input / $15 output per million tokens, the same as 4.5. This page's pricing area shows the current Velokey price, billed by input and output tokens with a discount on list price.

Start building with Claude Sonnet 4.6 today

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

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