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Claude Opus 4.6

AnthropicChatin 4 · out 20 Credits / 1M tokens≈$4 / $20Available
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Claude Opus 4.6 is Anthropic's flagship with broad gains in coding, long context, and autonomous tasks, adding a 1M-token context (beta). Access it through Velokey's unified endpoint with below-list pricing.

1M-token context128K-token outputAdaptive extended thinkingAgentic coding leader

Use cases

Agentic coding & code modernization · Financial analysis & knowledge work

Input

Text

Output

Text

Billing

Per token

0.7
02
2048
2568192
claude-opus-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 tokens4 Credits≈$45 Credits-20%
Output/1M tokens20 Credits≈$2025 Credits-20%
Cache Read/1M tokens0.4 Credits≈$0.40.5 Credits-20%
Cache Write/1M tokens5 Credits≈$56.25 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 Opus 4.6 API

Access Anthropic Opus 4.6 on Velokey — agentic coding leader, 1M-token long-context, and adaptive extended thinking, with a unified endpoint and a discount on official pricing for production-ready apps.

Meet Claude Opus 4.6 and its API integration

Claude Opus 4.6 is Anthropic's flagship model, released in February 2026. It brings comprehensive enhancements in coding, long-context, and autonomous tasks, supporting a 1M-token context window (beta), 128K-token max output, and adaptive extended thinking. It leads in agentic coding, long-document retrieval, and multi-step autonomous tasks, outperforming competitors on Terminal-Bench 2.0, GDPval-AA, BrowseComp, and more, at the same price as predecessors. Velokey offers an affordable, integration-friendly Claude Opus 4.6 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.

Enhanced coding & agentic capabilities

Stronger planning, sustained agentic task execution, and improved code review & debugging. Leads on agentic coding evals like Terminal-Bench 2.0, fit for long-running coding tasks, large codebase navigation, and code modernization projects.

View Documentation →
Enhanced coding & agentic capabilities

1M-token long context

Supports a 1M-token context window (beta) with reduced 'context rot' and better retrieval across large document sets. MRCR v2 8-needle 1M variant: 76% vs. Sonnet 4.5's 18.5%.

View Documentation →
1M-token long context

Adaptive extended thinking

The model decides when to use extended reasoning: fast responses for simple tasks, deep thinking for complex problems. Four effort levels (low/medium/high/max) to tune by cost, latency, and task difficulty.

View Documentation →
Adaptive extended thinking

Autonomous multi-step task completion

Reliably completes autonomous multi-step tasks across coding, research, financial analysis, and office productivity, outperforming GPT-5.2 by ~144 Elo on GDPval-AA and other knowledge-work evals.

View Documentation →
Autonomous multi-step task completion

How to deploy the Claude Opus 4.6 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 Opus 4.6.

2

Configure request parameters

Set model to claude-opus-4-6 and submit messages. For extended thinking, set thinking to adaptive and use effort (default high) to control depth. Standard context (within 200K) billed at standard pricing; 1M beta incurs premium pricing.

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 Opus 4.6 real-world use cases

From engineering to knowledge work, across many high-autonomy scenarios.

Agentic coding

Leads on agentic coding evals like Terminal-Bench 2.0, fit for long-running autonomous coding tasks, large codebase navigation, and code modernization.

Financial analysis

Outperforms GPT-5.2 by ~144 Elo on GDPval-AA and other knowledge-work evals, fit for financial modeling, data analysis, and high-reliability work.

Legal document analysis

Long-context with reduced context rot makes it fit for retrieval and analysis across large contracts and legal documents.

Research & multi-source analysis

Best performance on BrowseComp, fit for locating hard-to-find information online, cross-source research, and long-document synthesis.

Cybersecurity

Fit for vulnerability detection and other cybersecurity scenarios, with enhanced security safeguards and a low over-refusal rate for reliable handling of security tasks.

Office productivity

Supports automation for Excel, PowerPoint, and other office scenarios, fit for multi-step tasks across spreadsheets, documents, and presentations.

Why choose Velokey for Claude Opus 4.6

A discount on official pricing

Call Claude Opus 4.6 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 Opus 4.6 and other models — no juggling multiple accounts and keys, simplifying integration.

Thorough docs and guidance

Endpoint references, parameter details, and best practices help you integrate quickly and make the most of Opus 4.6's 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-opus-4-6",
    "messages": [{"role": "user", "content": "Hello!"}],
    "temperature": 0.7
  }'

Response Example

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

Claude Opus 4.6 API FAQ

What's improved in Claude Opus 4.6?

Compared to predecessors, it brings comprehensive enhancements in coding (planning, sustained agentic execution, code review), long-context (reduced context rot), and autonomous tasks. It leads on Terminal-Bench 2.0, GDPval-AA, BrowseComp, and more, at the same price.

How is the 1M-token context billed?

Standard context (within 200K tokens) is billed at $5 input / $25 output per million tokens. The 1M-token context window is a beta feature (Claude Platform only); tokens beyond 200K are billed at a higher long-context rate — see the pricing section on this page.

What is adaptive extended thinking?

Opus 4.6 decides when to use extended reasoning: simple tasks get direct responses, complex problems get deep thinking first. Set thinking to adaptive and use effort (low/medium/high/max) to control depth, default high.

How do I choose an effort level?

low and medium fit cost- or latency-sensitive scenarios; high (default) fits most tasks; max is reserved for the hardest problems. For agentic coding and complex reasoning, start with high.

How is it billed on Velokey?

The pricing section on this page shows the current Velokey price for Claude Opus 4.6, billed by input and output tokens with a discount on top of official pricing. Credits are managed centrally in your Velokey account.

Start building with Claude Opus 4.6 today

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

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