# Claude Opus 4.6

> Anthropic's model for coding and long-running professional tasks, built for agents that handle entire workflows.

## Key facts

- Model author: Anthropic
- Input: $4.8404 per 1M tokens (starting price)
- Output: $24.2017 per 1M tokens (starting price)
- Cached input: $0.484 per 1M tokens
- Context window: 1,000,000 tokens
- Maximum output: 128,000 tokens
- Input modalities: image, text
- Output modalities: text
- Capabilities: reasoning, tools, vision
- Released: 2026-02-04
- Knowledge cutoff: May 2025
- Model IDs: `anthropic/claude-opus-4-6`, `jd/claude-opus-4-6`
- Model page: https://www.realrelay.ai/model/anthropic/claude-opus-4-6

## Overview

Claude Opus 4.6 is a model from Anthropic built for coding and long-running professional tasks. It is designed for agents that operate across entire workflows rather than single prompts. It supports reasoning, tool calling and image input, and offers a 1M-token context window for large codebases and document sets.

Claude Opus 4.6 has a 1M-token context window and can generate up to 128K output tokens. It accepts text and image input and returns text output. It was released on February 4, 2026. Its knowledge cutoff is May 2025.

## Capabilities

Claude Opus 4.6 supports reasoning, tool calling and image understanding. It accepts text and image as input and produces text as output.

Because it is built for whole workflows, Claude Opus 4.6 combines reasoning with tool calling so an agent can plan a task, call tools, check the results and continue. Image input adds screenshots, charts and scanned pages to what it can read.

## Pricing

Claude Opus 4.6 starts from $4.84 per 1M input tokens and from $24.20 per 1M output tokens. Cache reads start from $0.484 per 1M tokens.

Pricing is tiered, and the price shown is the starting tier. Claude Opus 4.6 is available through RealRelay's OpenAI-compatible API.

## Use cases

Use Claude Opus 4.6 for coding agents that handle an entire workflow, from reading a repository and planning a change to calling tools that run tests, inside its 1M-token context window.

For long-running professional tasks, it can work through lengthy reports together with screenshots and charts, then produce a structured result for a person to review.

## Call it

OpenAI-compatible chat completions:

```bash
curl https://www.realrelay.ai/v1/chat/completions \
  -H "Authorization: Bearer $REALRELAY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "anthropic/claude-opus-4-6", "messages": [{"role": "user", "content": "Hello"}]}'
```

## FAQ

### What is Claude Opus 4.6?

Claude Opus 4.6 is a model from Anthropic built for coding and long-running professional tasks. It supports reasoning, tool calling and image understanding and accepts text and image input.

### How much does Claude Opus 4.6 cost?

Claude Opus 4.6 starts from $4.84 per 1M input tokens and from $24.20 per 1M output tokens, with cache reads from $0.484 per 1M tokens. Pricing is tiered, and these are the starting-tier prices.

### What is the context window of Claude Opus 4.6?

Claude Opus 4.6 has a 1M-token context window and can generate up to 128K tokens in a single response.

### What inputs and outputs does Claude Opus 4.6 support?

Claude Opus 4.6 accepts text and image input and returns text output.

### Does Claude Opus 4.6 support tool calling?

Yes. Claude Opus 4.6 supports tool calling, so it can call functions you define and use the results in multi-step tasks. It also supports reasoning and image understanding.

### When was Claude Opus 4.6 released?

Claude Opus 4.6 was released on February 4, 2026. Its knowledge cutoff is May 2025.

### How do I call Claude Opus 4.6 via the API?

Call Claude Opus 4.6 through RealRelay's OpenAI-compatible API using the model ID anthropic/claude-opus-4-6.