What is Anthropic: Claude Opus 4.6's context window?

Anthropic: Claude Opus 4.6 supports a context window of 1,000,000 tokens, allowing you to process large documents and maintain long conversations.

How to use Anthropic: Claude Opus 4.6 API via Ofox?

Simply set your base URL to https://api.ofox.run/v1 and use your Ofox API key. The API is OpenAI-compatible — just change the base URL and API key in your existing code.

Anthropic: Claude Opus 4.6

Name: Anthropic: Claude Opus 4.6
Brand: anthropic
Price: 5 USD
Availability: InStock
Rating: 5 (1 reviews)

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anthropic/claude-opus-4.6

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Claude Opus 4.6 is Anthropic's strongest model for coding and long-running professional tasks, released on 2026-02-05. It is built for agents that operate across entire workflows rather than single prompts, making it effective for large codebases, complex refactors, and multi-step debugging, with deeper contextual understanding and stronger problem decomposition. Beyond coding, it produces near-production-ready documents, plans, and analyses in a single pass and stays coherent across very long outputs. Supports reasoning, vision, tool use, PDF input, and prompt caching. Context window: 1M tokens, output: 128K. Available via OpenAI and Anthropic protocols.

Context Window

Max Output Tokens

128K

Released

2026-02-05

Capabilities

VisionFunction CallingReasoningPrompt CachingPDF Input

Available Providers

Bedrock

Supported Protocols

openaianthropic

Providers

Bedrock

Input Tokens

$5/M

Output Tokens

$25/M

Cache Read

$0.5/M

Cache Write (5 min)

$6.25/M

Cache Write (1 hour)

$10/M

Web Search

$0.015/R

Protocols

openai/v1/chat/completions/v1/responses

anthropic

Code Examples

import anthropic

client = anthropic.Anthropic(
    base_url="https://api.ofox.run/anthropic",
    api_key="YOUR_OFOX_API_KEY",
)

message = client.messages.create(
    model="anthropic/claude-opus-4.6",
    max_tokens=1024,
    messages=[
        {"role": "user", "content": "Hello!"}
    ],
)

print(message.content[0].text)

Uptime & Status

Benchmarks

LMArena ↗Evaluated as claude-opus-4-6

Anthropic: Claude Opus 4.6 scores 1498 in the Overall category of the LMArena text leaderboard (style control), ranking #4 of 374 models based on 63,487 human preference votes (updated 2026-07-12).

Benchmark scores for claude-opus-4-6 on LMArena
Category	95% CI	Rank	Votes
Overall	1494–1501	#4 of 374	63,487
Hard Prompts	1523–1532	#3 of 374	40,530
Coding	1542–1554	#5 of 369	17,517
Math	1493–1514	#5 of 362	3,537
Creative Writing	1471–1485	#7 of 372	10,341
Instruction Following	1494–1505	#4 of 374	20,410
Chinese	1536–1559	#3 of 344	3,242

Source: LMArena · CC BY 4.0 · Updated 2026-07-12 · Methodology ↗ · Ranks compare models within each category of the LMArena text leaderboard (style control). Scores come from third-party human preference evaluations, not from OFOX.