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Anthropic: Claude Opus 4.1

Claude Opus 4.1 is an updated version of Anthropic’s flagship model, offering improved performance in coding, reasoning, and agentic tasks. $15 per million input tokens, $75 per million output tokens. 200,000 token context window, maximum output of 32,000 tokens. Higher uptime with 3 providers. Includes independent benchmarks from Artificial Analysis.

View source on OpenRouter
Overview

Model specifications

Context
200,000 tokens
Maximum output
32,000 tokens
Architecture
text+image+file->text
Tokenizer
Claude
Knowledge cutoff
2025-01-31
Moderated
Yes
OPENROUTER

Complete pricing

Synchronized OpenRouter rates. Token prices are shown per one million tokens.

Input
$15
/M tokens
Output
$75
/M tokens
Cache read
$1.5
/M tokens
Cache write
$18.75
/M tokens
Cache Write (1h)
$30
/M tokens
API

Model configuration

Reasoning

Moderated
No
Default parameters
No
API

Quick start

Call this exact model ID through OpenRouter’s OpenAI-compatible API.

curl https://openrouter.ai/api/v1/chat/completions \
  -H "Authorization: Bearer $OPENROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"anthropic/claude-opus-4.1","messages":[{"role":"user","content":"Hello!"}]}'
Capabilities

Input → Output

Input
imagetextfile
Output
text
Reasoning

No

API

Supported API parameters

include_reasoningmax_tokensreasoningstoptemperaturetool_choicetoolstop_ktop_p
Available providers

2 providers

Live providers on OpenRouter

Provider availability, latency, throughput and routing can change continuously. Open the source page for current operational data.

OpenRouter

Amazon Bedrock

unknown
Context
200K
Maximum output
32K
Input
$15.00
Output
$75.00
Cache read
$1.50
Cache write
$18.75

Google

unknown
Context
200K
Maximum output
32K
Input
$15.00
Output
$75.00
Cache read
$1.50
Cache write
$18.75
anthropic

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Claude Opus 5 (Fast)

Fast-mode variant of Opus 5 - identical capabilities with higher output speed at 2x pricing relative to regular Opus 5. Learn more in Anthropic's docs: https://platform.claude.com/docs/en/build-with-claude/fast-mode

Context
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Input: $10.00Output: $50.00per 1M tokens
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Claude Opus 5

Claude Opus 5 is Anthropic’s flagship model for demanding reasoning, coding, and long-horizon agentic work. It is particularly strong at end-to-end software tasks, code review and bug finding, visual analysis...

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Input: $5.00Output: $25.00per 1M tokens
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Claude Opus 5 (batch)

Claude Opus 5 is Anthropic’s flagship model for demanding reasoning, coding, and long-horizon agentic work. It is particularly strong at end-to-end software tasks, code review and bug finding, visual analysis...

Context
1M
Input
text · image · file
Output
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Input: $2.50Output: $12.50per 1M tokens
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Anthropic: Claude Sonnet 5

Sonnet 5 is Anthropic's most capable Sonnet-class model, with frontier performance across coding, agents, and professional work. It supports adaptive thinking with selectable reasoning effort levels (low, medium, high, max,...

Context
1M
Input
text · image · file
Output
text
Input: $2.00Output: $10.00per 1M tokens
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