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Anthropic: Claude Opus 4.5

Source description (English)

Claude Opus 4.5 is Anthropic’s frontier reasoning model optimized for complex software engineering, agentic workflows, and long-horizon computer use. It offers strong multimodal capabilities, competitive performance across real-world coding and...

View source on OpenRouter
Overview

Model specifications

Context
200,000 tokens
Maximum output
64,000 tokens
Architecture
text+image+file->text
Tokenizer
Claude
Knowledge cutoff
Not provided
Moderated
Yes
OPENROUTER

Complete pricing

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

Input
$5
per 1M tokens
Output
$25
per 1M tokens
Cache read
$0.5
per 1M tokens
Cache write
$6.25
per 1M tokens
Cache write (1h)
$10
per 1M tokens
Web search
$10
per 1,000 calls
API

Model configuration

Reasoning

Reasoning required
No
Default parameters
No
API

Quick start

Set OPENROUTER_API_KEY locally. Python requires requests; JavaScript runs in Node.js. Keep the key on the server.

API documentation

curl --fail-with-body https://openrouter.ai/api/v1/chat/completions \
  -H "Authorization: Bearer $OPENROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"anthropic/claude-opus-4.5","messages":[{"role":"user","content":"Hello!"}]}'
Capabilities

Input → Output

Input
fileimagetext
Output
text
Reasoning

No

API

Supported API parameters

include_reasoningmax_completion_tokensmax_tokensreasoningresponse_formatstopstructured_outputstemperaturetool_choicetoolstop_kverbosity
Available providers

6 providers

Checked: September 7, 2026

Live providers on OpenRouter

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

OpenRouter

Claude Platform on AWS

Not provided
Context
200K
Maximum output
64K
Input
$5
Output
$25
Cache read
$0.5
Cache write
$6.25

Azure

Not provided
Context
200K
Maximum output
64K
Input
$5
Output
$25
Cache read
$0.5
Cache write
$6.25

Google

Not provided
Context
200K
Maximum output
64K
Input
$5
Output
$25
Cache read
$0.5
Cache write
$6.25

Amazon Bedrock

Not provided
Context
200K
Maximum output
64K
Input
$5
Output
$25
Cache read
$0.5
Cache write
$6.25

Anthropic

Not provided
Context
200K
Maximum output
64K
Input
$5
Output
$25
Cache read
$0.5
Cache write
$6.25

Amazon Bedrock

Not provided
Context
200K
Maximum output
64K
Input
$5.5
Output
$27.5
Cache read
$0.55
Cache write
$6.875
anthropic

4 models

All models
anthropic logoanthropic

Anthropic: Claude Opus 5.5

Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5. It is particularly strong at multi-step changes in large codebases, code...

Context
1M
Input
text · image · file
Output
text
Input: $4Output: $20per 1M tokens
View model details →
anthropic logoanthropic

Anthropic: Claude Opus 5.5 (batch)

Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5. It is particularly strong at multi-step changes in large codebases, code...

Context
1M
Input
text · image · file
Output
text
Input: $2Output: $10per 1M tokens
View model details →
anthropic logoanthropic

Anthropic: Claude Fable 5.1

Claude Fable 5.1 improves on Claude Fable 5 across the board, with the biggest gains in agentic coding, long-running agentic workflows, and knowledge work: long code refactors, front-end and visual...

Context
1M
Input
text · image · file
Output
text
Input: $10Output: $50per 1M tokens
View model details →
anthropic logoanthropic

Anthropic: Claude Fable 5.1 (batch)

Claude Fable 5.1 improves on Claude Fable 5 across the board, with the biggest gains in agentic coding, long-running agentic workflows, and knowledge work: long code refactors, front-end and visual...

Context
1M
Input
text · image · file
Output
text
Input: $5Output: $25per 1M tokens
View model details →