Claude Opus 4.5

Nov 2025
Claude Opus 4.5
Compare in
on
—per task?
$5 / $25per 1M in / outcache $0.50
51 tok/sfirst token in 1.2 s?
200Kcontext

Rankingin non-thinking mode?

Benchmarks

all categories
Chat & Knowledge
MMLU-Pro · official boardlab87.3
Coding
SWE-bench Pro (edition unstated)lab57.1
Agents & Tool Use
Writing & Language
Vision & Documents

FAQ

How much does Claude Opus 4.5 cost?›

$5 per 1M input tokens and $25 per 1M output tokens; cached input $0.50 per 1M.

Is Claude Opus 4.5 free to use?›

There is no free API; the cheapest paid price is $5 per 1M input tokens.

How good is Claude Opus 4.5, and what is it best at?›

#153 of 334 in Chat & Knowledge, #6 of 19 in Coding, #7 of 16 in Agents & Tool Use, #12 of 195 in Writing & Language, #67 of 124 in Vision & Documents. Strongest at: Tool calling, Knowledge.

Is Claude Opus 4.5 better than Claude Sonnet 4.5?›

On BFCL v4, Claude Opus 4.5 scores 77.5 vs 73.2 — higher.

How can I use Claude Opus 4.5?›

Through the API of Amazon Bedrock, Anthropic, Azure, Claude Platform on AWS, Google.

What is the context window of Claude Opus 4.5?›

200K tokens, with up to 64K output tokens.

When was Claude Opus 4.5 released? Is there a newer version?›

Released 2025-11-24. It has been superseded by Claude Opus 4.6.

Is Claude Opus 4.5 open source?›

No, Claude Opus 4.5 is a closed model available through an API. The closest open-weights option here is Kimi K2 0711.

Can Claude Opus 4.5 read images?›

It accepts text and images, PDF files as input.

What is Claude Opus 4.5?›

Claude Opus 4.5 is a closed language model from Anthropic, released Nov 2025.

What are the best alternatives to Claude Opus 4.5?›

Claude Sonnet 4.5 (cheaper), Kimi K2 0711 (open weights).