Claude Opus 4.5

Language Proprietary

Benchmarks

About Claude Opus 4.5

Claude Opus 4.5 is an AI model developed by Anthropic, in the language category, released in 2025, made available as a proprietary (API-only) model.

On this page you'll find Claude Opus 4.5's full specifications, including 8 benchmark results. Review provider pricing and benchmark scores below, or compare Claude Opus 4.5 head-to-head with other language models.

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Claude Opus 4.5 benchmark scores▶

Compare on the benchmark table →

Benchmark	Category	Score	Variant
OSWorld	agentic	66.26	p@1-avg@5
Terminal-Bench 2.0	agentic	59.3%
SWE-bench Verified	code	80.9%
MMMLU	general	90.8%
MMMU	multimodal	80.7%
ARC-AGI-2	reasoning	37.6%
GPQA Diamond	reasoning	87%
Humanity's Last Exam	reasoning	43.2%	with-search

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Frequently asked questions

What is Claude Opus 4.5? ▶

Claude Opus 4.5 is an AI model developed by Anthropic, in the language category, released in 2025. It is tracked on GenAIList with its specifications, benchmark scores and provider pricing.

Who created Claude Opus 4.5? ▶

Claude Opus 4.5 was developed by Anthropic and released in 2025.

Is Claude Opus 4.5 open source or proprietary? ▶

Claude Opus 4.5 is a proprietary model. It is accessed through an API rather than by downloading the weights.

How much does Claude Opus 4.5 cost? ▶

Pricing for Claude Opus 4.5 depends on the provider. See the providers table on this page for the latest API rates.

How does Claude Opus 4.5 perform on benchmarks? ▶

Claude Opus 4.5 is benchmarked across 8 evaluations on GenAIList, including OSWorld (66.26). See the full benchmark table below and compare it with other models.