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Claude Opus 5API
Claude Opus 5 (Anthropic): live API pricing, context window and the best open-source alternatives, tracked daily by OpenSourceAI.tech.
Prices update automatically — checked hourly against provider list prices.
Benchmarks & performance
Independent benchmark scores for Claude Opus 5, measured by Artificial Analysis. Higher is better. Measurement mode: Adaptive Reasoning, Max Effort.
About this model
Claude Opus 5 is a commercial AI model by Anthropic. The specifications below are tracked automatically: pricing is refreshed hourly from public list prices, so the numbers on this page reflect the current cost of using the model through its API.
Frequently asked questions
What is Claude Opus 5?
Claude Opus 5 is an AI language model from Anthropic. It is a proprietary model, available through an API. It scores 60.7 on the Artificial Analysis intelligence index.
Is Claude Opus 5 free?
Claude Opus 5 is not free: it costs $5 per million input tokens and $25 per million output tokens. Open-weight alternatives can be self-hosted at no per-token cost.
What is Claude Opus 5 good at?
Independent benchmarks from Artificial Analysis give it GPQA 93.2%, Humanity's Last Exam 52.6%, Long Context Reasoning 70%, SciCode 55.7%, τ-Bench Banking 30.3%, Terminal-Bench 89.1%. It is particularly used for code generation.
How fast is Claude Opus 5?
It generates about 57.3 tokens per second, with a median 28.73s delay before the first token. Measured independently by Artificial Analysis.
Open-source alternatives
Depending on your workload, an open-weight model that you can self-host may cut costs dramatically or remove per-token pricing entirely. Our comparison pages put this model side by side with the strongest open-source contenders.