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Claude Opus 4API
Claude Opus 4 (Anthropic): live API pricing, context window and the best open-source alternatives, tracked daily by olud.ai.
Prices update automatically — checked hourly against provider list prices.
Benchmarks & performance
Independent benchmark scores for Claude Opus 4, measured by Artificial Analysis. Higher is better. Measurement mode: Reasoning.
About this model
Claude Opus 4 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 4?
Claude Opus 4 is an AI language model from Anthropic. It is a proprietary model, available through an API. It scores 31 on the Artificial Analysis intelligence index.
Is Claude Opus 4 free?
Claude Opus 4 is not free: it costs $15 per million input tokens and $75 per million output tokens. Open-weight alternatives can be self-hosted at no per-token cost.
What is Claude Opus 4 good at?
Independent benchmarks from Artificial Analysis give it GPQA 79.6%, MMLU-Pro 87.3%, Humanity's Last Exam 11.7%, Long Context Reasoning 33.7%, LiveCodeBench 63.6%, SciCode 39.8%, MATH-500 98.2%, AIME 75.7%, AIME 2025 73.3%, IFBench 53.7%, τ²-Bench 73.4%, Terminal-Bench Hard 31.1%. It is particularly used for mathematical reasoning.