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Claude Opus 4.1API
Claude Opus 4.1 is an updated version of Anthropic’s flagship model, offering improved performance in coding, reasoning, and agentic tasks.
Prices update automatically — checked daily against provider list prices.
- $30 per 1M tokens, assuming 3 input for 1 output the convention used by Artificial Analysis
- cheaper than 6% of the 192 commercial models tracked here
- 26 of 28 Anthropic models tracked here, from cheapest
Benchmarks & performance
Independent benchmark scores for Claude Opus 4.1, measured by Artificial Analysis. Higher is better. Measurement mode: Reasoning.
Models at this level cost $1.2 per 1M tokens (median of 21) — this one costs $30.
Cheaper and better on this index: Claude Opus 5 (Fast) · Claude Opus 5 · Claude Opus 5 (batch) and 97 more
About this model
Claude Opus 4.1 is a commercial AI model by Anthropic. The specifications below are tracked automatically: pricing is refreshed daily 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 4.1?
Claude Opus 4.1 is an AI language model from Anthropic. It is a proprietary model, available through an API. It scores 34.5 on the Artificial Analysis intelligence index.
Is Claude Opus 4.1 free?
Claude Opus 4.1 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 4.1 good at?
Independent benchmarks from Artificial Analysis give it GPQA 80.9%, MMLU-Pro 88%, Humanity's Last Exam 12.5%, Long Context Reasoning 73.3%, LiveCodeBench 65.4%, SciCode 40.9%, AIME 2025 80.3%, IFBench 55.4%, τ²-Bench 71.4%, Terminal-Bench Hard 34.3%. It is particularly used for mathematical reasoning.