Anthropic: Claude Opus 4.8 (Fast)
Anthropic's flagship model. Long-context specialist with 1M window.
Scores by test
Methodology →What you need to know
Claude Opus 4.8 (Fast) is a top-tier reasoning model, ranking second overall among 107 evaluated models. Its primary differentiator is a near-perfect performance profile across complex cognitive tasks, specifically in strategic analysis, agentic planning, and creative problem solving. With a 1M token context window and a 5/5 score in long context handling, it is designed for high-density information retrieval and processing.
The model excels in precision-heavy workflows, achieving maximum scores in structured output, tool calling, and faithfulness. This makes it highly reliable for automating technical pipelines where output format and factual accuracy are non-negotiable. However, it shows a relative weakness in simple classification tasks, where it scores a 3/5, suggesting it may be over-engineered for basic labeling or categorization duties.
At a blended cost of $40.00/MTok, this is an expensive model. The high price point reflects its position as a frontier-class tool rather than a utility model. Developers are paying a premium for high-level reasoning and reliability rather than raw throughput or cost-efficiency.
Use this model if your application requires complex agentic planning, high-fidelity structured data, or the analysis of massive datasets within a single prompt. Skip this model if your primary use case is simple text classification or if your budget requires a low-cost per-token footprint.
Strengths — Top 3
Relative weaknesses — Bottom 3
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