Grok 4.1 Fast (Reasoning) vs Claude Opus 4.5 (Reasoning): The Ultimate Performance & Pricing Comparison

Deep dive into reasoning, benchmarks, and latency insights.

The Final Verdict in the Grok 4.1 Fast (Reasoning) vs Claude Opus 4.5 (Reasoning) Showdown

After a comprehensive analysis, Claude Opus 4.5 (Reasoning) emerges as the superior choice for users prioritizing raw intelligence and reasoning. However, Grok 4.1 Fast (Reasoning) remains a highly competitive option, especially for scenarios demanding faster response times and cost-efficiency. This detailed Grok 4.1 Fast (Reasoning) vs Claude Opus 4.5 (Reasoning) comparison will break down every critical metric to help you make the best decision.

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Model Snapshot

Key decision metrics at a glance.

Grok 4.1 Fast (Reasoning)

xAI

Reasoning: 9
Coding: 3
Multimodal: 3
Long Context: 5
Blended Price / 1M tokens: $0.000
P95 Latency: 1000ms
Tokens per second: 182.829tokens/sec

Claude Opus 4.5 (Reasoning)

Anthropic

Reasoning: 9
Coding: 5
Multimodal: 4
Long Context: 6
Blended Price / 1M tokens: $0.010
P95 Latency: 1000ms
Tokens per second: 83.923tokens/sec

Overall Capabilities

The capability radar provides a holistic view of the Grok 4.1 Fast (Reasoning) vs Claude Opus 4.5 (Reasoning) matchup. This chart illustrates each model's strengths and weaknesses at a glance, forming a cornerstone of our Grok 4.1 Fast (Reasoning) vs Claude Opus 4.5 (Reasoning) analysis.

This radar chart visually maps the core capabilities (reasoning, coding, math proxy, multimodal, long context) of `Grok 4.1 Fast (Reasoning)` vs `Claude Opus 4.5 (Reasoning)`.

Benchmark Breakdown

For a granular look, this chart directly compares scores across standardized benchmarks. In the critical MMLU Pro test, a key part of the Grok 4.1 Fast (Reasoning) vs Claude Opus 4.5 (Reasoning) debate, Grok 4.1 Fast (Reasoning) scores 90 against Claude Opus 4.5 (Reasoning)'s 90. This data-driven approach is essential for any serious Grok 4.1 Fast (Reasoning) vs Claude Opus 4.5 (Reasoning) comparison.

This grouped bar chart provides a side-by-side comparison for each benchmark metric.

Speed & Latency

Speed is a crucial factor in the Grok 4.1 Fast (Reasoning) vs Claude Opus 4.5 (Reasoning) decision for interactive applications. The metrics below highlight the trade-offs you should weigh before shipping to production.

Time to First Token

Grok 4.1 Fast (Reasoning)300ms

Claude Opus 4.5 (Reasoning)300ms

Tokens per Second

Grok 4.1 Fast (Reasoning)182.829

Claude Opus 4.5 (Reasoning)83.923

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The Economics of Grok 4.1 Fast (Reasoning) vs Claude Opus 4.5 (Reasoning)

Power is only one part of the equation. This Grok 4.1 Fast (Reasoning) vs Claude Opus 4.5 (Reasoning) pricing analysis gives you a true sense of value.

Pricing Breakdown

Compare input and output pricing at a glance.

Real-World Cost Scenario

To process 1M input tokens and generate 250k output tokens, Grok 4.1 Fast (Reasoning) would cost $0.000, whereas Claude Opus 4.5 (Reasoning) would cost $0.011. This practical calculation is vital for any developer considering the Grok 4.1 Fast (Reasoning) vs Claude Opus 4.5 (Reasoning) choice.

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Which Model Wins the Grok 4.1 Fast (Reasoning) vs Claude Opus 4.5 (Reasoning) Battle for You?

Choose Grok 4.1 Fast (Reasoning) if...

Your top priority is raw performance and capability.

You need the most advanced reasoning capabilities available.

Your use case demands cutting-edge AI performance.

Choose Claude Opus 4.5 (Reasoning) if...

You are developing at scale where operational costs are critical.

You prioritize cost-effectiveness over maximum performance.

Your workload requires consistent, reliable performance.

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Your Questions about the Grok 4.1 Fast (Reasoning) vs Claude Opus 4.5 (Reasoning) Comparison

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Data source: https://artificialanalysis.ai/