Grok 4.1 Fast (Reasoning) vs LFM2 8B A1B: The Ultimate Performance & Pricing Comparison

Deep dive into reasoning, benchmarks, and latency insights.

The Final Verdict in the Grok 4.1 Fast (Reasoning) vs LFM2 8B A1B Showdown

After a comprehensive analysis, Grok 4.1 Fast (Reasoning) emerges as the superior choice for users prioritizing raw intelligence and reasoning. However, LFM2 8B A1B remains a highly competitive option, especially for scenarios demanding faster response times and cost-efficiency. This detailed Grok 4.1 Fast (Reasoning) vs LFM2 8B A1B 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

LFM2 8B A1B

Other

Reasoning: 3
Coding: 1
Multimodal: 1
Long Context: 1
Blended Price / 1M tokens: $0.015
P95 Latency: 1000ms
Tokens per second: —

Overall Capabilities

The capability radar provides a holistic view of the Grok 4.1 Fast (Reasoning) vs LFM2 8B A1B matchup. This chart illustrates each model's strengths and weaknesses at a glance, forming a cornerstone of our Grok 4.1 Fast (Reasoning) vs LFM2 8B A1B analysis.

This radar chart visually maps the core capabilities (reasoning, coding, math proxy, multimodal, long context) of `Grok 4.1 Fast (Reasoning)` vs `LFM2 8B A1B`.

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 LFM2 8B A1B debate, Grok 4.1 Fast (Reasoning) scores 90 against LFM2 8B A1B's 30. This data-driven approach is essential for any serious Grok 4.1 Fast (Reasoning) vs LFM2 8B A1B 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 LFM2 8B A1B 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

LFM2 8B A1B300ms

Tokens per Second

Grok 4.1 Fast (Reasoning)182.829

LFM2 8B A1B37

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The Economics of Grok 4.1 Fast (Reasoning) vs LFM2 8B A1B

Power is only one part of the equation. This Grok 4.1 Fast (Reasoning) vs LFM2 8B A1B 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 LFM2 8B A1B would cost $0.018. This practical calculation is vital for any developer considering the Grok 4.1 Fast (Reasoning) vs LFM2 8B A1B choice.

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Which Model Wins the Grok 4.1 Fast (Reasoning) vs LFM2 8B A1B Battle for You?

Choose Grok 4.1 Fast (Reasoning) if...

Your top priority is raw performance and capability.

You are working in a technical or scientific field requiring the highest accuracy.

You need the most advanced reasoning capabilities available.

Choose LFM2 8B A1B 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 LFM2 8B A1B Comparison

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Data source: https://artificialanalysis.ai/