Claude 4.5 Sonnet (Reasoning) vs Kimi K2 0905: The Ultimate Performance & Pricing Comparison

Deep dive into reasoning, benchmarks, and latency insights.

The Final Verdict in the Claude 4.5 Sonnet (Reasoning) vs Kimi K2 0905 Showdown

After a comprehensive analysis, Claude 4.5 Sonnet (Reasoning) emerges as the superior choice for users prioritizing raw intelligence and reasoning. However, Kimi K2 0905 remains a highly competitive option, especially for scenarios demanding faster response times and cost-efficiency. This detailed Claude 4.5 Sonnet (Reasoning) vs Kimi K2 0905 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.

Claude 4.5 Sonnet (Reasoning)

Anthropic

Reasoning: 9
Coding: 4
Multimodal: 4
Long Context: 5
Blended Price / 1M tokens: $0.006
P95 Latency: 1000ms
Tokens per second: 69.032tokens/sec

Kimi K2 0905

Other

Reasoning: 6
Coding: 3
Multimodal: 3
Long Context: 4
Blended Price / 1M tokens: $0.001
P95 Latency: 1000ms
Tokens per second: 50.939tokens/sec

Overall Capabilities

The capability radar provides a holistic view of the Claude 4.5 Sonnet (Reasoning) vs Kimi K2 0905 matchup. This chart illustrates each model's strengths and weaknesses at a glance, forming a cornerstone of our Claude 4.5 Sonnet (Reasoning) vs Kimi K2 0905 analysis.

This radar chart visually maps the core capabilities (reasoning, coding, math proxy, multimodal, long context) of `Claude 4.5 Sonnet (Reasoning)` vs `Kimi K2 0905`.

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 Claude 4.5 Sonnet (Reasoning) vs Kimi K2 0905 debate, Claude 4.5 Sonnet (Reasoning) scores 90 against Kimi K2 0905's 60. This data-driven approach is essential for any serious Claude 4.5 Sonnet (Reasoning) vs Kimi K2 0905 comparison.

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

Speed & Latency

Speed is a crucial factor in the Claude 4.5 Sonnet (Reasoning) vs Kimi K2 0905 decision for interactive applications. The metrics below highlight the trade-offs you should weigh before shipping to production.

Time to First Token

Claude 4.5 Sonnet (Reasoning)300ms

Kimi K2 0905300ms

Tokens per Second

Claude 4.5 Sonnet (Reasoning)69.032

Kimi K2 090550.939

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The Economics of Claude 4.5 Sonnet (Reasoning) vs Kimi K2 0905

Power is only one part of the equation. This Claude 4.5 Sonnet (Reasoning) vs Kimi K2 0905 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, Claude 4.5 Sonnet (Reasoning) would cost $0.007, whereas Kimi K2 0905 would cost $0.002. This practical calculation is vital for any developer considering the Claude 4.5 Sonnet (Reasoning) vs Kimi K2 0905 choice.

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Which Model Wins the Claude 4.5 Sonnet (Reasoning) vs Kimi K2 0905 Battle for You?

Choose Claude 4.5 Sonnet (Reasoning) if...

Your top priority is raw performance and capability.

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

Cost is a secondary concern to power in your Claude 4.5 Sonnet (Reasoning) vs Kimi K2 0905 decision.

Choose Kimi K2 0905 if...

You need a highly responsive model for user-facing applications.

Your budget is a primary consideration in the Claude 4.5 Sonnet (Reasoning) vs Kimi K2 0905 choice.

You are developing at scale where operational costs are critical.

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Your Questions about the Claude 4.5 Sonnet (Reasoning) vs Kimi K2 0905 Comparison

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Data source: https://artificialanalysis.ai/