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GPT-4o and Claude 3.5 Sonnet: A Performance Comparison Across Key Benchmarks

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October 22, 2025

1. Benchmark Methodology

We evaluated GPT-4o and Claude 3.5 Sonnet across six key dimensions: reasoning accuracy, code generation quality, instruction following, latency, cost efficiency, and multi-turn conversation coherence. All tests were conducted through the PP API unified interface to ensure consistent evaluation conditions.

Benchmark methodology overview

2. Results and Analysis

Both models demonstrated exceptional performance across all benchmarks, with each showing strengths in different areas. GPT-4o excelled in multi-modal tasks and creative generation, while Claude 3.5 Sonnet showed superior performance in analytical reasoning and code generation tasks.

Cost-Performance Ratio

When factoring in cost per token, the performance gap narrows significantly. Through PP API's intelligent routing, customers can automatically select the most cost-effective model for each task type, achieving optimal cost-performance ratios without manual model selection.

Performance comparison radar chart
Cost-performance analysis

3. Recommendations

For most production use cases, we recommend leveraging PP API's auto-routing feature to dynamically select the best model based on task characteristics. This approach consistently outperforms single-model strategies in both quality and cost metrics.