Claude Sonnet 4.5 vs DeepSeek R1 0528
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
Claude Sonnet 4.5 by Anthropic wins on 8 of 15 benchmarks against DeepSeek R1 0528 by DeepSeek, which leads on 6. This head-to-head comparison covers coding, math, reasoning, speed, and pricing metrics from the AI Value Index.
Category-by-Category Breakdown
General Intelligence: In general intelligence, Claude Sonnet 4.5 scores 1380 on Chatbot Arena ELO compared to DeepSeek R1 0528's 1375, while DeepSeek R1 0528 scores 84.0% on MMLU-Pro compared to Claude Sonnet 4.5's 83.0%, while both score 88.0% on IFEval.
Coding: In coding, Claude Sonnet 4.5 scores 90.0% on HumanEval+ compared to DeepSeek R1 0528's 88.0%, while Claude Sonnet 4.5 scores 77.2% on SWE-bench Verified compared to DeepSeek R1 0528's 55.0%, while Claude Sonnet 4.5 scores 62.0% on LiveCodeBench compared to DeepSeek R1 0528's 58.0%.
Math: In math, DeepSeek R1 0528 scores 96.0% on MATH compared to Claude Sonnet 4.5's 87.0%, while DeepSeek R1 0528 scores 97.5% on GSM8K compared to Claude Sonnet 4.5's 95.5%.
Reasoning: In reasoning, Claude Sonnet 4.5 scores 83.4% on GPQA Diamond compared to DeepSeek R1 0528's 81.0%, while Claude Sonnet 4.5 scores 45.0% on ARC-AGI compared to DeepSeek R1 0528's 15.0%.
Context: In context, Claude Sonnet 4.5 scores 200K on Context Length compared to DeepSeek R1 0528's 131K.
Pricing Comparison
Claude Sonnet 4.5 costs $3.0/1M input tokens and $15.0/1M output tokens, while DeepSeek R1 0528 costs $0.55/1M input and $2.2/1M output. DeepSeek R1 0528 is the more affordable option for API usage.
Speed Comparison
Claude Sonnet 4.5 generates output at 67 tok/s compared to DeepSeek R1 0528's 40 tok/s, and the time to first token is 1170 ms for Claude Sonnet 4.5 versus 900 ms for DeepSeek R1 0528. Claude Sonnet 4.5 delivers faster throughput.
Verdict
For developers prioritizing coding and general intelligence and speed, Claude Sonnet 4.5 has the edge. For those who value math and affordability, DeepSeek R1 0528 is the stronger choice.
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Claude Sonnet 4.5 vs DeepSeek R1 0528 — FAQ
Which is better, Claude Sonnet 4.5 or DeepSeek R1 0528?
Claude Sonnet 4.5 wins on more benchmarks overall (8 vs 6). However, the best choice depends on your specific needs — each model excels in different areas.
How does Claude Sonnet 4.5 compare to DeepSeek R1 0528 for coding?
Claude Sonnet 4.5 is better for coding, scoring 77.2% on SWE-bench Verified compared to 55.0%. SWE-bench tests real-world software engineering by resolving actual GitHub issues.
Is Claude Sonnet 4.5 cheaper than DeepSeek R1 0528?
Yes, DeepSeek R1 0528 is cheaper. Claude Sonnet 4.5 costs $3.0/1M input and $15.0/1M output tokens. DeepSeek R1 0528 costs $0.55/1M input and $2.2/1M output tokens.
Which is faster, Claude Sonnet 4.5 or DeepSeek R1 0528?
Claude Sonnet 4.5 is faster, generating output at 67 tok/s compared to 40 tok/s. Faster output speed means shorter wait times for API responses.
What benchmarks does the Claude Sonnet 4.5 vs DeepSeek R1 0528 comparison cover?
This comparison covers 15 benchmarks including Chatbot Arena ELO, MMLU-Pro, HumanEval+, IFEval, MATH, SWE-bench Verified, GPQA Diamond, Output Speed, and more. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.