Claude 3 Opus vs GPT-4.5
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
GPT-4.5 by OpenAI wins on 13 of 16 benchmarks against Claude 3 Opus by Anthropic, which leads on 3. This head-to-head comparison covers coding, math, reasoning, speed, and pricing metrics from our benchmark data.
Category-by-Category Breakdown
General Intelligence: In general intelligence, GPT-4.5 scores 1310 on Chatbot Arena ELO compared to Claude 3 Opus's 1240, while GPT-4.5 scores 78.0% on MMLU-Pro compared to Claude 3 Opus's 68.0%, while GPT-4.5 scores 86.0% on IFEval compared to Claude 3 Opus's 82.0%, while GPT-4.5 scores 62.5% on SimpleQA compared to Claude 3 Opus's 29.0%.
Coding: In coding, GPT-4.5 scores 88.0% on HumanEval+ compared to Claude 3 Opus's 78.0%, while GPT-4.5 scores 38.0% on SWE-bench Verified compared to Claude 3 Opus's 22.0%, while GPT-4.5 scores 45.0% on LiveCodeBench compared to Claude 3 Opus's 32.0%.
Math: In math, GPT-4.5 scores 82.0% on MATH compared to Claude 3 Opus's 68.0%, while GPT-4.5 scores 94.0% on GSM8K compared to Claude 3 Opus's 88.0%.
Reasoning: In reasoning, GPT-4.5 scores 71.4% on GPQA Diamond compared to Claude 3 Opus's 59.4%, while GPT-4.5 scores 20.0% on ARC-AGI compared to Claude 3 Opus's 8.0%.
Context: In context, Claude 3 Opus scores 200K on Context Length compared to GPT-4.5's 128K.
Pricing Comparison
Claude 3 Opus costs $15.0/1M input tokens and $75.0/1M output tokens, while GPT-4.5 costs $75.0/1M input and $150.0/1M output. Claude 3 Opus is the more affordable option for API usage.
Speed Comparison
Claude 3 Opus generates output at 25 tok/s compared to GPT-4.5's 60 tok/s, and the time to first token is 800 ms for Claude 3 Opus versus 600 ms for GPT-4.5. GPT-4.5 delivers faster throughput.
Verdict
For developers prioritizing affordability, Claude 3 Opus has the edge. For those who value coding and general intelligence and math and speed, GPT-4.5 is the stronger choice.
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Claude 3 Opus vs GPT-4.5 — FAQ
Which is better, Claude 3 Opus or GPT-4.5?
GPT-4.5 wins on more benchmarks overall (13 vs 3). However, the best choice depends on your specific needs — each model excels in different areas.
How does Claude 3 Opus compare to GPT-4.5 for coding?
GPT-4.5 is better for coding, scoring 38.0% on SWE-bench Verified compared to 22.0%. SWE-bench tests real-world software engineering by resolving actual GitHub issues.
Is Claude 3 Opus cheaper than GPT-4.5?
Yes, Claude 3 Opus is cheaper. Claude 3 Opus costs $15.0/1M input and $75.0/1M output tokens. GPT-4.5 costs $75.0/1M input and $150.0/1M output tokens.
Which is faster, Claude 3 Opus or GPT-4.5?
GPT-4.5 is faster, generating output at 60 tok/s compared to 25 tok/s. Faster output speed means shorter wait times for API responses.
What benchmarks does the Claude 3 Opus vs GPT-4.5 comparison cover?
This comparison covers 16 benchmarks including Chatbot Arena ELO, MMLU-Pro, HumanEval+, IFEval, SimpleQA, MATH, GPQA Diamond, SWE-bench Verified, and more. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.