Compare/o3-pro vs Claude 3 Opus

o3-provsClaude 3 Opus

Side-by-side comparison of pricing, 12 benchmarks, and generation speed.

OpenAI

o3-pro

Input
$20/M
Output
$80/M
Speed
21 tok/s
TTFT
89.23s
Anthropic

Claude 3 Opus

Input
$15/M
Output
$75/M
Speed
TTFT

Winner by Category

Cheaper
Claude 3 Opus
Faster (tok/s)
o3-pro
Lower Latency
Claude 3 Opus
Benchmarks (2-6)
Claude 3 Opus

Pricing Comparison

Metrico3-proClaude 3 Opus
Input ($/M tokens)$20$15
Output ($/M tokens)$80$75
Cost for 1M input + 100K output tokens:
o3-pro$28.00
Claude 3 Opus$22.50

Speed Comparison

Output Speed (tokens/s) — higher is better
o3-pro
21 tok/s
Claude 3 Opus
Time to First Token (seconds) — lower is better
o3-pro
89.23s
Claude 3 Opus

Benchmark Comparison

Data from Artificial Analysis API — 12 benchmarks

Intelligence Index
40.718.0
Coding Index
19.5
Math Index
GPQA Diamond
84.5%48.9%
MMLU-Pro
69.6%
LiveCodeBench
27.9%
AIME 2025
MATH-500
64.1%
Humanity's Last Exam
3.1%
SciCode
23.3%
IFBench
TerminalBench
o3-pro2 wins
6 winsClaude 3 Opus

Frequently Asked Questions

Which is cheaper, o3-pro or Claude 3 Opus?

Claude 3 Opus is cheaper overall. Its blended price (3:1 input/output ratio) is $30.00/M tokens vs $35.00/M for o3-pro.

Which model performs better on benchmarks?

Claude 3 Opus wins 6 out of 12 benchmarks compared to 2 for o3-pro. See the detailed benchmark chart above for per-category results.

Which is faster for real-time applications?

o3-pro generates tokens faster at 21 tok/s vs 0 tok/s. However, Claude 3 Opus has lower time-to-first-token (0.00s vs 89.23s).

When should I use o3-pro vs Claude 3 Opus?

Choose based on your priorities: Claude 3 Opus for lower cost, Claude 3 Opus for stronger benchmark performance, and o3-pro for faster generation. For latency-sensitive apps, check the TTFT comparison above.