Compare/Grok 3 vs GPT-4o (May '24)

Grok 3vsGPT-4o (May '24)

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

SpaceXAI

Grok 3

Input
$4/M
Output
$20/M
Speed
TTFT
OpenAI

GPT-4o (May '24)

Input
$5/M
Output
$15/M
Speed
100 tok/s
TTFT
0.62s

Winner by Category

Cheaper
GPT-4o (May '24)
Faster (tok/s)
GPT-4o (May '24)
Lower Latency
Grok 3
Benchmarks (11-1)
Grok 3

Pricing Comparison

MetricGrok 3GPT-4o (May '24)
Input ($/M tokens)$4$5
Output ($/M tokens)$20$15
Cost for 1M input + 100K output tokens:
Grok 3$6.00
GPT-4o (May '24)$6.50

Speed Comparison

Output Speed (tokens/s) — higher is better
Grok 3
GPT-4o (May '24)
100 tok/s
Time to First Token (seconds) — lower is better
Grok 3
GPT-4o (May '24)
0.62s

Benchmark Comparison

Data from Artificial Analysis API — 12 benchmarks

Intelligence Index
18.48.6
Coding Index
24.2
Math Index
58.0
GPQA Diamond
69.3%52.6%
MMLU-Pro
79.9%74.0%
LiveCodeBench
42.5%33.4%
AIME 2025
58.0%
MATH-500
87.0%79.1%
Humanity's Last Exam
5.1%2.8%
SciCode
36.8%30.9%
IFBench
46.9%
TerminalBench
11.4%
Grok 311 wins
1 winsGPT-4o (May '24)

Frequently Asked Questions

Which is cheaper, Grok 3 or GPT-4o (May '24)?

GPT-4o (May '24) is cheaper overall. Its blended price (3:1 input/output ratio) is $7.50/M tokens vs $8.00/M for Grok 3.

Which model performs better on benchmarks?

Grok 3 wins 11 out of 12 benchmarks compared to 1 for GPT-4o (May '24). See the detailed benchmark chart above for per-category results.

Which is faster for real-time applications?

GPT-4o (May '24) generates tokens faster at 100 tok/s vs 0 tok/s. Grok 3 also has lower time-to-first-token (0.00s vs 0.62s).

When should I use Grok 3 vs GPT-4o (May '24)?

Choose based on your priorities: GPT-4o (May '24) for lower cost, Grok 3 for stronger benchmark performance, and GPT-4o (May '24) for faster generation. For latency-sensitive apps, check the TTFT comparison above.