Compare/Gemini 2.5 Pro vs GPT-4o (Aug '24)

Gemini 2.5 ProvsGPT-4o (Aug '24)

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

Google

Gemini 2.5 Pro

Input
$1.25/M
Output
$10/M
Speed
131 tok/s
TTFT
23.22s
OpenAI

GPT-4o (Aug '24)

Input
$2.5/M
Output
$10/M
Speed
84 tok/s
TTFT
0.68s

Winner by Category

Cheaper
Gemini 2.5 Pro
Faster (tok/s)
Gemini 2.5 Pro
Lower Latency
GPT-4o (Aug '24)
Benchmarks (12-0)
Gemini 2.5 Pro

Pricing Comparison

MetricGemini 2.5 ProGPT-4o (Aug '24)
Input ($/M tokens)$1.25$2.5
Output ($/M tokens)$10$10
Cost for 1M input + 100K output tokens:
Gemini 2.5 Pro$2.25
GPT-4o (Aug '24)$3.50

Speed Comparison

Output Speed (tokens/s) — higher is better
Gemini 2.5 Pro
131 tok/s
GPT-4o (Aug '24)
84 tok/s
Time to First Token (seconds) — lower is better
Gemini 2.5 Pro
23.22s
GPT-4o (Aug '24)
0.68s

Benchmark Comparison

Data from Artificial Analysis API — 12 benchmarks

Intelligence Index
34.618.6
Coding Index
31.916.6
Math Index
87.7
GPQA Diamond
84.4%52.1%
MMLU-Pro
86.2%
LiveCodeBench
80.1%31.7%
AIME 2025
87.7%
MATH-500
96.7%79.5%
Humanity's Last Exam
21.1%2.9%
SciCode
42.8%33.1%
IFBench
48.7%36.0%
TerminalBench
26.5%8.3%
Gemini 2.5 Pro12 wins
0 winsGPT-4o (Aug '24)

Frequently Asked Questions

Which is cheaper, Gemini 2.5 Pro or GPT-4o (Aug '24)?

Gemini 2.5 Pro is cheaper overall. Its blended price (3:1 input/output ratio) is $3.44/M tokens vs $4.38/M for GPT-4o (Aug '24).

Which model performs better on benchmarks?

Gemini 2.5 Pro wins 12 out of 12 benchmarks compared to 0 for GPT-4o (Aug '24). See the detailed benchmark chart above for per-category results.

Which is faster for real-time applications?

Gemini 2.5 Pro generates tokens faster at 131 tok/s vs 84 tok/s. However, GPT-4o (Aug '24) has lower time-to-first-token (0.68s vs 23.22s).

When should I use Gemini 2.5 Pro vs GPT-4o (Aug '24)?

Choose based on your priorities: Gemini 2.5 Pro for lower cost, Gemini 2.5 Pro for stronger benchmark performance, and Gemini 2.5 Pro for faster generation. For latency-sensitive apps, check the TTFT comparison above.