Compare/GPT-5 (low) vs Gemini 2.5 Pro

GPT-5 (low)vsGemini 2.5 Pro

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

OpenAI

GPT-5 (low)

Input
$1.25/M
Output
$10/M
Speed
66 tok/s
TTFT
13.15s
Google

Gemini 2.5 Pro

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

Winner by Category

Cheaper
Tie
Faster (tok/s)
Gemini 2.5 Pro
Lower Latency
GPT-5 (low)
Benchmarks (3-8)
Gemini 2.5 Pro

Pricing Comparison

MetricGPT-5 (low)Gemini 2.5 Pro
Input ($/M tokens)$1.25$1.25
Output ($/M tokens)$10$10
Cost for 1M input + 100K output tokens:
GPT-5 (low)$2.25
Gemini 2.5 Pro$2.25

Speed Comparison

Output Speed (tokens/s) — higher is better
GPT-5 (low)
66 tok/s
Gemini 2.5 Pro
131 tok/s
Time to First Token (seconds) — lower is better
GPT-5 (low)
13.15s
Gemini 2.5 Pro
23.22s

Benchmark Comparison

Data from Artificial Analysis API — 12 benchmarks

Intelligence Index
39.234.6
Coding Index
30.731.9
Math Index
83.087.7
GPQA Diamond
80.8%84.4%
MMLU-Pro
86.0%86.2%
LiveCodeBench
76.3%80.1%
AIME 2025
83.0%87.7%
MATH-500
98.7%96.7%
Humanity's Last Exam
18.4%21.1%
SciCode
39.1%42.8%
IFBench
66.6%48.7%
TerminalBench
26.5%26.5%
GPT-5 (low)3 wins
8 winsGemini 2.5 Pro

Frequently Asked Questions

Which is cheaper, GPT-5 (low) or Gemini 2.5 Pro?

Both models have similar pricing. Check the detailed breakdown above for input vs output token costs.

Which model performs better on benchmarks?

Gemini 2.5 Pro wins 8 out of 12 benchmarks compared to 3 for GPT-5 (low). 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 66 tok/s. GPT-5 (low) also has lower time-to-first-token (13.15s vs 23.22s).

When should I use GPT-5 (low) vs Gemini 2.5 Pro?

Choose based on your priorities: both are similarly priced, 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.