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  5. Gemini 1.5 ProvsGPT-4
Updated Feb 2024

Gemini 1.5 ProvsGPT-4

Gemini 1.5 Pro is cheaper than GPT-4 at $3.5/M vs $30/M input tokens.

Gemini 1.5 Pro and GPT-4 compared across 2 shared prompts
SpecGemini 1.5 ProGPT-4
Input price$3.5/M tokens$30/M tokens
Output price$10.5/M tokens$60/M tokens
Context window1.0M tokens8K tokens
Weights—Closed
Free API (OpenRouter)NoNo
ReleasedFeb 2024May 2023
HumanEval71.9%67.0%
Our Verdict
Gemini 1.5 Pro
Gemini 1.5 Pro
GPT-4
GPT-4

Not enough votes to call it. On the specs, nothing separates them.

Gemini 1.5 Pro costs 5.7x less per token.

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Gemini 1.5 Pro
Input
$3.50
8.6× cheaper
Output
$10.50
5.7× cheaper
GPT-4
Input
$30.00
Output
$60.00

Gemini 1.5 Pro is cheaper on both: 8.6× input, 5.7× output.

Where to run it

2 hosts

Gemini 1.5 Pro

No hosts listed on OpenRouter.

GPT-42 hosts
HostInOutContextUptime
Azure AI Foundry$30.00 in·$60.00 out·8k·100% upOpenAI$30.00 in·$60.00 out·8k·100% up

Per million tokens. Prices and uptime via OpenRouter, checked 23 Sep 2026.

Writing DNA

Style Comparison

Similarity
63%

Gemini 1.5 Pro uses 8.1x more headings

Gemini 1.5 Pro
GPT-4
61%Vocabulary59%
15wSentence Length18w
0.80Hedging1.10
3.7Bold0.8
3.3Lists2.5
0.00Emoji0.00
0.08Headings0.00
0.09Transitions0.45
Based on 8 + 15 text responses
Research

What we learned reading every model

FAQ

Common questions

Gemini 1.5 Pro is developed by Google AI while GPT-4 is developed by OpenAI. Gemini 1.5 Pro has a 1.0M token context window vs GPT-4's 8K. You can compare their actual outputs across 2 challenges on Rival to see how they differ in practice.

It depends on your use case. Gemini 1.5 Pro and GPT-4 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 2 challenges so you can judge which fits your needs best.

Gemini 1.5 Pro costs $3.5/M input tokens and GPT-4 costs $30/M input tokens. Gemini 1.5 Pro is $26.50/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

This page shows a side-by-side comparison of Gemini 1.5 Pro and GPT-4 across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.

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