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  5. GPT-4.5vsGrok 4.7
Updated Sep 2026

GPT-4.5vsGrok 4.7

Grok 4.7 is cheaper than GPT-4.5 at $1.6/M vs $75/M input tokens.

GPT-4.5 and Grok 4.7 compared across 1 shared prompts
SpecGPT-4.5Grok 4.7
Input price$75/M tokens$1.6/M tokens
Output price$150/M tokens$4.8/M tokens
Context window128K tokens500K tokens
Weights—Closed
Free API (OpenRouter)NoNo
ReleasedFeb 2025Sep 2026
Our Verdict
GPT-4.5
GPT-4.5
Grok 4.7
Grok 4.7

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

Grok 4.7 costs 31x less per token.

Too close to call
API pricing

Cost per 1M tokens

GPT-4.5
Input
$75.00
Output
$150.00
Grok 4.7
Input
$1.60
47× cheaper
Output
$4.80
31× cheaper

Grok 4.7 is cheaper on both: 47× input, 31× output.

Where to run it

1 host

GPT-4.5

No hosts listed on OpenRouter.

Grok 4.71 host
HostInOutContextUptime
xAI$1.60 in·$4.80 out·500k·98.9% up

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

Research

What we learned reading every model

FAQ

Common questions

GPT-4.5 is developed by OpenAI while Grok 4.7 is developed by xAI. GPT-4.5 has a 128K token context window vs Grok 4.7's 500K. You can compare their actual outputs across 1 challenges on Rival to see how they differ in practice.

It depends on your use case. GPT-4.5 and Grok 4.7 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 1 challenges so you can judge which fits your needs best.

GPT-4.5 costs $75/M input tokens and Grok 4.7 costs $1.6/M input tokens. Grok 4.7 is $73.40/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 GPT-4.5 and Grok 4.7 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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Model pages

GPT-4.5 logo
GPT-4.526 outputs, specs and price
Grok 4.7 logo
Grok 4.710 outputs, specs and price
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