Which is cheaper, GPT-4o or Grok 3?

GPT-4o is cheaper for both input ($2.50/M tokens) and output ($10.00/M tokens), compared to Grok 3 at $3.00/$15.00 per million tokens.

Which is faster, GPT-4o or Grok 3?

GPT-4o is faster at 95 tokens/sec with a TTFT of 230ms, compared to Grok 3 at 80 tokens/sec and 300ms TTFT.

Which has a bigger context window, GPT-4o or Grok 3?

GPT-4o has a 128K token context window, which is equal to Grok 3's 128K context window.

Which is better for coding, GPT-4o or Grok 3?

Grok 3 has a higher coding ELO of 1290 compared to GPT-4o's 1265, making it the stronger choice for code generation and programming tasks.

GPT-4o vs Grok 3: Pricing, Benchmarks & Verdict (2026)

Name: GPT-4o vs Grok 3 — Pricing, Benchmarks & Speed Comparison 2026
Creator: LLMversus
License: https://creativecommons.org/licenses/by/4.0/

Pricing verified Apr 20, 2026By LLMversusUpdated June 14, 2026View methodology

⚡ Quick Answer

GPT-4o is significantly cheaper at $2.50/$10.00 per million tokens vs $3.00/$15.00. Grok 3 is stronger for coding with a coding ELO of 1290 vs 1265. Grok 3 ranks higher overall with an Arena ELO of 1300 vs 1260.

Updated: April 20, 2026 · ✓ Pricing verified

Side-by-Side Comparison

Feature	GPT-4o	Grok 3
Provider	OpenAI	xAI
Input Price / 1M tokens	$2.50	$3.00
Output Price / 1M tokens	$10.00	$15.00
Context Window	128K	200K
Max Output Tokens	16,384	8,192
Arena ELO	1,260	1,285
Coding ELO	1,265	1,280
TTFT (ms)	230	200
Tokens/sec	95	90
Multimodal	Yes	No
JSON Mode	Yes	Yes
Function Calling	Yes	Yes
Vision	Yes	No

When to Use GPT-4o

Choose GPT-4o when you need: fast response times, strong multimodal capabilities, code execution support. It excels at general-purpose, multimodal, function-calling tasks. It is also the more cost-effective option between the two.

Strengths:

Fast response times
Strong multimodal capabilities
Code execution support

Best for:

general-purposemultimodalfunction-calling

When to Use Grok 3

Choose Grok 3 when you need: strong benchmark performance, good reasoning capabilities, vision and multimodal support, fast for its capability tier. It excels at general-purpose, reasoning, coding tasks.

Strengths:

Latest xAI model
Strong reasoning
Large context

Best for:

general-purposecodingreasoning

GPT-4o vs Grok 3: Pricing, Benchmarks & Verdict (2026)

Side-by-Side Comparison

Frequently Asked Questions

Related Comparisons