GPT-4o vs Grok-3
Grok-3 significantly outperforms across most benchmarks. GPT-4o is 1.4x cheaper per token.
OpenAI · xAI · Updated for 2026
Which is better?
GPT-4o outperforms in 0 benchmarks, while Grok-3 is better at 3 benchmarks (AIME 2024, GPQA, MMMU). Grok-3 significantly outperforms across most benchmarks.
On price, GPT-4o is roughly 1.4x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Based on current benchmark, pricing, and model metadata for 2026.
Choose GPT-4o
- cost matters — it's about 1.4x cheaper per token
Choose Grok-3
- you want the strongest raw capability — it leads on 3 of 3 shared benchmarks
- you want the most recent training data — it shipped Feb 2025
At a glance
The differences that matter most.
Performance Benchmarks
Comparative analysis across standard metrics
GPT-4o outperforms in 0 benchmarks, while Grok-3 is better at 3 benchmarks (AIME 2024, GPQA, MMMU).
Grok-3 significantly outperforms across most benchmarks.
Arena Performance
Playground indexes and blind preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, GPT-4o ($2.50/1M tokens) is 1.2x cheaper than Grok-3 ($3.00/1M tokens).
For output processing, GPT-4o ($10.00/1M tokens) is 1.5x cheaper than Grok-3 ($15.00/1M tokens).
In conclusion, Grok-3 is more expensive than GPT-4o.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Both models have the same input context window of 128,000 tokens. GPT-4o can generate longer responses up to 16,384 tokens, while Grok-3 is limited to 8,000 tokens.
Input Capabilities
Supported data types and modalities
Both GPT-4o and Grok-3 support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
GPT-4o
Grok-3
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
GPT-4o was released on 2024-08-06, while Grok-3 was released on 2025-02-17.
Grok-3 is 7 months newer than GPT-4o.
Aug 6, 2024
2.1 years ago
Feb 17, 2025
1.5 years ago
6mo newerKnowledge Cutoff
When training data ends
Grok-3 has a documented knowledge cutoff of 2024-11-17, while GPT-4o's cutoff date is not specified.
We can confirm Grok-3's training data extends to 2024-11-17, but cannot make a direct comparison without GPT-4o's cutoff date.
—
Nov 2024
Provider Availability
GPT-4o is available from Azure, OpenAI. Grok-3 is available from xAI.
GPT-4o
Grok-3
Outputs Comparison
Judge for yourself.
Run your own prompts against GPT-4o and Grok-3 side-by-side, then vote on the output you prefer.
FAQ
Common questions about GPT-4o vs Grok-3.