GPT-4o vs Grok 4.6
Comparing GPT-4o and Grok 4.6 across benchmarks, pricing, and capabilities.
OpenAI · xAI · Updated for 2026
Which is better?
GPT-4o and Grok 4.6 trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.
On price, Grok 4.6 is roughly 1.5x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Grok 4.6 also accepts a larger context window (500,000 input tokens), making it the stronger choice for long documents and large codebases.
Based on current benchmark, pricing, and model metadata for 2026.
Choose GPT-4o
- you want predictable pricing at $2.50/M input and $10.00/M output
Choose Grok 4.6
- cost matters — it's about 1.5x cheaper per token
- you process long inputs — it offers a 500,000 token context window
- you want the most recent training data — it shipped Aug 2026
At a glance
The differences that matter most.
Performance Benchmarks
Comparative analysis across standard metrics
GPT-4o and Grok 4.6don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.
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 1.3x more expensive than Grok 4.6 ($2.00/1M tokens).
For output processing, GPT-4o ($10.00/1M tokens) is 1.7x more expensive than Grok 4.6 ($6.00/1M tokens).
In conclusion, GPT-4o is more expensive than Grok 4.6.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Grok 4.6 accepts 500,000 input tokens compared to GPT-4o's 128,000 tokens. Only GPT-4o specifies output context (16,384 tokens).
Input Capabilities
Supported data types and modalities
Both GPT-4o and Grok 4.6 support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
GPT-4o
Grok 4.6
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 4.6 was released on 2026-08-12.
Grok 4.6 is 25 months newer than GPT-4o.
Aug 6, 2024
2.0 years ago
Aug 12, 2026
1 weeks ago
2.0yr newerKnowledge Cutoff
When training data ends
Grok 4.6 has a documented knowledge cutoff of 2026-02-01, while GPT-4o's cutoff date is not specified.
We can confirm Grok 4.6's training data extends to 2026-02-01, but cannot make a direct comparison without GPT-4o's cutoff date.
—
Feb 2026
Provider Availability
GPT-4o is available from Azure, OpenAI. Grok 4.6 is available from xAI.
GPT-4o
Grok 4.6
Outputs Comparison
Judge for yourself.
Run your own prompts against GPT-4o and Grok 4.6 side-by-side, then vote on the output you prefer.
FAQ
Common questions about GPT-4o vs Grok 4.6.