Grok 4.6 vs o3-pro
Comparing Grok 4.6 and o3-pro across benchmarks, pricing, and capabilities.
xAI · OpenAI · Updated for 2026
Which is better?
Grok 4.6 and o3-pro trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.
On price, Grok 4.6 is roughly 11.7x 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 Grok 4.6
- cost matters — it's about 11.7x 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
Choose o3-pro
- you want predictable pricing at $20.00/M input and $80.00/M output
At a glance
The differences that matter most.
Performance Benchmarks
Comparative analysis across standard metrics
Grok 4.6 and o3-prodon'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, Grok 4.6 ($2.00/1M tokens) is 10.0x cheaper than o3-pro ($20.00/1M tokens).
For output processing, Grok 4.6 ($6.00/1M tokens) is 13.3x cheaper than o3-pro ($80.00/1M tokens).
In conclusion, o3-pro 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 o3-pro's 200,000 tokens. Only o3-pro specifies output context (100,000 tokens).
Input Capabilities
Supported data types and modalities
Both Grok 4.6 and o3-pro support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Grok 4.6
o3-pro
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
Grok 4.6 was released on 2026-08-12, while o3-pro was released on 2025-06-10.
Grok 4.6 is 14 months newer than o3-pro.
Aug 12, 2026
1 weeks ago
1.2yr newerJun 10, 2025
1.2 years ago
Knowledge Cutoff
When training data ends
Grok 4.6 has a knowledge cutoff of 2026-02-01, while o3-pro has a cutoff of 2024-05-31.
Grok 4.6 has more recent training data (up to 2026-02-01), making it potentially better informed about events through that date compared to o3-pro (2024-05-31).
Feb 2026
1.8 yr newerMay 2024
Provider Availability
Grok 4.6 is available from xAI. o3-pro is available from OpenAI.
Grok 4.6
o3-pro
Outputs Comparison
Judge for yourself.
Run your own prompts against Grok 4.6 and o3-pro side-by-side, then vote on the output you prefer.
FAQ
Common questions about Grok 4.6 vs o3-pro.