Model Comparison
Grok-4 Heavy vs Seed 2.0 ProWhich is better in 2026?
Both models are evenly matched across the benchmarks.
Verdict: Grok-4 Heavy vs Seed 2.0 Pro — which is better?
Grok-4 Heavy (by xAI) and Seed 2.0 Pro (by ByteDance) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.
Grok-4 Heavy outperforms in 1 benchmarks (AIME 2025), while Seed 2.0 Pro is better at 1 benchmark (GPQA). Both models are evenly matched across the benchmarks.
Choose Grok-4 Heavy if…
- you are already invested in the xAI ecosystem
Choose Seed 2.0 Pro if…
- you want predictable pricing at $0.50/M input and $3.00/M output
Performance Benchmarks
Comparative analysis across standard metrics
Grok-4 Heavy outperforms in 1 benchmarks (AIME 2025), while Seed 2.0 Pro is better at 1 benchmark (GPQA).
Both models are evenly matched across the benchmarks.
Arena Performance
Human preference votes
Context Window
Maximum input and output token capacity
Only Seed 2.0 Pro specifies input context (256,000 tokens). Only Seed 2.0 Pro specifies output context (65,536 tokens).
Input Capabilities
Supported data types and modalities
Both Grok-4 Heavy and Seed 2.0 Pro support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Grok-4 Heavy
Seed 2.0 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
Seed 2.0 Pro was released on 2026-02-14, while Grok-4 Heavy's release date is not specified.
We can confirm Seed 2.0 Pro's release timeline, but cannot make a direct age comparison without Grok-4 Heavy's release date.
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Feb 14, 2026
5 months ago
Knowledge Cutoff
When training data ends
Grok-4 Heavy has a knowledge cutoff of 2024-12-31, while Seed 2.0 Pro has a cutoff of 2024-01-01.
Grok-4 Heavy has more recent training data (up to 2024-12-31), making it potentially better informed about events through that date compared to Seed 2.0 Pro (2024-01-01).
Dec 2024
11 mo newerJan 2024
Outputs Comparison
Key Takeaways
Seed 2.0 Pro
View detailsByteDance
Detailed Comparison
Interactive Arena
Judge for yourself.
Run your own prompts against Grok-4 Heavy and Seed 2.0 Pro side-by-side, then vote on the output you prefer.
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FAQ
Common questions about Grok-4 Heavy vs Seed 2.0 Pro.