GPT-5.1 Codex High vs Seed 2.0 Pro Comparison
Comparing GPT-5.1 Codex High and Seed 2.0 Pro across benchmarks, pricing, and capabilities.
Performance Benchmarks
Comparative analysis across standard metrics
GPT-5.1 Codex High outperforms in 0 benchmarks, while Seed 2.0 Pro is better at 1 benchmark (AIME 2025).
Seed 2.0 Pro significantly outperforms across most benchmarks.
Arena Performance
Human preference votes
Pricing Analysis
Price comparison per million tokens
Cost data unavailable.
Context Window
Maximum input and output token capacity
Only GPT-5.1 Codex High specifies input context (400,000 tokens). Only GPT-5.1 Codex High specifies output context (128,000 tokens).
Input Capabilities
Supported data types and modalities
Both GPT-5.1 Codex High and Seed 2.0 Pro support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
GPT-5.1 Codex High
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
GPT-5.1 Codex High was released on 2025-11-12, while Seed 2.0 Pro was released on 2026-02-14.
Seed 2.0 Pro is 3 months newer than GPT-5.1 Codex High.
Nov 12, 2025
4 months ago
Feb 14, 2026
4 weeks ago
3mo newerKnowledge Cutoff
When training data ends
Seed 2.0 Pro has a documented knowledge cutoff of 2024-01-01, while GPT-5.1 Codex High's cutoff date is not specified.
We can confirm Seed 2.0 Pro's training data extends to 2024-01-01, but cannot make a direct comparison without GPT-5.1 Codex High's cutoff date.
—
Jan 2024
Outputs Comparison
Key Takeaways
Seed 2.0 Pro
View detailsByteDance
Detailed Comparison
| Feature | | |
|---|