Doubao Pro vs GPT-5.1-Codex-Max
How do these models stack up? Below is an expert side-by-side comparison of specifications, context window capacity, live pricing per million tokens, and standardized benchmark scores for Doubao Pro and GPT-5.1-Codex-Max.
Doubao Pro
Doubao Pro (θ±ε Pro) is ByteDance's flagship large language model, powering the Doubao AI assistant used by over 100 million monthly active users in China. Built by ByteDance's Seed team, Doubao Pro achieves top-tier results on Chinese-language benchmarks, excelling at long-context understanding, multimodal reasoning, and creative writing. Its architecture is optimized for the massive scale of ByteDance's inference infrastructure, enabling cost-efficient deployment across Douyin, TikTok, and enterprise API customers via Volcano Engine.
GPT-5.1-Codex-Max
GPT-5.1-Codex-Max is OpenAIβs latest agentic coding model, designed for long-running, high-context software development tasks. It is based on an updated version of the 5.1 reasoning stack and trained on agentic...
Technical Specifications
| Specification | Doubao Pro | GPT-5.1-Codex-Max |
|---|---|---|
| Provider | ByteDance | OpenAI |
| Context Window | 256,000 tokens | 400,000 tokens |
| Agent Suitability | 86/100 | N/A |
| Time to First Token (TTFT) | 300 ms | N/A |
| Deployment Model | managed api | managed api |
| Production Stability | stable | stable |
| API Available | Yes | Yes |
| Released Date | 2026-01-15 | 2025-12-04 |
API Pricing Comparison
Input Price per Million Tokens
Doubao Pro
$0.80
GPT-5.1-Codex-Max
$1.25
Output Price per Million Tokens
Doubao Pro
$1.60
GPT-5.1-Codex-Max
$10.00
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Benchmark Performance Metrics
Scores show the raw performance percentages verified across key evaluation suites. Higher bars indicate superior accuracy and capability in that domain.
Doubao Pro Quirks & Gotchas
- βΈMassive user base β one of the most deployed Chinese models in production
- βΈAPI available through Volcano Engine β requires Chinese enterprise registration
GPT-5.1-Codex-Max Quirks & Gotchas
No developer gotchas reported.