ERNIE 4.0 vs o4 Mini Deep Research
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 ERNIE 4.0 and o4 Mini Deep Research.
ERNIE 4.0
ERNIE 4.0 (文心一言 4.0) is Baidu's most advanced large language model, representing the culmination of Baidu's decades of search and NLP expertise. Built on Baidu's proprietary knowledge-enhanced pre-training architecture, ERNIE 4.0 integrates deep understanding of Chinese language, culture, and domain-specific knowledge. It achieves GPT-4-class performance on comprehensive Chinese-language benchmarks spanning language understanding, reasoning, mathematics, and code generation. ERNIE 4.0 powers Baidu's Wenxin Yiyan consumer chatbot and is available via Baidu AI Cloud API for enterprise integrations.
o4 Mini Deep Research
o4-mini-deep-research is OpenAI's faster, more affordable deep research model—ideal for tackling complex, multi-step research tasks. Note: This model always uses the 'web_search' tool which adds additional cost.
Technical Specifications
| Specification | ERNIE 4.0 | o4 Mini Deep Research |
|---|---|---|
| Provider | Baidu | OpenAI |
| Context Window | 128,000 tokens | 200,000 tokens |
| Agent Suitability | 87/100 | N/A |
| Time to First Token (TTFT) | 380 ms | N/A |
| Deployment Model | managed api | managed api |
| Production Stability | stable | stable |
| API Available | Yes | Yes |
| Released Date | 2025-08-30 | 2025-10-10 |
API Pricing Comparison
Input Price per Million Tokens
ERNIE 4.0
$1.20
o4 Mini Deep Research
$2.00
Output Price per Million Tokens
ERNIE 4.0
$2.40
o4 Mini Deep Research
$8.00
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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.
ERNIE 4.0 Quirks & Gotchas
- ▸Superior Chinese-language understanding — best-in-class for China-market applications
- ▸API requires Baidu Cloud account with Chinese phone verification
o4 Mini Deep Research Quirks & Gotchas
No developer gotchas reported.