ERNIE 4.0 vs Yi-Lightning
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 Yi-Lightning.
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.
Yi-Lightning
Yi-Lightning is 01.AI's (零一万物) fastest and most cost-efficient model, purpose-built for high-throughput production workloads. It delivers competitive performance against GPT-4o-mini and Claude Haiku at a fraction of the cost, with exceptional bilingual Chinese-English capabilities. Yi-Lightning excels at classification, entity extraction, summarization, and high-frequency API tasks where latency and cost-per-call are critical constraints.
Technical Specifications
| Specification | ERNIE 4.0 | Yi-Lightning |
|---|---|---|
| Provider | Baidu | 01.AI |
| Context Window | 128,000 tokens | 131,072 tokens |
| Agent Suitability | 87/100 | 82/100 |
| Time to First Token (TTFT) | 380 ms | 120 ms |
| Deployment Model | managed api | managed api |
| Production Stability | stable | stable |
| API Available | Yes | Yes |
| Released Date | 2025-08-30 | 2025-10-01 |
API Pricing Comparison
Input Price per Million Tokens
ERNIE 4.0
$1.20
Yi-Lightning
$0.15
Output Price per Million Tokens
ERNIE 4.0
$2.40
Yi-Lightning
$0.30
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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
Yi-Lightning Quirks & Gotchas
- ▸Best cost-efficiency for high-volume bilingual applications
- ▸Self-hostable via Ollama — excellent open-weight option for Asian-language pipelines