Ernie 4.0vsClaude Opus 4
Baidu AI vs Anthropic — Side-by-side model comparison
Head-to-Head Comparison
| Metric | Ernie 4.0 | Claude Opus 4 |
|---|---|---|
| Provider | ||
| Arena Rank | — | #1 |
| Context Window | 128K | 200K |
| Input Pricing | Undisclosed/1M tokens | $5.00/1M tokens |
| Output Pricing | Undisclosed/1M tokens | $25.00/1M tokens |
| Parameters | Undisclosed | Undisclosed |
| Open Source | No | No |
| Best For | Chinese language, enterprise AI, search | Complex reasoning, coding, agentic tasks |
| Release Date | Apr 16, 2024 | May 22, 2025 |
Ernie 4.0
Ernie 4.0 is Baidu's most advanced foundation model, powering the Ernie Bot assistant that competes directly with ChatGPT in the Chinese market. It features strong Chinese language understanding, knowledge retrieval, and reasoning capabilities. Integrated deeply with Baidu's search engine and cloud platform, Ernie 4.0 serves as the backbone for enterprise AI solutions across China's technology ecosystem.
View Baidu AI profile →Claude Opus 4
Claude Opus 4 is Anthropic's most powerful AI model, holding the #1 position on the Chatbot Arena leaderboard. It represents a breakthrough in extended thinking and agentic capabilities, able to work autonomously on complex multi-step tasks for hours. With a 200K token context window, it excels at analyzing entire codebases, lengthy legal documents, and research papers in a single pass. The model demonstrates exceptional performance in coding (setting new benchmarks on SWE-bench), advanced reasoning, and nuanced writing tasks. Its agentic capabilities allow it to use tools, navigate computers, and execute multi-step workflows with minimal human oversight. Opus 4 is the preferred choice for enterprises requiring the highest quality output on mission-critical tasks where accuracy and depth matter more than speed or cost.
View Anthropic profile →Key Differences: Ernie 4.0 vs Claude Opus 4
Claude Opus 4 supports a larger context window (200K), allowing it to process longer documents in a single request.
When to use Ernie 4.0
- +Your use case involves chinese language, enterprise ai, search
When to use Claude Opus 4
- +You need to process long documents (200K context)
- +Your use case involves complex reasoning, coding, agentic tasks
The Verdict
Claude Opus 4 wins our head-to-head comparison with 4 out of 5 category wins. It's the stronger choice for complex reasoning, coding, agentic tasks, though Ernie 4.0 holds an edge in chinese language, enterprise ai, search.
Last compared: March 2026 · Data sourced from public benchmarks and official pricing pages