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Claude Sonnet 4.6 vs ERNIE 4.0

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 Claude Sonnet 4.6 and ERNIE 4.0.

Anthropic

Claude Sonnet 4.6

Sonnet 4.6 is Anthropic's most capable Sonnet-class model yet, with frontier performance across coding, agents, and professional work. It excels at iterative development, complex codebase navigation, end-to-end project management with...

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Baidu

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.

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Technical Specifications

SpecificationClaude Sonnet 4.6ERNIE 4.0
ProviderAnthropicBaidu
Context Window1,000,000 tokens128,000 tokens
Agent Suitability94/10087/100
Time to First Token (TTFT)350 ms380 ms
Deployment Modelmanaged apimanaged api
Production Stabilitystablestable
API AvailableYesYes
Released Date2026-02-172025-08-30

API Pricing Comparison

Input Price per Million Tokens

Claude Sonnet 4.6

$3.00

ERNIE 4.0

$1.20

Output Price per Million Tokens

Claude Sonnet 4.6

$15.00

ERNIE 4.0

$2.40

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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.

MMLUGeneral knowledge & multi-task understanding
9040.0%vsN/A
Claude Sonnet 4.6
ERNIE 4.0
HumanEvalPython coding & logic synthesis
9370.0%vsN/A
Claude Sonnet 4.6
ERNIE 4.0
MATHComplex mathematical problem solving
8230.0%vsN/A
Claude Sonnet 4.6
ERNIE 4.0
GPQAGraduate-level expert reasoning
6500.0%vsN/A
Claude Sonnet 4.6
ERNIE 4.0
HellaSwagCommonsense reasoning and inference
9600.0%vsN/A
Claude Sonnet 4.6
ERNIE 4.0
MT-BenchMulti-turn conversation flow quality
940.0%vsN/A
Claude Sonnet 4.6
ERNIE 4.0

Claude Sonnet 4.6 Quirks & Gotchas

  • β–ΈBest balance of speed and capability β€” default for most Claude integrations
  • β–ΈComputer-use (beta) feature enables autonomous UI interaction

ERNIE 4.0 Quirks & Gotchas

  • β–ΈSuperior Chinese-language understanding β€” best-in-class for China-market applications
  • β–ΈAPI requires Baidu Cloud account with Chinese phone verification