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Claude Opus 4.8 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 Opus 4.8 and ERNIE 4.0.

Anthropic

Claude Opus 4.8

Claude Opus 4.8 is Anthropic's most capable generally available model in the Opus family. It supports text, image, and file inputs with text output, with reasoning support and a 1M-token...

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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 Opus 4.8ERNIE 4.0
ProviderAnthropicBaidu
Context Window1,000,000 tokens128,000 tokens
Agent Suitability97/10087/100
Time to First Token (TTFT)520 ms380 ms
Deployment Modelmanaged apimanaged api
Production Stabilitybetastable
API AvailableYesYes
Released Date2026-05-272025-08-30

API Pricing Comparison

Input Price per Million Tokens

Claude Opus 4.8

$5.00

ERNIE 4.0

$1.20

Output Price per Million Tokens

Claude Opus 4.8

$25.00

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
9540.0%vsN/A
Claude Opus 4.8
ERNIE 4.0
HumanEvalPython coding & logic synthesis
9720.0%vsN/A
Claude Opus 4.8
ERNIE 4.0
MATHComplex mathematical problem solving
9410.0%vsN/A
Claude Opus 4.8
ERNIE 4.0
GPQAGraduate-level expert reasoning
8650.0%vsN/A
Claude Opus 4.8
ERNIE 4.0
HellaSwagCommonsense reasoning and inference
9920.0%vsN/A
Claude Opus 4.8
ERNIE 4.0
MT-BenchMulti-turn conversation flow quality
980.0%vsN/A
Claude Opus 4.8
ERNIE 4.0

Claude Opus 4.8 Quirks & Gotchas

  • β–ΈBest-in-class for autonomous code repair and multi-agent orchestration
  • β–ΈPreview model β€” API may introduce breaking changes without notice

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