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ERNIE 4.5 21B Thinking vs Claude Sonnet 5

At a glance

Compact ERNIE 4.5 model with always-on thinking mode.

Anthropic's fifth-generation Sonnet — near-Opus intelligence at Sonnet speed and price.

801M ctx$2.00/$10.00 per M#26/92
Agent Demos
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AI Output
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No captured outputs for these models yet.

Benchmarks
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This model hasn't been benchmarked yet.

Reasoning
CI 72.7-84.7
CodingInsufficient data
AgenticInsufficient data
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-07-10
Capability
CapabilityECI80.1
Reasoning & Knowledge
Graduate Science90.5%Factual Recall25.0%
Math
Competition Math94.7%
Specs
—
Context
—
Max output
—
Released
1M
Context
128K
Max output
Jun 2026
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Pricing not available
Live pricing, shown before you run
Input$2.00/M tokens
Output$10.00/M tokens
Cache read$0.20/M tokens
Cache write$2.50/M tokens
Web search$0.01/search
Chat with ERNIE 4.5 21B ThinkingGo to model
Chat with Claude Sonnet 5Go to model
Frequently Asked Questions: ERNIE 4.5 21B Thinking vs Claude Sonnet 5▼

Which is better, ERNIE 4.5 21B Thinking or Claude Sonnet 5?

▼

Both ERNIE 4.5 21B Thinking and Claude Sonnet 5 are capable AI models. The best choice depends on your specific use case: consider pricing, context window, speed, and which capabilities (vision, reasoning, audio) you need.

Do both ERNIE 4.5 21B Thinking and Claude Sonnet 5 support vision?

▼

Claude Sonnet 5 supports vision/image input, but ERNIE 4.5 21B Thinking does not.

What are the key differences between ERNIE 4.5 21B Thinking and Claude Sonnet 5?

▼

Key differences: only Claude Sonnet 5 supports vision input. Compare full specs on this page.

Which model should I choose for my use case?

▼

If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both ERNIE 4.5 21B Thinking and Claude Sonnet 5 for free on idapt.app to see which performs better for your specific needs.

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