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ERNIE 4.5 21B Thinking vs Claude Opus 5

At a glance

Compact ERNIE 4.5 model with always-on thinking mode.

131K ctx

Anthropic's flagship for demanding reasoning, coding, and long-horizon agentic work.

1M ctx$5.00/$25.00 per M
Demos
All demos

No shared demos for these models yet.

AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
No benchmarks available

This model hasn't been benchmarked yet.

Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:OpenRouter
Specs
131K
Context
33K
Max output
—
Released
1M
Context
128K
Max output
Jul 2026
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Pricing not available
Live pricing, shown before you run
Input$5.00/M tokens
Output$25.00/M tokens
Cache read$0.50/M tokens
Cache write$6.25/M tokens
Web search$0.01/search
Chat with ERNIE 4.5 21B ThinkingGo to model
Chat with Claude Opus 5Go to model
Frequently Asked Questions: ERNIE 4.5 21B Thinking vs Claude Opus 5▼

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

▼

Both ERNIE 4.5 21B Thinking and Claude Opus 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.

Which has a larger context window, ERNIE 4.5 21B Thinking or Claude Opus 5?

▼

Claude Opus 5 has a larger context window: ERNIE 4.5 21B Thinking supports 131K tokens vs Claude Opus 5 at 1M tokens.

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

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Claude Opus 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 Opus 5?

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Key differences: only Claude Opus 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 Opus 5 for free on idapt.app to see which performs better for your specific needs.

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