Claude Opus 4 vs Claude Sonnet 4
Complete 2025 Comparison
Side-by-side comparison of Claude Opus 4 and Claude Sonnet 4. Compare performance, pricing, capabilities, context windows, and more to choose the best AI model for your needs.
Quick Comparison
| Feature | Claude Opus 4 | Claude Sonnet 4 | Winner |
|---|---|---|---|
| Provider | Anthropic | Anthropic | - |
| Context Window | 200,000 tokens | 200,000 tokens | Tie |
| Output Limit | 32,000 tokens | 64,000 tokens | Claude Sonnet 4 |
| Speed | deep | balanced | Claude Sonnet 4 |
| Input Price | $15/1K tokens | $3/1K tokens | Claude Sonnet 4 |
| Output Price | $75/1K tokens | $15/1K tokens | Claude Sonnet 4 |
| Vision Support | Yes | Yes | Both |
| Function Calling | Yes | Yes | Both |
| Reasoning | Yes | Yes | Both |
| Code Generation | No | No | Neither |
| Total Capabilities | 6 | 6 | Tie |
| Tier | max | advanced | - |
Performance Comparison
💎Claude Opus 4
High-performance flagship model with exceptional intelligence and web search
âš¡Claude Sonnet 4
High-performance model with exceptional reasoning, efficiency, and web search
Pricing Comparison
Claude Opus 4 Pricing
Claude Sonnet 4 Pricing
💡 Pro Tip: On JustSimpleChat, you pay the same API rates as going direct to providers, but with the convenience of one unified platform, transparent usage tracking, and the ability to switch between 600+ models instantly.
Capabilities & Features
Claude Opus 4 Capabilities
- ✓reasoning
- ✓vision
- ✓function calling
- ✓extended thinking
- ✓native web search
- ✓multimodal
Claude Sonnet 4 Capabilities
- ✓reasoning
- ✓vision
- ✓function calling
- ✓extended thinking
- ✓native web search
- ✓multimodal
Which Should You Choose?
💎Choose Claude Opus 4 if you need:
- •Anthropic ecosystem integration
âš¡Choose Claude Sonnet 4 if you need:
- •More cost-effective pricing ($3 vs $15 per 1K input tokens)
- •Anthropic ecosystem integration
Best of Both Worlds
With JustSimpleChat, you don't have to choose! Access both Claude Opus 4 and Claude Sonnet 4in the same conversation. Switch models mid-chat, compare responses side-by-side, or let our smart routing automatically select the best model for each task.
Try Both Models FreeFrequently Asked Questions
Which is better, Claude Opus 4 or Claude Sonnet 4?
The choice between Claude Opus 4 and Claude Sonnet 4 depends on your specific needs. Claude Opus 4 excels at deep reasoning and complex tasks. Claude Sonnet 4 delivers excellent reasoning capabilities. Try both on JustSimpleChat to see which fits your workflow.
Is Claude Opus 4 faster than Claude Sonnet 4?
Speed comparison: Claude Opus 4 is rated as "deep" while Claude Sonnet 4 is rated as "balanced". Both models offer similar response times. However, actual speed can vary based on request complexity, server load, and the specific task being performed.
Which costs less, Claude Opus 4 or Claude Sonnet 4?
Pricing comparison: Claude Opus 4 costs $15/1K input tokens and $75/1K output tokens, while Claude Sonnet 4 costs $3/1K input and $15/1K output. Claude Sonnet 4 is more affordable for input processing. On JustSimpleChat, you can access both models with transparent usage tracking and flexible pricing plans.
Does Claude Opus 4 have a larger context window than Claude Sonnet 4?
Context window comparison: Claude Opus 4 supports 200,000 input tokens, while Claude Sonnet 4 supports 200,000 tokens. Both models have the same context window capacity.
Which is better for coding, Claude Opus 4 or Claude Sonnet 4?
For coding tasks: Both models can assist with coding, though neither is specifically optimized for it. Test both on JustSimpleChat with your actual code to find the best fit.
Can I use both Claude Opus 4 and Claude Sonnet 4 on JustSimpleChat?
Yes! JustSimpleChat provides access to both Claude Opus 4 and Claude Sonnet 4, along with 600+ other AI models. You can switch between models mid-conversation, compare responses side-by-side, or let our smart routing automatically select the best model for each task. Start with our free tier to try both models, or upgrade for higher usage limits and additional features.
What are the main differences between Claude Opus 4 and Claude Sonnet 4?
Key differences: 1) Context Window: Claude Opus 4 (200,000 tokens) vs Claude Sonnet 4 (200,000 tokens). 2) Speed: deep vs balanced. 3) Capabilities: Claude Opus 4 supports reasoning, vision, function_calling, extended_thinking, native_web_search, multimodal, while Claude Sonnet 4 supports reasoning, vision, function_calling, extended_thinking, native_web_search, multimodal. 4) Provider: Anthropic vs Anthropic. 5) Use Cases: Claude Opus 4 excels at high-performance flagship model with exceptional intelligence and web search, while Claude Sonnet 4 is optimized for high-performance model with exceptional reasoning, efficiency, and web search.
How do I choose between Claude Opus 4 and Claude Sonnet 4?
Choose Claude Opus 4 if you need advanced reasoning capabilities. Choose Claude Sonnet 4 if you prioritize multimodal understanding with vision. The best way to decide is to try both on JustSimpleChat with your actual use cases.
Is Claude Opus 4 or Claude Sonnet 4 better for business use?
For business applications: Claude Opus 4 is designed for enterprise use with 200,000 token context and advanced features. Consider factors like context window (Claude Opus 4: 200,000, Claude Sonnet 4: 200,000), pricing, and specific capabilities. JustSimpleChat offers team plans with both models, centralized billing, and usage analytics.
Can I compare Claude Opus 4 and Claude Sonnet 4 side-by-side?
Yes! On JustSimpleChat, you can compare Claude Opus 4 and Claude Sonnet 4 side-by-side by using our model comparison feature. Send the same prompt to both models simultaneously and see how they respond. This helps you understand their different strengths, response styles, and performance characteristics for your specific use cases. Available on all plans including free tier.
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