GPT-5.4 Mini vs Claude Haiku 4.5
Complete 2025 Comparison
Side-by-side comparison of GPT-5.4 Mini and Claude Haiku 4.5. Compare performance, pricing, capabilities, context windows, and more to choose the best AI model for your needs.
Quick Comparison
| Feature | GPT-5.4 Mini | Claude Haiku 4.5 | Winner |
|---|---|---|---|
| Provider | OpenAI | Anthropic | - |
| Context Window | 400,000 tokens | 200,000 tokens | GPT-5.4 Mini |
| Output Limit | 16,384 tokens | 64,000 tokens | Claude Haiku 4.5 |
| Speed | fast | fastest | Tie |
| Vision Support | Yes | Yes | Both |
| Function Calling | Yes | Yes | Both |
| Reasoning | Yes | Yes | Both |
| Code Generation | Yes | Yes | Both |
| Total Capabilities | 7 | 9 | Claude Haiku 4.5 |
| Tier | advanced | starter | - |
Performance Comparison
⚡GPT-5.4 Mini
Smaller GPT-5.4 variant tuned for fast multimodal chat, tool use, and lower-cost reasoning workloads.
⚡Claude Haiku 4.5
Blazing-fast model with exceptional coding, reasoning, and computer-use capabilities. Ideal for agentic workflows and real-time applications. Third the cost of Sonnet 4.
Capabilities & Features
GPT-5.4 Mini Capabilities
- ✓reasoning
- ✓vision
- ✓multimodal
- ✓analysis
- ✓function calling
- ✓code generation
- ✓fast response
Claude Haiku 4.5 Capabilities
- ✓reasoning
- ✓vision
- ✓function calling
- ✓extended thinking
- ✓multimodal
- ✓code generation
- ✓code execution
- ✓analysis
- ✓tool use
Which Should You Choose?
⚡Choose GPT-5.4 Mini if you need:
- •Larger context window (400,000 vs 200,000 tokens) for processing long documents or extensive conversations
- •Faster response times (fast speed rating)
- •OpenAI ecosystem integration
⚡Choose Claude Haiku 4.5 if you need:
- •Anthropic ecosystem integration
Best of Both Worlds
With JustSimpleChat, you don't have to choose! Access both GPT-5.4 Mini and Claude Haiku 4.5in 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, GPT-5.4 Mini or Claude Haiku 4.5?
The choice between GPT-5.4 Mini and Claude Haiku 4.5 depends on your specific needs. GPT-5.4 Mini has a larger context window (400,000 vs 200,000 tokens), making it better for long documents. Claude Haiku 4.5 delivers excellent reasoning capabilities. Try both on JustSimpleChat to see which fits your workflow.
Is GPT-5.4 Mini faster than Claude Haiku 4.5?
Speed comparison: GPT-5.4 Mini is rated as "fast" while Claude Haiku 4.5 is rated as "fastest". GPT-5.4 Mini typically delivers faster responses. However, actual speed can vary based on request complexity, server load, and the specific task being performed.
Which costs less, GPT-5.4 Mini or Claude Haiku 4.5?
Pricing comparison: Pricing varies by provider and usage tier. On JustSimpleChat, you can access both models with transparent usage tracking and flexible pricing plans.
Does GPT-5.4 Mini have a larger context window than Claude Haiku 4.5?
Context window comparison: GPT-5.4 Mini supports 400,000 input tokens, while Claude Haiku 4.5 supports 200,000 tokens. GPT-5.4 Mini has a 100% larger context window, making it better for processing long documents, entire codebases, or extensive conversations.
Which is better for coding, GPT-5.4 Mini or Claude Haiku 4.5?
For coding tasks: Both GPT-5.4 Mini and Claude Haiku 4.5 support code generation. Claude Haiku 4.5 includes code execution capabilities for interactive development. Test both on JustSimpleChat with your actual code to find the best fit.
Can I use both GPT-5.4 Mini and Claude Haiku 4.5 on JustSimpleChat?
Yes! JustSimpleChat provides access to both GPT-5.4 Mini and Claude Haiku 4.5, 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 GPT-5.4 Mini and Claude Haiku 4.5?
Key differences: 1) Context Window: GPT-5.4 Mini (400,000 tokens) vs Claude Haiku 4.5 (200,000 tokens). 2) Speed: fast vs fastest. 3) Capabilities: GPT-5.4 Mini supports reasoning, vision, multimodal, analysis, function_calling, code_generation, fast_response, while Claude Haiku 4.5 supports reasoning, vision, function_calling, extended_thinking, multimodal, code_generation, code_execution, analysis, tool_use. 4) Provider: OpenAI vs Anthropic. 5) Use Cases: GPT-5.4 Mini excels at smaller gpt-5.4 variant tuned for fast multimodal chat, tool use, and lower-cost reasoning workloads., while Claude Haiku 4.5 is optimized for blazing-fast model with exceptional coding, reasoning, and computer-use capabilities. ideal for agentic workflows and real-time applications. third the cost of sonnet 4..
How do I choose between GPT-5.4 Mini and Claude Haiku 4.5?
Choose GPT-5.4 Mini if you need a larger context window for long documents. Choose Claude Haiku 4.5 if you prioritize multimodal understanding with vision. The best way to decide is to try both on JustSimpleChat with your actual use cases.
Is GPT-5.4 Mini or Claude Haiku 4.5 better for business use?
For business applications: Both models are suitable for business use. Consider factors like context window (GPT-5.4 Mini: 400,000, Claude Haiku 4.5: 200,000), pricing, and specific capabilities. JustSimpleChat offers team plans with both models, centralized billing, and usage analytics.
Can I compare GPT-5.4 Mini and Claude Haiku 4.5 side-by-side?
Yes! On JustSimpleChat, you can compare GPT-5.4 Mini and Claude Haiku 4.5 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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