Question 1

Which model should I use for a chatbot, code generation or document analysis?

Accepted Answer

Chatbot: GPT-5.4 Mini or Claude Haiku 4.5 for latency; DeepSeek V3.2 for cost. Code: Claude Opus 4.6 and GPT-5.4 still lead the benchmarks, with o3 and DeepSeek R1 for hard reasoning. Document analysis: you need a large window — Gemini 3.1 Pro, Claude Opus or Llama 4 Maverick. Use the Model Finder above for a personalised pick.

Question 2

How does GPT-5.4 differ from Claude Opus 4.6?

Accepted Answer

GPT-5.4 is faster, half the input price ($2.50 vs $5 per 1M) and has better function-calling and batch API ergonomics. Claude Opus 4.6 wins at long-form writing, large codebases and strict multi-step instructions. Both ship 1M-token context windows. If cost is no issue: Claude for long text and craft; GPT-5.4 for latency and volume.

Question 3

How do I cut AI costs in my application?

Accepted Answer

Five levers: (1) cache system prompts (saves 50-90%), (2) batch API for non-urgent requests (50% off), (3) smaller model for simple tasks and flagship only when needed (complexity router), (4) trim prompts and cap output tokens, (5) fine-tune or use RAG instead of re-sending the same context every call. At Letbrand we audit each lever and typically cut costs by 40-80%.

Question 4

How do you at Letbrand pick the model for a client?

Accepted Answer

We map the use case against three axes: required quality, acceptable latency and monthly cost. We A/B 2-3 candidates on a real client dataset and measure accuracy + cost + latency. Then we wire caching, complexity routing and observability. The result is typically 40-80% cheaper than the obvious first pick. Want us to do it for you? Let's talk.

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Frequently asked questions about AI models and pricing

Which model should I use for a chatbot, code generation or document analysis?

How does GPT-5.4 differ from Claude Opus 4.6?

How do I cut AI costs in my application?

How do you at Letbrand pick the model for a client?

Frequently asked questions about AI models and pricing

Which model should I use for a chatbot, code generation or document analysis?

How does GPT-5.4 differ from Claude Opus 4.6?

How do I cut AI costs in my application?

How do you at Letbrand pick the model for a client?