Is Haiku 4.5 cheaper than GPT-5.5?

Yes — Haiku 4.5 is dramatically cheaper. Haiku 4.5 costs $1.00/M input and $5.00/M output, while GPT-5.5 costs $5.00/M input and $30.00/M output. That's 80% cheaper on input and 83% cheaper on output.

Which is better for chatbots — GPT-5.5 or Haiku 4.5?

For most chatbot deployments, Haiku 4.5 is the better choice due to its 80-83% lower cost and sufficient quality for conversational AI. Choose GPT-5.5 when you need premium reasoning quality or the 1.05M context window for complex multi-turn conversations.

How much would I save using Haiku 4.5 instead of GPT-5.5?

For a workload of 1M input + 500K output tokens/month, Haiku 4.5 costs $3.50/month vs GPT-5.5's $20/month — saving $16.50/month (83%). At scale (10M input + 5M output), you save $165/month — $1,980/year.

When should I choose GPT-5.5 over Haiku 4.5?

Choose GPT-5.5 when: (1) you need premium quality reasoning for complex analytical tasks, (2) you need a 1M+ token context window for large document processing, (3) quality matters more than cost for your use case. For everything else, Haiku 4.5 delivers excellent quality at 80-83% lower cost.