Price comparison · checked October 12, 2026

Claude Haiku 5.5 vs GPT-6 Luna pricing

For a typical support chatbot, Claude Haiku 5.5 and GPT-6 Luna cost the same: $18.00 a month.

	Claude Haiku 5.5	GPT-6 Luna
Provider	Anthropic	OpenAI
Input / 1M	$0.10	$0.10
Cached input / 1M	$0.010	$0.010
Output / 1M	$0.50	$0.50
Context window	1M	1.05M
Notes	5× price for prompts over 100K tokens	Short-context rate

Monthly cost by workload

Workload	Claude Haiku 5.5	GPT-6 Luna	Difference
Support chatbot 60,000 req · 1,500 in / 300 out	$18.00	$18.00	Same
Document summaries 20,000 req · 6,000 in / 400 out	$16.00	$16.00	Same
Coding assistant 30,000 req · 4,000 in / 800 out	$24.00	$24.00	Same
RAG search 100,000 req · 2,500 in / 250 out	$37.50	$37.50	Same

Standard rates, no caching or batch discounts. Sources: developers.openai.com · platform.claude.com

Start from a use case

Requests per month Input tokens per request Output tokens per request

1,000 tokens is about 750 English words. Input includes your system prompt, chat history and any retrieved documents.

AnthropicCheapest

$18.00 /mo

OpenAICheapest

$18.00 /mo