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Model cost comparisonClaude Haiku 5.5 vs GPT-6 Luna: Cost
Claude Haiku 5.5 and GPT-6 Luna side by side, using prices from each provider's own pricing page.
At list price, Claude Haiku 5.5 costs about 1.0x less per typical request than GPT-6 Luna.
Price per token
| USD per 1M tokens | Claude Haiku 5.5 | GPT-6 Luna |
|---|---|---|
| Input | $0.10 | $0.10 |
| Cached input / cache reads | $0.01 | $0.01 |
| Output | $0.50 | $0.50 |
| Batch input | $0.05 | $0.05 |
| Batch output | $0.25 | $0.25 |
| 1,000 typical requests | $0.40 | $0.40 |
| 1M typical requests a month | $400 | $400 |
A typical request here is 2,000 input and 400 output tokens. Prices checked October 30, 2026.
Claude Haiku 5.5 costs more for prompts over 100,000 tokens: $0.50 input and $2.50 output. Claude Haiku 5.5 uses a newer tokenizer that counts the same text as about 30% more tokens, so compare cost per task, not just price per token.
Which is cheaper?
At list price, Claude Haiku 5.5 is about 1.0x cheaper than GPT-6 Luna for the same typical request. But price per token isn't cost per task. What matters is the cost of a successful result: a cheaper model that needs retries, longer prompts or more output can end up costing more.
How to decide
- Pick 50 to 200 real requests and the answers you'd accept.
- Run both models on them and record pass rate, tokens used and latency.
- Divide total cost by the number of passing answers: that's your cost per successful task.
- Route each kind of request to the model with the lowest cost per successful task.
Use both
You don't have to choose one. apicuts routes each request to the lowest-cost model that passes your evaluations, with your approval, and guarantees at least 20% lower cost after our fee. See how routing works.
Frequently asked questions
Is Claude Haiku 5.5 cheaper than GPT-6 Luna?
Per typical request at list price, Claude Haiku 5.5 is cheaper: $0.40 vs $0.40 per 1,000 requests of 2,000 input and 400 output tokens.
Should I switch from GPT-6 Luna to Claude Haiku 5.5?
Only for the requests where it passes your quality checks. Test on your own evaluation set first, then route the requests that pass.
Sources: Anthropic's pricing page, OpenAI's API pricing page. Checked October 30, 2026.
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