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GPT-6 Luna vs Claude Haiku 4.5: API cost

Standard, cached and batch API prices for GPT-6 Luna (OpenAI) and Claude Haiku 4.5 (Anthropic), and what each costs for your usage.

Prices last checked: how

GPT-6 Luna is cheaper than Claude Haiku 4.5 at standard rates, with 10× cheaper input and 10× cheaper output.

Your usage
GPT-6 Luna / month $7.80 $0.00026 per request
  • Input $3.00
  • Cached input $0.3
  • Output $4.50
Claude Haiku 4.5 / month $78.00 $0.0026 per request
  • Input $30.00
  • Cached input $3.00
  • Output $45.00
GPT-6 Luna is cheaper for this usage by $70.20 a month (90% less).

How cost changes with reply length

  • GPT-6 Luna
  • Claude Haiku 4.5
$0$2$4$602004006008001,000Output tokens per 1,000 input tokensGPT-6 LunaClaude Haiku 4.5
Cost of 1,000 requests with 1,000 input tokens each, at standard rates without caching. Hover or use the arrow keys to read values.
Show as a table
Output tokensGPT-6 LunaClaude Haiku 4.5
0$0.1$1.00
250$0.23$2.25
500$0.35$3.50
750$0.47$4.75
1,000$0.6$6.00

Price per million tokens

Token typeGPT-6 LunaClaude Haiku 4.5
Input$0.10$1
Cached input$0.01$0.10
Output$0.50$5
Batch input$0.05$0.50
Batch cached input$0.005$0.05
Batch output$0.25$2.50

GPT-6 Luna: Long prompts are billed at higher long-context rates.

Standard rates in USD, before tax OpenAI API pricing Claude API pricing

Monthly cost for typical workloads

WorkloadGPT-6 LunaClaude Haiku 4.5
Support chatbot
2,000 in / 300 out tokens, 1,000 requests a day, 50% cached
$7.80$78.00
Document summaries
10,000 in / 800 out tokens, 200 requests a day
$8.40$84.00
Tagging / classifying
400 in / 20 out tokens, 20,000 requests a day
$30.00$300.00
Standard rates in USD, before tax. A month is 30 days.

Or see GPT-6 Luna pricing, Claude Haiku 4.5 pricing, or compare any two models.

FAQ

Frequently asked questions

Is GPT-6 Luna cheaper than Claude Haiku 4.5?

GPT-6 Luna is cheaper than Claude Haiku 4.5 at standard rates, with 10× cheaper input and 10× cheaper output. Based on standard API rates last checked on 30 Sept 2026.

How much do GPT-6 Luna and Claude Haiku 4.5 cost per million tokens?

GPT-6 Luna: $0.10 per million input tokens and $0.50 per million output tokens. Claude Haiku 4.5: $1 input and $5 output. These are standard rates in USD, before tax, from each provider’s own pricing page.

Which is cheaper with the Batch API?

GPT-6 Luna’s batch rates are $0.05 input and $0.25 output per million tokens (50% off); Claude Haiku 4.5’s batch rates are $0.50 input and $2.50 output per million tokens (50% off).

Does prompt caching change the comparison?

GPT-6 Luna charges $0.01 per million cached input tokens, against $0.10 for normal input; Claude Haiku 4.5 charges $0.10 per million cached input tokens, against $1 for normal input. Cache write and storage charges are extra and aren’t included here.

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