Claude Haiku 4.5 vs GPT-5.6 Luna: API Pricing Comparison
Anthropic Claude Haiku 4.5 vs OpenAI GPT-5.6 Luna — token prices, batch and cache rates, Arena ELO, and cost per request for 8 business use cases. Prices in USD per 1 million tokens. Data snapshot: 2026-08-14.
Claude Haiku 4.5 pricing (Anthropic)
- Input: $1.00 per 1M tokens
- Output: $5.00 per 1M tokens
- Batch API (input/output): $0.50 / $2.50
- Prompt-cache read: $0.10
- Context window: 200K
- Arena ELO: 1392 (as of 2026-08-13)
- Full Claude Haiku 4.5 pricing page
GPT-5.6 Luna pricing (OpenAI)
- Input: $0.10 per 1M tokens
- Output: $0.60 per 1M tokens
- Batch API (input/output): $0.10 / $0.60
- Prompt-cache read: $0.01
- Context window: 1M
- Full GPT-5.6 Luna pricing page
Cost per request by business use case
List price vs optimized (prompt caching on the cached input share, batch API for async workloads — only where the provider publishes those rates).
| Use case | Tokens (in/out) | Claude Haiku 4.5 list | Claude Haiku 4.5 optimized | GPT-5.6 Luna list | GPT-5.6 Luna optimized |
|---|---|---|---|---|---|
| Support Ticket | 1,500 / 500 | $0.0040 | $0.0032 | $0.000450 | $0.000369 |
| Knowledge Q&A | 2,000 / 800 | $0.0060 | $0.0047 | $0.000680 | $0.000554 |
| Meeting Summary | 10,000 / 1,200 | $0.016 | $0.0076 | $0.0017 | $0.0016 |
| Marketing Content | 2,500 / 1,800 | $0.011 | $0.011 | $0.0013 | $0.0013 |
| Coding Task | 3,000 / 2,000 | $0.013 | $0.012 | $0.0015 | $0.0014 |
| Invoice Processing | 1,500 / 600 | $0.0045 | $0.0021 | $0.000510 | $0.000469 |
| Call Summary | 2,000 / 700 | $0.0055 | $0.0027 | $0.000620 | $0.000602 |
| Agent Workflow | 6,000 / 3,000 | $0.021 | $0.017 | $0.0024 | $0.0020 |
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These are list prices — real cost also depends on caching, batching, negotiated discounts, marketplace agreements, and existing contracts. Get a FinOps review from OptimNow or compare all models.