Model comparison - Similar price, same tier
Claude Haiku 5.5 vs GPT-6 Luna
Claude Haiku 5.5 is from Anthropic and GPT-6 Luna is from OpenAI. Both list the same first-party API price: $0.10 per 1M input tokens and $0.50 per 1M output tokens. Claude Haiku 5.5 has a 1,000,000-token context window and GPT-6 Luna 1,050,000 tokens, and both return up to 128,000 output tokens per response. Claude Haiku 5.5 was released on October 7, 2026 and GPT-6 Luna on September 22, 2026. Both are closed-weights models, available only through an API.
Last verified from each provider's pricing page. All sources
Side-by-side specs
| Spec | Claude Haiku 5.5 | GPT-6 Luna |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Input / 1M tokens | $0.10 | $0.10 |
| Output / 1M tokens | $0.50 | $0.50 |
| Cache read / 1M | $0.01 | $0.01 |
| Cache write / 1M | $0.125 | $0.125 |
| Batch input / 1M | $0.05 | $0.05 |
| Batch output / 1M | $0.25 | $0.25 |
| Long-context rates above | 100,000 tokens | 272,000 tokens |
| Context window | 1,000,000 | 1,050,000 |
| Max output | 128,000 | 128,000 |
| Release date | ||
| Weights | Closed | Closed |
| API model id | claude-haiku-5-5 | gpt-6-luna |
| AI Gateway id | anthropic/claude-haiku-5.5 | openai/gpt-6-luna |
| Last verified |
Prices in USD per 1M tokens at each provider's standard first-party rate. A dash means the provider does not bill that item separately or no primary page states it.
What each costs in practice
The same three workloads every model page uses, worked from each model's standard list rates. Swap in your own token counts with the math on each model's page.
| Workload | Claude Haiku 5.5 | GPT-6 Luna |
|---|---|---|
| One agent session1M input tokens and 100K output tokens, no caching. | $0.15 | $0.15 |
| A chat app10,000 requests a day at 2K input and 500 output tokens each. | $4.50$135.00 per 30-day month | $4.50$135.00 per 30-day month |
| The same session at a 90% cache hit90% of the input is read from the prompt cache. The one-time cache write premium is not included. | $0.069 | $0.069 |
Show the math
Claude Haiku 5.5
- One agent sessionInput: 1M x $0.10 = $0.10Output: 0.1M x $0.50 = $0.05
- A chat appInput: 20M x $0.10 = $2.00Output: 5M x $0.50 = $2.50
- The same session at a 90% cache hitCached input: 0.9M x $0.01 = $0.009Uncached input: 0.1M x $0.10 = $0.01Output: 0.1M x $0.50 = $0.05
GPT-6 Luna
- One agent sessionInput: 1M x $0.10 = $0.10Output: 0.1M x $0.50 = $0.05
- A chat appInput: 20M x $0.10 = $2.00Output: 5M x $0.50 = $2.50
- The same session at a 90% cache hitCached input: 0.9M x $0.01 = $0.009Uncached input: 0.1M x $0.10 = $0.01Output: 0.1M x $0.50 = $0.05
Benchmarks under the same setting
No board in the benchmark directory lists both Claude Haiku 5.5 and GPT-6 Luna under the same setting, so there is no like-for-like score to show here.
Set them up in your tools
Step-by-step guides whose official docs list Claude Haiku 5.5 or GPT-6 Luna by model id.
Model pages
FAQ
How do Claude Haiku 5.5 and GPT-6 Luna compare on price?
Both list the same first-party API price: $0.10 per 1M input tokens and $0.50 per 1M output tokens. For one agent session of 1M input and 100K output tokens with no caching, that is $0.15 on Claude Haiku 5.5 and $0.15 on GPT-6 Luna. Prices are each provider's first-party list rates, verified October 17, 2026 and October 17, 2026.
What are the context windows of Claude Haiku 5.5 and GPT-6 Luna?
Claude Haiku 5.5 has a 1,000,000-token context window and GPT-6 Luna 1,050,000 tokens, and both return up to 128,000 output tokens per response.
Are Claude Haiku 5.5 and GPT-6 Luna open weights?
Claude Haiku 5.5 is closed-weights and is called through Anthropic's API as claude-haiku-5-5. GPT-6 Luna is closed-weights and is called through OpenAI's API as gpt-6-luna.
More comparisons
- Claude Haiku 5.5 vs DeepSeek V4.1 FlashOpen weights vs closed
- DeepSeek V4.1 Flash vs GPT-6 LunaOpen weights vs closed
- Claude Haiku 5.5 vs GLM-5.3-FlashSimilar price, same tier
- GLM-5.3-Flash vs GPT-6 LunaSimilar price, same tier
- Claude Haiku 5.5 vs Qwen3.8-FlashSimilar price, same tier
- GPT-6 Luna vs Qwen3.8-FlashSimilar price, same tier
- Claude Haiku 5.5 vs MiniMax-M3Open weights vs closed
- GPT-5.6 Luna vs GPT-6 LunaSame provider, successor
Sources
Claude Haiku 5.5 verified from platform.claude.com; GPT-6 Luna verified from developers.openai.com. This page is as current as the older of the two: .
- https://platform.claude.com/docs/en/about-claude/pricing
- https://developers.openai.com/api/docs/pricing
- https://platform.claude.com/docs/en/models/haiku-5-5/overview
- https://platform.claude.com/docs/en/about-claude/models/overview
- https://platform.claude.com/docs/en/release-notes/overview
- https://developers.openai.com/api/docs/models/gpt-6-luna
- https://developers.openai.com/api/docs/changelog
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