Claude Haiku vs GPT Luna
Two small models that now list at the same $0.10 and $0.50 per million tokens, though Haiku 5.5 charges more once a prompt passes 100K tokens. Both carry long context windows. If you are doing short, high-frequency tasks the difference rarely shows up, pick the one whose family you already use and stop optimising.
| Claude Haiku | GPT Luna | |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Current release | Haiku 5.5 | GPT-6 Luna |
| Tier | Fast & cheap | Fast & cheap |
| Context | 1M | 1M |
| Cost | Low cost | Low cost |
| Modalities | text, vision | text, vision |
| Open weights | No | No |
Cost is a tier, not a quote, providers change prices often. Check Anthropic and OpenAI before you commit. Last updated 2026-10-21.
Which one to pick
Claude HaikuAnthropic · Haiku 5.5
High-volume, low-latency work where speed and cost matter most
Reach for it when- Extraction and classification inside a Claude pipeline
- You want vision on a small model
GPT LunaOpenAI · GPT-6 Luna
Classification, routing, and extraction at volume
Reach for it when- Long inputs at the cheapest tier
- High-volume routing in an OpenAI stack