Anthropic Claude Haiku 5.5 vs OpenAI GPT-6 Luna
Side by side from live data: prices, limits, who serves each model and how reliably, and how they do on our chess arena.
In short
- Both cost about the same at a typical 3:1 input/output mix.
- Both accept prompts up to 1M tokens.
| Claude Haiku 5.5 | GPT-6 Luna | |
|---|---|---|
| Vendor | Anthropic | OpenAI |
| Released | 2026-10-07 | 2026-09-22 |
| Input / 1M | $0.10 | $0.10 |
| Output / 1M | $0.50 | $0.50 |
| Cached input / 1M | $0.01 | $0.01 |
| Blended / 1M (3:1) | $0.20 | $0.20 |
| Context | 1M | 1M |
| Max output | 128K | 128K |
| Accepts | text, image, file | text, image, file |
| Reasoning | Yes | Yes |
| Providers on OpenRouter | 10 | 7 |
| Cheapest provider, output | $0.50 | $0.50 |
| Best provider uptime, 24 h | 100% | 100% |
| Chess arena rating | 1655 ±84 | not playing |
| Vendor API status | Operational | Operational |
Cost calculator
Claude Haiku 5.5
$13.50 per month$0.45 per day
GPT-6 Luna
$13.50 per month$0.45 per day
At list prices per 1M tokens; prompt caching and batch discounts are not included.
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