Claude Haiku 5.5 vs GPT-6 Luna
Anthropic vs OpenAI · prices and specs, line by line
Claude Haiku 5.5 (Anthropic) vs GPT-6 Luna (OpenAI), side by side: input/output/cache-hit prices, time-based pricing, context window, modalities and a fixed-assumption monthly cost. Green marks the better row.
| Dimension | Claude Haiku 5.5 | GPT-6 Luna |
|---|---|---|
| Vendor / channel | Anthropic | OpenAI |
| Context window | 1024K | 1050K |
| Modalities | Text, Image understanding | Text, Image understanding |
| Features | Low-cost, lightweight, Subtask agent | Low cost at scale, Efficient, lightweight |
| Input (cache miss) | Prompt ≤100K $0.1 Prompt >100K $0.5 | Input ≤272K $0.1 Input >272K (long context) not published |
| Output | Prompt ≤100K $0.5 Prompt >100K $2.5 | Input ≤272K $0.5 Input >272K (long context) not published |
| Cache hit | Prompt ≤100K $0.01 Prompt >100K $0.05 | Input ≤272K $0.01 Input >272K (long context) not published |
| Time-based pricing | ||
| Est. monthly cost* | $1.64 (tied) | $1.64 (tied) |
| Price source | Anthropic official pricing | OpenAI API pricing |
| Verified | 2026-10-28 | 2026-10-28 |
* Fixed assumptions for the example monthly cost: 100 calls/day · 2,000 input / 800 output tokens per call · off-peak rates · 30% cache hit rate · 30-day month — the same formula and defaults as the cost calculator. USD models are converted to CNY at the reference rate for comparison (see summary). Costs within display precision are marked tied; neither side is favored.
Comparison summary (fixed usage basis)
- Estimated monthly cost is tied: on a common CNY basis both come to about ¥11.00 (identical within display precision).
- Cost ratio: equal under this basis; this conclusion holds only at the current list prices, reference rate and the fixed usage assumptions above.
- Input unit price (off-peak / single-price basis) tied after conversion: both ≈ ¥0.67 (list prices $0.1 / $0.1).
- Output unit price (off-peak / single-price basis) tied after conversion: both ≈ ¥3.36 (list prices $0.5 / $0.5).
- Cache-hit price (off-peak basis): Claude Haiku 5.5 $0.01; GPT-6 Luna $0.01.
- Context window: Claude Haiku 5.5 1024K vs GPT-6 Luna 1050K — GPT-6 Luna is 1.0× Claude Haiku 5.5.
- Modalities: identical — Text, Image understanding.
- Price sources: Anthropic official pricing (verified 2026-10-28), OpenAI API pricing (verified 2026-10-28); unit: official list price per 1M tokens (Claude Haiku 5.5 in USD, GPT-6 Luna in USD).
These are computations from published list prices under fixed call volume, token usage, cache assumptions and billing rules. They are not rankings of capability, output quality or overall value, and do not constitute purchase advice.