GPT-5.6 Luna vs Claude Fable 5.1
GPT-5.6 Luna is cheaper on output tokens, while GPT-5.6 Luna offers a larger context window. Choose GPT-5.6 Luna or Claude Fable 5.1 based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | GPT-5.6 Luna | Claude Fable 5.1 |
|---|---|---|
| Provider | Prime Inference | Prime Inference |
| Input / 1M tokens | $0.20 | $10.00 |
| Output / 1M tokens | $1.20 | $50.00 |
| Context window | 1.1M | 1M |
| Parameters | — | — |
| Open weights | No | No |
| Released | Jul 2026 | Sep 2026 |
FAQ
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.