Claude Fable 5.1 vs 
GPT-5.6 Luna
GPT-5.6 Luna is cheaper than Claude Fable 5.1 at $1/M vs $10/M input tokens.
Pokémon Battle UI Recreation
Pokémon battle screen you can actually click. One HTML file.
Loading the build
Loading the build
Which answer wins?
Price and specs
Not enough votes to call it. On the specs, Claude Fable 5.1 has the edge: bigger model tier, newer. GPT-5.6 Luna costs 8.3x less per token.
| Spec | Claude Fable 5.1 | GPT-5.6 Luna |
|---|---|---|
| Input price | $10/M tokens | $1/M tokens |
| Output price | $50/M tokens | $6/M tokens |
| Context window | 1.0M tokens | 1.1M tokens |
| Weights | Closed | Closed |
| Free API (OpenRouter) | No | No |
| Released | Sep 2026 | Jul 2026 |
| At 10M a month | $100 | $10.00 |
Input tokens at list price. No caching, no batch discount.
Where to run it
Per million tokens. Prices and uptime via OpenRouter, checked 7 Oct 2026.
Common questions
What is the difference between Claude Fable 5.1 and GPT-5.6 Luna?
Claude Fable 5.1 is developed by Anthropic while GPT-5.6 Luna is developed by OpenAI. Claude Fable 5.1 has a 1.0M token context window vs GPT-5.6 Luna's 1.1M. You can compare their actual outputs across 10 challenges on Rival to see how they differ in practice.
Which is better, Claude Fable 5.1 or GPT-5.6 Luna?
It depends on your use case. Claude Fable 5.1 and GPT-5.6 Luna each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 10 challenges so you can judge which fits your needs best.
How much does Claude Fable 5.1 cost compared to GPT-5.6 Luna?
Claude Fable 5.1 costs $10/M input tokens and GPT-5.6 Luna costs $1/M input tokens. GPT-5.6 Luna is $9.00/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.
How can I compare Claude Fable 5.1 and GPT-5.6 Luna on Rival?
This page shows a side-by-side comparison of Claude Fable 5.1 and GPT-5.6 Luna across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.
More comparisons
Against the newest arrivals
- Claude Fable 5.1 vs Ling 3.1 FlashLanded Oct 2026
- GPT-5.6 Luna vs Mistral Large 4Landed Oct 2026
- Claude Fable 5.1 vs GPT-6.1 SolLanded Sep 2026
- GPT-5.6 Luna vs Claude Sonnet 5.5Landed Sep 2026
- Claude Fable 5.1 vs Solar Mini 4Landed Sep 2026
- GPT-5.6 Luna vs Qwen3.8 Max PrimeLanded Sep 2026
- Claude Fable 5.1 vs GLM 5.3 PrimeLanded Sep 2026
- GPT-5.6 Luna vs Qwen3.8 Omni FlashLanded Sep 2026
Same lab, same size, long tail
- Claude Fable 5.1 vs Claude Sonnet 5.5Same lab
- Claude Fable 5.1 vs Claude Opus 5.5Same lab
- GPT-5.6 Luna vs GPT-5.6 Luna ProVersion compare
- GPT-5.6 Luna vs GPT-6.1 SolVersion compare
- GPT-5.6 Luna vs MiMo-V2.6-ProNew provider
- Claude Fable 5.1 vs MiniMax M1Same size
- GPT-5.6 Luna vs MiniMax M2Same size
- Claude Fable 5.1 vs MiniMax M2-herNew provider
