Claude Fable 5.1 vs 
Step 5 Preview
Step 5 Preview 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.
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Which answer wins?
Price and specs
| Spec | Claude Fable 5.1 | Step 5 Preview |
|---|---|---|
| Input price | $10/M tokens | $1/M tokens |
| Output price | $50/M tokens | $2.7/M tokens |
| Context window | 1.0M tokens | 1.0M tokens |
| Weights | Closed | — |
| Free API (OpenRouter) | No | No |
| Released | Sep 2026 | Oct 2026 |
| At 10M a month | $100 | $10.00 |
Input tokens at list price. No caching, no batch discount.
Where to run it
Step 5 Preview1 host
Per million tokens. Prices and uptime via OpenRouter, checked 10 Oct 2026.
Common questions
What is the difference between Claude Fable 5.1 and Step 5 Preview?
Claude Fable 5.1 is developed by Anthropic while Step 5 Preview is developed by StepFun. Claude Fable 5.1 has a 1.0M token context window vs Step 5 Preview's 1.0M. 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 Step 5 Preview?
It depends on your use case. Claude Fable 5.1 and Step 5 Preview 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 Step 5 Preview?
Claude Fable 5.1 costs $10/M input tokens and Step 5 Preview costs $1/M input tokens. Step 5 Preview 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 Step 5 Preview on Rival?
This page shows a side-by-side comparison of Claude Fable 5.1 and Step 5 Preview 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.
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