Claude Fable 5.1 vs 
OpenAI Codex Mini
OpenAI Codex Mini is cheaper than Claude Fable 5.1 at $1.5/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
Not enough votes to call it. On the specs, Claude Fable 5.1 has the edge: bigger model tier, newer, bigger context window. OpenAI Codex Mini costs 8.3x less per token.
| Spec | Claude Fable 5.1 | OpenAI Codex Mini |
|---|---|---|
| Input price | $10/M tokens | $1.5/M tokens |
| Output price | $50/M tokens | $6/M tokens |
| Context window | 1.0M tokens | 200K tokens |
| Weights | Closed | — |
| Free API (OpenRouter) | No | No |
| Released | Sep 2026 | May 2025 |
| At 10M a month | $100 | $15.00 |
Input tokens at list price. No caching, no batch discount.
Where to run it
OpenAI Codex Mini
No hosts listed on OpenRouter.
Per million tokens. Prices and uptime via OpenRouter, checked 13 Oct 2026.
Common questions
What is the difference between Claude Fable 5.1 and OpenAI Codex Mini?
Claude Fable 5.1 is developed by Anthropic while OpenAI Codex Mini is developed by OpenAI. Claude Fable 5.1 has a 1.0M token context window vs OpenAI Codex Mini's 200K. You can compare their actual outputs across 3 challenges on Rival to see how they differ in practice.
Which is better, Claude Fable 5.1 or OpenAI Codex Mini?
It depends on your use case. Claude Fable 5.1 and OpenAI Codex Mini each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 3 challenges so you can judge which fits your needs best.
How much does Claude Fable 5.1 cost compared to OpenAI Codex Mini?
Claude Fable 5.1 costs $10/M input tokens and OpenAI Codex Mini costs $1.5/M input tokens. OpenAI Codex Mini is $8.50/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 OpenAI Codex Mini on Rival?
This page shows a side-by-side comparison of Claude Fable 5.1 and OpenAI Codex Mini 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
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