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  5. Claude Fable 5.1vsSolar Mini 4
Updated Sep 2026

Claude Fable 5.1vsSolar Mini 4

Solar Mini 4 is cheaper than Claude Fable 5.1 at $0.05/M vs $10/M input tokens.

Claude Fable 5.1 and Solar Mini 4 compared across 2 shared prompts
SpecClaude Fable 5.1Solar Mini 4
Input price$10/M tokens$0.05/M tokens
Output price$50/M tokens$0.2/M tokens
Context window1.0M tokens524K tokens
WeightsClosed—
Free API (OpenRouter)NoNo
ReleasedSep 2026Sep 2026
Our Verdict
Claude Fable 5.1
Claude Fable 5.1
Solar Mini 4
Solar Mini 4Runner-up

Not enough votes to call it. On the specs, Claude Fable 5.1 has the edge: bigger model tier, bigger context window, major provider backing.

Solar Mini 4 costs 250x less per token.

Slight edge

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Claude Fable 5.1
Input
$10.00
Output
$50.00
Solar Mini 4
Input
$0.05
200× cheaper
Output
$0.20
250× cheaper

Solar Mini 4 is cheaper on both: 200× input, 250× output.

Where to run it

5 hosts

Claude Fable 5.14 hosts
HostInOutContextUptime
Amazon Bedrock$10.00 in·$50.00 out·1M—Anthropic$10.00 in·$50.00 out·1M·99.9% upAzure AI Foundry$10.00 in·$50.00 out·1M·99.6% upGoogle Vertex AI$10.00 in·$50.00 out·1M·99.9% up
Solar Mini 41 host
HostInOutContextUptime
UUpstage$0.05 in·$0.20 out·524k·100% up

Per million tokens. Prices and uptime via OpenRouter, checked 25 Sep 2026.

Research

What we learned reading every model

FAQ

Common questions

Claude Fable 5.1 is developed by Anthropic while Solar Mini 4 is developed by Upstage. Claude Fable 5.1 has a 1.0M token context window vs Solar Mini 4's 524K. You can compare their actual outputs across 2 challenges on Rival to see how they differ in practice.

It depends on your use case. Claude Fable 5.1 and Solar Mini 4 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 2 challenges so you can judge which fits your needs best.

Claude Fable 5.1 costs $10/M input tokens and Solar Mini 4 costs $0.05/M input tokens. Solar Mini 4 is $9.95/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

This page shows a side-by-side comparison of Claude Fable 5.1 and Solar Mini 4 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.

Keep exploring

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Model pages

Claude Fable 5.1 logo
Claude Fable 5.110 outputs, specs and price
Solar Mini 4 logo
Solar Mini 419 outputs, specs and price
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