Claude Opus 5 vs Claude Fable 5

Anthropic's deepest new model against its writing specialist: raw capability versus a tuned literary voice.

What the numbers say

• Claude Opus 5 is about 2.0x cheaper on output tokens (300 vs 600 credits per 1M).
• Both take the same 1M-token context window.
• Claude Opus 5 is the newer release (July 2026 vs June 2026).

Derived from the live registry Zeplik routes and bills against. Credits: 1 credit = $0.10, computed from the raw provider rate with a 1.20x margin.

Side by side

Try both on Zeplik

The honest answer to most model debates is to run your own prompt on both. Zeplik puts Claude Opus 5 and Claude Fable 5 in the same chat, so you can switch mid-conversation and compare answers on the work you actually do.

Frequently asked questions

What is the difference between Claude Opus 5 and Claude Fable 5?

Claude Opus 5 is about 2.0x cheaper on output tokens (300 vs 600 credits per 1M). Both take the same 1M-token context window. Claude Opus 5 is the newer release (July 2026 vs June 2026).

Is Claude Opus 5 or Claude Fable 5 cheaper?

Claude Opus 5 is cheaper: 300 credits per million output tokens against 600. 1 credit = $0.10, computed from the raw provider rate with a 1.20x margin.

Which has the larger context window, Claude Opus 5 or Claude Fable 5?

Neither: both take 1M tokens.

Can I use both Claude Opus 5 and Claude Fable 5 on Zeplik?

Yes. Zeplik is a multi-model chat, so both sit behind one account and you can switch between them mid-conversation to compare answers on your own prompt.

Do Claude Opus 5 and Claude Fable 5 need a paid plan?

Both need a paid plan (Plus or above). Usage is then billed in credits from your monthly allowance.

Related comparisons

• Claude Opus 5.5 vs Claude Opus 5The rare upgrade with nothing to weigh: Opus 5.5 is newer than Opus 5 and twenty percent cheaper on both input and output, at the same million-token window.
• GPT-5.6 Sol vs Claude Fable 5OpenAI's flagship against Anthropic's writing-and-reasoning specialist from the same release wave.
• GPT-6 Astra vs Claude Opus 5The new top-tier head-to-head: OpenAI's GPT-6 flagship against Anthropic's deepest model, which asks half the price for a comparable million-token window.
• Claude Sonnet 5 vs Claude Fable 5Anthropic's two current-generation flagships, balanced Sonnet against literary Fable.
• GPT-5.6 Sol vs Claude Opus 5The new head-to-head at the very top: OpenAI's flagship against Anthropic's million-token Opus 5 premium tier.
• Claude Opus 5 vs Claude Sonnet 5The Anthropic tier decision one generation back: whether Opus 5's depth and million-token window justify two and a half times Sonnet's price.