Claude Sonnet 5 vs Claude Fable 5
Anthropic's two current-generation flagships, balanced Sonnet against literary Fable.
Figures as of , read live from the model registry Zeplik bills against.
What the numbers say
- Claude Sonnet 5 is about 5.0x cheaper on output tokens (120 vs 600 credits per 1M).
- Both take the same 1M-token context window.
- Claude Sonnet 5 is the newer release (June 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
Claude Sonnet 5
Anthropic
Sonnet 5 is Anthropic's most capable Sonnet-class model, with frontier performance across coding, agents, and professional work.
- Provider
- Anthropic
- Context window
- 1M tokens
- Input price
- 24.0 credits / 1M tokens ($2.00 raw)
- Output price
- 120 credits / 1M tokens ($10.00 raw)
- Vision (image input)
- Yes
- Tool calling
- Yes
- Extended reasoning
- No
Best for
- Hard problems where answer quality matters more than cost: strategy, analysis, difficult writing
- Very long documents and codebases: a 1M-token window fits entire books or repositories in one conversation
- Working with images: screenshots, charts, photos and scanned documents alongside text
- Tool use and agents: reliably calls functions, so it can search, run skills and drive workflows
Claude Fable 5
Anthropic
Claude Fable 5 is a Mythos-class model from Anthropic, built for autonomous knowledge work and coding.
- Provider
- Anthropic
- Context window
- 1M tokens
- Input price
- 120 credits / 1M tokens ($10.00 raw)
- Output price
- 600 credits / 1M tokens ($50.00 raw)
- Vision (image input)
- Yes
- Tool calling
- Yes
- Extended reasoning
- No
Best for
- Hard problems where answer quality matters more than cost: strategy, analysis, difficult writing
- Very long documents and codebases: a 1M-token window fits entire books or repositories in one conversation
- Working with images: screenshots, charts, photos and scanned documents alongside text
- Tool use and agents: reliably calls functions, so it can search, run skills and drive workflows
Try both on Zeplik
The honest answer to most model debates is to run your own prompt on both. Zeplik puts Claude Sonnet 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 Sonnet 5 and Claude Fable 5?
- Claude Sonnet 5 is about 5.0x cheaper on output tokens (120 vs 600 credits per 1M). Both take the same 1M-token context window. Claude Sonnet 5 is the newer release (June 2026 vs June 2026).
- Is Claude Sonnet 5 or Claude Fable 5 cheaper?
- Claude Sonnet 5 is cheaper: 120 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 Sonnet 5 or Claude Fable 5?
- Neither: both take 1M tokens.
- Can I use both Claude Sonnet 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 Sonnet 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 Sonnet 5The current Anthropic tier decision: Opus 5.5 costs twice Sonnet 5 for an identical million-token window, so the question is entirely about depth per turn.
- GPT-5.6 Sol vs Claude Fable 5OpenAI's flagship against Anthropic's writing-and-reasoning specialist from the same release wave.
- GPT-6 Sol vs Claude Sonnet 5Priced identically at $2 in and $10 out, five percent apart on context: the closest like-for-like comparison in the catalogue, and a genuine toss-up on price alone.
- Claude Opus 5 vs Claude Fable 5Anthropic's deepest new model against its writing specialist: raw capability versus a tuned literary voice.
- Grok 4.7 vs Claude Sonnet 5Grok 4.7 answers for roughly half Sonnet 5's output price; Sonnet 5 answers with twice the context. The trade is unusually clean.
- GPT-6 Astra vs Claude Sonnet 5Frontier against workhorse: whether GPT-6 Astra earns five times Sonnet 5's price on the work you actually send it.
Explore Zeplik
- 468 AI skillsReady-to-run expert methods that run on Claude Sonnet 5, Claude Fable 5 or any other model.
- 997 integrationsConnect Gmail, Slack, GitHub, Notion and hundreds more so the assistant can work in your apps.
- Simple pricingPlus, Pro and Max plans with a monthly credit allowance that works across every model.