Claude Fable 5
Access Claude Fable 5 through one API key. Anthropic's creative writing flagship.
Anthropic's creative-first model. Claude Fable 5 is tuned for vivid long-form writing, storytelling, screenwriting, and stylistic range, with a 1M token context window.
No credit card required. Takes 30 seconds.
2,400+
Developers
1.2M+
API calls served
100+
Endpoints
$0.01
Per call
Yep, that's it.
Try it live
Send a message and see Claude Fable 5 respond in real time.
Maximum tokens in the response.
Real-time tokens
Context Window
1M tokens
Max Output
32K tokens
Input Price
$14.00 / 1M tokens
Output Price
$70.00 / 1M tokens
Strengths
Tuned by Anthropic for vivid long-form prose, with up to 32K output tokens per call so you can generate full chapters, scripts, or essays in a single completion without chunking.
A 1,000,000-token context window holds an entire manuscript, style bible, and prior drafts at once, letting the model keep voice and plot consistent across very long projects.
Optimized for stylistic control: it holds a consistent narrative voice, switches registers on request, and matches reference samples more closely than general-purpose Claude models.
Trained for storytelling structure — scene beats, dialogue, and screenplay formatting — making it suited to fiction, screenwriting, and game narrative over factual Q&A.
Quick start
Copy this snippet and start making calls with Claude Fable 5.
const res = await fetch('https://api.yepapi.com/v1/ai/chat', {
method: 'POST',
headers: {
'x-api-key': 'YOUR_API_KEY',
'Content-Type': 'application/json',
},
body: JSON.stringify({
"model": "anthropic/claude-fable-5",
"messages": [
{
"role": "user",
"content": "Explain API gateways in 2 sentences."
}
],
"maxTokens": 256
}),
});
const { data } = await res.json();
console.log(data.message.content);Why use Claude Fable 5 through YepAPI?
Claude Fable 5 API — pricing, context window & access
Claude Fable 5 is Anthropic's creative-first model, tuned for long-form writing, storytelling, and screenwriting rather than analytical or agentic work. It pairs a 1M-token context window with up to 32,000 output tokens per request, so you can draft and revise long narrative pieces in one pass.
Through YepAPI you call Claude Fable 5 over an OpenAI-compatible endpoint with a single API key — the same key that also reaches other Claude models, Gemini, Grok, Qwen, and Perplexity Sonar, plus SEO, SERP, and web-scraping endpoints.
What is Claude Fable 5?
Claude Fable 5 is Anthropic's creative-writing-oriented model. Where the Opus and Sonnet lines target reasoning and coding, Fable 5 is tuned for vivid prose, stylistic range, and narrative structure. It accepts up to 1,000,000 tokens of context and returns up to 32,000 output tokens, enough to hold a full manuscript plus a style guide while generating long, coherent passages. It is built for fiction, screenwriting, marketing copy, and any task where voice, tone, and continuity matter more than tool use or step-by-step math.
Build with Claude Fable 5 via YepAPI
Point your client at YepAPI's OpenAI-compatible /v1/ai/chat endpoint and set the model string to claude-fable-5. If you already use the OpenAI SDK, only the base URL and model name change. Switching between Fable 5 and any other model — say, dropping to Sonnet for an outline or Sonar for a fact check — is a one-string edit, with no new SDK or auth flow. One key covers every model on the platform.
Claude Fable 5 API pricing — $14.00 / $70.00 per 1M tokens
Claude Fable 5 costs $14.00 per 1M input tokens and $70.00 per 1M output tokens through YepAPI. Because creative work is output-heavy, the output rate dominates your bill — a 32K-token chapter draft costs roughly $2.24 in generation. Usage is metered per token with no minimums, so you pay only for the prose you actually generate.
Claude Fable 5 for fiction and screenwriting
Fable 5 shines on long-form creative tasks: novels, short fiction, screenplays, episodic scripts, and game dialogue. The 1M-token window lets you feed an entire series bible plus earlier chapters so the model preserves character voice and continuity. The 32K output ceiling means full scenes or chapters come back in one call. For writers who need stylistic consistency across a long project, it is purpose-built.
Try Claude Fable 5 free
New YepAPI accounts get $5 in free credit with no card required. That covers thousands of input tokens and a few full-length drafts, enough to test Fable 5's voice and continuity on your own material before you commit to paid usage.
Start generating in 30 seconds
$5 free credit on signup. No credit card required. Pay per call.
What developers say
“Switched from SerpAPI and cut our SERP costs by 80%. Same data quality, way simpler billing.”
“One API key for AI models, SERP data, and web scraping. Saved us from managing 4 separate providers.”
“The $5 free credit let us prototype our entire rank tracking feature before committing. No other API does that.”
Frequently asked questions
Anthropic's creative-first model. Claude Fable 5 is tuned for vivid long-form writing, storytelling, screenwriting, and stylistic range, with a 1M token context window.
Input tokens cost $14.00 per 1M tokens and output tokens cost $70.00 per 1M tokens through YepAPI. No monthly minimums — you only pay for what you use.
Sign up for a free API key, then send requests to the /v1/ai/chat endpoint.
Claude Fable 5 supports a 1M token context window with up to 32K output tokens per request.
Ready to use Claude Fable 5?
$5 free credit on signup. No credit card required. Pay per call.
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