Call Claude Fable 5.2 on ModelFold with model id claude-fable-5-2. The same id works for the web playground, POST /v1/chat/completions, and the Claude Messages API.

What this model is for

Context window

1,000,000 tokens of context and up to 128,000 tokens of output, for long conversations, documents, and code.

Text, images, and files

Text in and text out. Image and file inputs are accepted on the same model id.

Tools and thinking

Native Messages requests can stream, call tools, and return thinking. An unknown model id is rejected and is not replaced with another model.

Pricing

Billing follows token usage. At current prices, input is 768 credits per 1M tokens (about $3.84) and output is 3840 credits per 1M tokens (about $19.2). Final charges follow actual token usage. Failed calls are not charged.

Real responses

These two replies were returned by claude-fable-5-2 on 2026-11-12. Prompt: In one sentence, what does a tide table tell a sailor? Reply: A tide table tells a sailor the predicted times and heights of high and low tides at a given location, so they can know when the water will be deep enough to navigate safely. Prompt: Give a two-item packing list for a rainy city walk. No extra commentary. Reply: - Compact umbrella - Waterproof jacket

FAQ

What model id do I send?⌄

Send model claude-fable-5-2 to POST https://modelfold.ai/v1/chat/completions with Authorization: Bearer YOUR_API_KEY. stream: true returns server-sent events. Claude Code uses the same id on POST https://modelfold.ai/anthropic/v1/messages.

Does it support tools?⌄

Yes. A Messages request with an add tool asked the model to add 17 and 19. It called add with a=17 and b=19 and did not answer with the sum itself.

Rate card

Input	768 credits 1M tokens≈ $3.84
Output	3840 credits 1M tokens≈ $19.20

Billed per token: input and output are priced separately, and thinking tokens count as output. The Playground charges exactly the same way.

Read API docs →AI Agents · Claude Code / Cursor / Trae →

Quick start

POST/v1/chat/completions

curl https://modelfold.ai/v1/chat/completions \
  -H "Authorization: Bearer $MODELFOLD_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"claude-fable-5-2","messages":[{"role":"user","content":"Hello"}]}'