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Anthropic

Claude Fable 5.2 API

Anthropic model for demanding reasoning, coding and long-running agent workflows, with a 1M-token context window and always-on adaptive thinking.

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Starting at

$3.6

input price per 1M tokens

4 token price options

Claude Fable 5.2 playground

Input

openai
2048
1.0
1.00

Input

$3.6 / 1M

Output

$18 / 1M

Output

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Ask Claude Fable 5.2 anything. Messages are sent directly to the API and charged by token usage.

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Claude Fable 5.2 API pricing

OptionPrice per 1M tokens
input$3.6
output$18
cacheRead$0.09
cacheWrite$4.5

Quick start

Full API reference →
1curl -X POST https://api.api-stock.com/api/v1/chat/completions \
2  -H "Authorization: Bearer $API_STOCK_KEY" \
3  -H "Content-Type: application/json" \
4  -d '{
5    "model": "claude-fable-5.2",
6    "messages": [
7      {
8        "role": "user",
9        "content": "A cinematic shot of a city at dusk"
10      }
11    ]
12  }'

Frequently asked questions

How much does Claude Fable 5.2 cost?

Claude Fable 5.2 starts at $3.6 per 1M input tokens on API Stock. The final charge depends on the selected settings.

When was Claude Fable 5.2 released?

Claude Fable 5.2 was released on November 9, 2026 and is available through API Stock.

How do I get an API key for Claude Fable 5.2?

Create an account and API key on API Stock, then fund your balance. The same key works with Claude Fable 5.2 and other catalog models.

How do I call the Claude Fable 5.2 API?

Send a POST request to https://api.api-stock.com/api/v1/chat/completions with your API key and the model "claude-fable-5.2", using the openai-compatible request format shown in the quick start above.

What happens if a Claude Fable 5.2 request fails?

API Stock automatically retries the request on a reserve provider. If every provider fails, the charge is refunded to your balance.

Can I use Claude Fable 5.2 with the same API key as other models?

Yes. Use your API Stock API key and balance for Claude Fable 5.2 and other catalog models.

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