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ModelRover
Anthropic

Claude Fable 5.2

Hotanthropic/claude-fable-5-2
DocsGet API key

Anthropic's long-horizon flagship model with a 1M-token context window and 128K max output, always-on adaptive thinking. Site price is 80% of Anthropic's standard list price.

Capabilities
-
-
Context length
1M
Tokens
Max output tokens
128K
Tokens
Type
Chat
Anthropic
Release date
2026-11-09
Model brand

Playground

Up to 50 messages are kept on this page; only the last 10 are sent as context, and refreshing clears them

Pricing

Pricing breakdown
Usage-based pricing, broken down by billing item at your current rates.
20% off

Input tokens

Standard rate
8 credits / 1M6.4 credits / 1M

Output tokens

Standard rate
40 credits / 1M32 credits / 1M

Cache read tokens

Standard rate
0.2 credits / 1M0.16 credits / 1M

Cache write tokens (5 min)

Standard rate
10 credits / 1M8 credits / 1M

Cache write tokens (1 hour)

Standard rate
16 credits / 1M12.8 credits / 1M

Billing items are additive. Only one matching price tier applies to each item. Each request is calculated exactly from actual usage, and the total is rounded up once to the nearest 0.000001 credits.

API

cURL example
POST/v1/messages
SynchronousAnthropic Messages
curl "https://api.modelrover.ai/v1/messages" \  -X POST \  -H "x-api-key: $API_KEY" \  -H "Content-Type: application/json" \  -d '{  "model": "anthropic/claude-fable-5-2",  "max_tokens": 256,  "messages": [    {      "role": "user",      "content": "Explain model gateways in one sentence."    }  ]}'

Set your API_KEY environment variable before running. Keep your key server-side.

API documentation

Uptime