Claude Fable 5
anthropic/claude-fable-5Claude Fable 5 is a Mythos-class model from Anthropic, built for autonomous knowledge work and coding. It supports text, image, and file inputs with text output, with reasoning support and a 1M-token context window. It is suited for long-running, complex, and asynchronous tasks that previously required frequent human check-ins.
- Input price
- $8.50
$10.00USD / 1M tokens - Output price
- $42.50
$50.00USD / 1M tokens - Cache read
- $0.85
$1.00USD / 1M tokens - Cache write
- $10.63
$12.50USD / 1M tokens - Context window
- 1M
- Max output
- 128K
Specifications
- Input
- Text, image
- Output
- Text
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# The quoted heredoc keeps Unicode and shell metacharacters unchanged.
result=$(curl --fail-with-body --silent \
-X POST "https://api.sandbase.ai/v1/chat/completions" \
-H "Authorization: Bearer $SANDBASE_API_KEY" \
-H "Content-Type: application/json" \
--data-binary @- <<'SANDBASE_JSON'
{
"model": "anthropic/claude-fable-5",
"messages": [
{
"role": "user",
"content": "Hello"
}
],
"max_tokens": 2048
}
SANDBASE_JSON
)
printf '%s\n' "$result"Questions
FAQ
How do I call Anthropic Claude Fable 5 through SandBase?
Create a SandBase API key, then send requests with the model ID "anthropic/claude-fable-5" to Chat Completions API (/v1/chat/completions) or Messages API (/v1/messages) at https://api.sandbase.ai. The request examples on this page show the exact payload.
How much does Anthropic Claude Fable 5 cost?
$8.50 per 1M input tokens and $42.50 per 1M output tokens with the current 15% discount (list price $10 / $50), billed per request from your SandBase balance.
What is the context window of Anthropic Claude Fable 5?
1M tokens of context, with up to 128K output tokens per response.
Which features does Anthropic Claude Fable 5 support?
Anthropic Claude Fable 5 supports vision (image input), reasoning, function calling, structured output. See Specifications above for the full list.
Do I need a separate Anthropic account?
No. One SandBase API key and balance gives you access to Anthropic Claude Fable 5 and the other models in the catalog; you do not need to sign up with Anthropic separately.