Claude Fable 5.2
anthropic/claude-fable-5.2Claude Fable 5.2 is Anthropic's most capable model for the most demanding technical work, with gains over Fable 5.1 in coding, reasoning, and vision. In prerelease testing it completed otherwise-infeasible...
- Input price
- $8.00USD / 1M tokens
- Output price
- $40.00USD / 1M tokens
- Cache read
- $0.20USD / 1M tokens
- Cache write
- $10.00USD / 1M tokens
- Context window
- 1M
- Max output
- 128K
Specifications
- Input
- Text, image
- Output
- Text
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# The quoted heredoc keeps Unicode and shell metacharacters unchanged.
result=$(curl --fail-with-body --silent \
-X POST "https://api.sandbase.ai/v1/chat/completions" \
-H "Authorization: Bearer $SANDBASE_API_KEY" \
-H "Content-Type: application/json" \
--data-binary @- <<'SANDBASE_JSON'
{
"model": "anthropic/claude-fable-5.2",
"messages": [
{
"role": "user",
"content": "Hello"
}
],
"max_tokens": 2048
}
SANDBASE_JSON
)
printf '%s\n' "$result"Input Schema
8 parameters · 1 required · 7 optional
| Parameter | Type | Required | Description |
|---|---|---|---|
messages | object[] | Required | — |
stop | string[] | Optional | — |
tools | array | Optional | — |
stream | boolean | Optional | Default: false |
max_tokens | integer | Optional | Max: 128000 |
temperature | number | Optional | Min: 0 · Max: 2 · Default: 1 |
tool_choice | string | Optional | — |
response_format | object | Optional | — |
Output Schema
| Field | Type | Description |
|---|---|---|
id | string | Unique identifier for the completion |
object | string | Object type, e.g. "chat.completion" |
model | string | Model used for the completion |
choices | array | List of completion choices |
choices[].message.content | string | Generated text content |
choices[].finish_reason | string | Reason the generation stopped |
usage.prompt_tokens | integer | Number of tokens in the prompt |
usage.completion_tokens | integer | Number of tokens in the completion |
usage.total_tokens | integer | Total tokens used |
Questions
FAQ
How do I call Anthropic Claude Fable 5.2 through SandBase?
Create a SandBase API key, then send requests with the model ID "anthropic/claude-fable-5.2" 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 5.2 cost?
$8 per 1M input tokens and $40 per 1M output tokens, billed per request from your SandBase balance. Discounts, when available, are shown in the pricing on this page.
What is the context window of Anthropic Claude Fable 5.2?
1M tokens of context, with up to 128K output tokens per response.
Which features does Anthropic Claude Fable 5.2 support?
Anthropic Claude Fable 5.2 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 5.2 and the other models in the catalog; you do not need to sign up with Anthropic separately.