claude-fable-5 API
claude-fable-5 is Anthropic's most capable widely released model, built for long-running agent work. On CaMeL Hub you call it with any OpenAI SDK by setting base_url to https://api.camel-hub.com/v1 — $10 per 1M input tokens, $50 per 1M output tokens. It ships with a 1M-token context window, up to 128K output tokens, and adaptive reasoning that is always on, so the model decides how deeply to think on each request without you managing a thinking budget.
Pricing
| per 1M input tokens | per 1M output tokens | |
|---|---|---|
| CaMeL Hub | $10.00 | $50.00 |
| Provider list price | $10.00 | $50.00 |
Prices are the public default-group rate in USD per 1M tokens; input and output are billed separately. · Provider list price · verified 2026-07-11
Specifications
- Provider
- Anthropic
- Context window
- 1000000 tokens
- Max output
- 128000 tokens
- Capabilities
- streaming, vision, function-calling, reasoning
- Endpoints
- anthropic, openai
What it is good for
- Long-running autonomous coding agents that plan, edit, and verify changes across a large repository over many hours
- Whole-corpus analysis — contracts, filings, or research collections loaded into the 1M-token context in a single request
- Multi-step tool orchestration where the agent must diagnose failed calls, re-plan, and keep state consistent
- High-stakes reasoning tasks such as architecture reviews, incident postmortems, and math-heavy analysis
- Producing very long structured outputs — full reports, specs, or multi-file code — in one pass with up to 128K output tokens
- Agent loops that read screenshots or diagrams, using vision input to ground decisions in UI or chart state
Quickstart
OpenAI-compatible: set base_url to https://api.camel-hub.com/v1 and use your CaMeL Hub API key. No SDK changes needed.
cURL
curl https://api.camel-hub.com/v1/chat/completions \
-H "Authorization: Bearer $CAMEL_HUB_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "claude-fable-5",
"messages": [{"role": "user", "content": "Hello!"}]
}'Python
from openai import OpenAI
client = OpenAI(
api_key="$CAMEL_HUB_KEY",
base_url="https://api.camel-hub.com/v1", # <-- the only change vs. the OpenAI default
)
resp = client.chat.completions.create(
model="claude-fable-5",
messages=[{"role": "user", "content": "Hello!"}],
)
print(resp.choices[0].message.content)Node.js
import OpenAI from "openai";
const client = new OpenAI({
apiKey: process.env.CAMEL_HUB_KEY,
baseURL: "https://api.camel-hub.com/v1", // <-- the only change vs. the OpenAI default
});
const resp = await client.chat.completions.create({
model: "claude-fable-5",
messages: [{ role: "user", content: "Hello!" }],
});
console.log(resp.choices[0].message.content);Get an API key Browse integration guides
Frequently asked questions
How is claude-fable-5 billed on CaMeL Hub?
Per token, with input and output metered separately: $10 per 1M input tokens and $50 per 1M output tokens. Streaming responses are billed at the same rates as non-streaming — you pay for tokens, not for connection time.
Does claude-fable-5 support streaming, function calling, and image input?
Yes to all three. You can stream tokens as they generate, define tools/functions for the model to call, and send images (screenshots, diagrams, photos) as input. Reasoning is also built in — adaptive thinking is always on for this model.
What are the context window and maximum output length?
The context window is 1M tokens and the maximum output is 128K tokens per request, per Anthropic's official model documentation. Note that claude-fable-5 uses the tokenizer introduced with Claude Opus 4.7, so identical text tokenizes to roughly 30% more tokens than on older Claude models.
Do I need Anthropic-specific code to call it?
No. CaMeL Hub serves claude-fable-5 through an OpenAI-compatible API, so any OpenAI SDK works — set base_url to https://api.camel-hub.com/v1 and pass your CaMeL Hub key. If your tooling speaks the native Anthropic Messages format instead, that endpoint is available too.
How do I get started?
Create an account at https://api.camel-hub.com/console, generate an API key, then point your existing OpenAI or Anthropic SDK at https://api.camel-hub.com/v1 with model "claude-fable-5". Top up by card, Alipay, or WeChat Pay, or pick a subscription plan.