anthropic/claude-fable-5
1M context · $4.00 / M input tokens · $20.00 / M output tokens
Claude Fable 5 has been officially discontinued by Anthropic and is no longer available for new usage. This page is kept for reference only.
Pricing
Pay-per-use
No upfront costs, pay only for what you use
API Usage
API Access Guide
Code examples
Use the OurToken API endpoint for this model. The examples below use direct HTTP requests and the recommended endpoint for the model family.
curl https://api.ourtoken.ai/v1/messages \
-H "Content-Type: application/json" \
-H "Authorization: Bearer YOUR_API_KEY" \
-d '{
"model": "claude-fable-5",
"messages": [
{
"role": "user",
"content": "Hello!"
}
],
"max_tokens": 256
}'Messages API Reference
Create a Claude Messages-compatible response through OurToken. This format uses a messages array, max_tokens, optional system prompts, tools, and thinking settings.
Authorization
| Content-Type | application/json |
| Authorization | Bearer YOUR_API_KEY |
Request Body
| Field | Type | Required | Description |
|---|---|---|---|
| model | string | Required | Model ID to call. |
| messages | array<object> | Required | Conversation messages sent to the model. |
| system | string | array<object> | Optional | Optional system prompt. |
| max_tokens | integer | Required | Maximum number of output tokens. |
| temperature | number | Optional | Sampling temperature. |
| top_p | number | Optional | Nucleus sampling parameter. |
| top_k | integer | Optional | Top-k sampling parameter. |
| stream | boolean | Optional | Whether to return a streaming response. |
| stop_sequences | array<string> | Optional | Sequences that stop generation. |
| tools | array<object> | Optional | Tools available to the model. |
| tool_choice | object | Optional | Controls how the model selects tools. |
| thinking | object | Optional | Thinking configuration for supported Claude models. |
| metadata | object | Optional | Optional request metadata. |
Response Body
| Field | Type | Required | Description |
|---|---|---|---|
| id | string | Required | Unique message identifier. |
| type | "message" | Required | Object type returned by the Messages API. |
| role | "assistant" | Required | Role of the returned message. |
| content | array<object> | Required | Array of content blocks returned by the model. |
| content[].text | string | Optional | Text inside a returned content block. |
| model | string | Required | Model that produced the response. |
| stop_reason | string | Optional | Reason generation stopped. |
| usage | object | Optional | Token usage information for the message. |
| usage.input_tokens | integer | Optional | Input token count. |
| usage.output_tokens | integer | Optional | Output token count. |
| usage.cache_creation_input_tokens | integer | Optional | Tokens written to prompt cache. |
| usage.cache_read_input_tokens | integer | Optional | Tokens read from prompt cache. |
Model Introduction
Anthropic claude-fable-5
Claude Fable 5 has been officially discontinued by Anthropic and is no longer available for new usage. This page is kept for reference only.
Claude Fable 5 is described in the provided Anthropic material as a Mythos-class model made safe for general use, with strong capabilities for software engineering, knowledge work, vision, scientific research, and long-running tasks. On OurToken, teams can evaluate claude-fable-5 with clear API access, visible token pricing, cache pricing references, and a practical workflow for testing before production rollout.
Why It Looks Great
- High-capability Anthropic model route for complex reasoning, software engineering, knowledge work, and vision tasks.
- Current project data lists a 1M context window and up to 128K output tokens for long-horizon workloads.
- OurToken displays the route at 40% of official price for input, output, cache write, and cache read token categories.
- Developers can test Claude Code-style workflows, repository analysis, migration planning, and agentic coding prompts through one API path.
- The provided launch material notes that some protected-topic requests may fall back to Claude Opus 4.8.
Key Features
- Context Window: 1000000 tokens
- Max Output: 128000 tokens
- Vision: Supported
- Function Calling: Supported
- Input: Text, Image
- Output: Text
- OurToken Price: 40% of official pricing
Specifications
Claude Fable 5 API features for production teams
Compare pricing, API access, and Claude Code Fable 5 workflows for teams evaluating Anthropic Fable 5 through one OurToken model page.
Unified API Access
Use claude-fable-5 through OurToken when you need a clear Claude Fable 5 API route, visible model pricing, and a developer path that fits existing application tests before production rollout without searching across separate provider pages.
Official Price Ratio
The page shows OurToken at 40% of official pricing, with official references for input, output, cache write, and cache read tokens. That helps buyers compare the Fable 5 model cost before assigning high-volume coding or analysis traffic.
Claude Code Workflows
Teams searching Claude Code Fable 5 can evaluate how the route fits long coding sessions, repository analysis, migration planning, and agentic developer workflows while keeping model ID, API access, and price details in one place.
Anthropic Model Context
For readers asking what is Claude Fable, the page positions Anthropic Fable 5 as a high-capability Claude model for complex reasoning, knowledge work, software engineering, and vision use cases described in the provided launch material.
Cache Pricing Clarity
The pricing section separates input, output, cache write, and cache read costs so teams can estimate prompt caching behavior instead of treating every request as a flat token bill. This is useful for long-context Claude Fable 5 API workloads.
Vision Ready Route
The provided competitor material describes Fable 5 Anthropic workflows with text and image input, including complex visual reasoning tasks. OurToken can present that capability beside API setup notes, pricing references, and practical integration guidance.
How to Use Claude Fable 5 API on OurToken
Create an API key, select claude-fable-5, compare pricing, and test Claude Code Fable 5 workflows through the OurToken unified API.
Create API Key
Sign in to OurToken and create an API key from your dashboard. Keep the key available for local tests, staging requests, and production configuration so your Claude Fable 5 API integration can move from a quick prompt check to repeatable application calls.
01Choose Model ID
Use claude-fable-5 as the model value in your request body. This keeps Anthropic Fable 5 routing explicit across scripts, backend services, and Claude Code Fable experiments where developers compare outputs against other Claude or OpenAI routes.
02Call Unified API
Send requests through the OurToken API endpoint with your bearer token, model ID, messages, and output settings. Start with a small prompt, then expand into coding, document analysis, or vision tasks after confirming the response shape your application expects.
03Compare Token Prices
Review input, output, cache write, and cache read pricing before you scale traffic. OurToken lists the Fable 5 model at 40% of official pricing, which helps teams estimate long-context sessions and prompt caching behavior more clearly.
04Test Coding Workflows
Run repository explanations, migration plans, debugging tasks, and agent-style coding prompts to evaluate Claude Code Fable 5 behavior. Track whether the model follows instructions, handles long context, and returns implementation details your engineering team can verify.
05Monitor Cost Quality
After initial tests, monitor request quality, latency, token usage, and spend by model. Teams comparing what is Fable 5 Claude can use these results to decide when the route fits production workloads and when another model is more appropriate.
06Claude Fable 5 API FAQ
Answers about Claude Fable 5 API access, pricing, Claude Code Fable 5 workflows, Anthropic Fable 5 context, cache costs, and fallback behavior.
