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Claude Fable 5.2 API

Anthropic·Vision

Claude 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...

1M Context 128.0K out
Input
Text Image File
Output
Text

Pricing

Cheapest live price, per 1 million tokens.

Input / 1M tokens

$6.0025% off

$8.00 OpenRouter

Output / 1M tokens

$30.0025% off

$40.00 OpenRouter

Capabilities · 10

Vision Reasoning Adjustable reasoning Tool calling JSON mode JSON schema Web search File input PDF Streaming

Specifications

Context window
1M
Max output
128K
Type
Vision
Creator
Anthropic
Live sellers
1
Requests / 24h
—

Estimated monthly cost

30 days at the cheapest live price.

AI Chatbot
1,000 req/day · 2K in · 0.5K out
$810.00/mo
$1,080.00 OpenRouter
Coding Copilot
500 req/day · 8K in · 2K out
$1,620.00/mo
$2,160.00 OpenRouter
AI Agent
100 req/day · 50K in · 5K out
$1,350.00/mo
$1,800.00 OpenRouter

Quick start

OpenAI-compatible — change the base URL and key. Get a key from the dashboard.

from openai import OpenAI

client = OpenAI(
    base_url="https://api.qubax.ai/v1",
    api_key="YOUR_QUBAX_API_KEY",
)

response = client.chat.completions.create(
    model="claude-fable-5.2",
    messages=[{"role": "user", "content": "Hello!"}],
)

print(response.choices[0].message.content)

About Claude Fable 5.2

Claude Fable 5.2 is a multimodal language model developed by Anthropic. It's particularly well-suited for analyzing images, screenshots, and visual content, tackling complex, multi-step reasoning problems, orchestrating tool-using agents that call APIs and external services, grounding responses in real-time web search results, producing structured outputs for reliable data extraction and handling large contexts of up to 1M tokens. Its 1M-token context window means you can pass in entire documents, codebases, or conversation histories without losing context. It can write up to 128K tokens in a single response.

As of Nov 9, 2026, Claude Fable 5.2 costs $6.00 per 1M input tokens and $30.00 per 1M output tokens on Qubax, versus $8.00 / $40.00 on OpenRouter (25% less on input). A typical 1,000 chat requests (2K tokens in, 500 out) come to about $27.00. Pay with USDC, USDT, BTC, ETH or 350+ other coins — no credit card required.

Visual Analysis
Analyze images, screenshots, diagrams, and visual content
Complex Reasoning
Multi-step problem solving, math, and logical analysis
Function Calling
Build agents and tool-using applications
Long Documents
Process entire codebases, books, or lengthy conversations
Chat & Conversation
Build AI chatbots and conversational assistants

Similar-priced alternatives

Frequently asked questions

How much does the Claude Fable 5.2 API cost?

On Qubax, Claude Fable 5.2 costs $6.00 per 1M input tokens and $30.00 per 1M output tokens. This is 25% cheaper than OpenRouter's price of $8.00 per 1M input tokens.

Is the Claude Fable 5.2 API compatible with OpenAI?

Yes. Qubax provides an OpenAI-compatible API. You can use Claude Fable 5.2 as a drop-in replacement by changing your base URL to https://api.qubax.ai/v1 and using your Qubax API key. It works with Cline, Cursor, OpenCode, Hermes Agent, and any tool that supports OpenAI APIs.

Why is Claude Fable 5.2 cheaper on Qubax than OpenRouter?

Qubax sources AI inference from an open compute marketplace on the Base blockchain where GPU providers compete on price. We pass the savings to you — 25% cheaper than OpenRouter's price for Claude Fable 5.2.

How do I pay for Claude Fable 5.2 API usage?

Qubax uses prepaid crypto credits. Top up with USDC, USDT, BTC, ETH, SOL or 350+ other coins and your balance is deducted as you use the API. No credit card or KYC required.

What is the context window of Claude Fable 5.2?

Claude Fable 5.2 supports a context window of 1M tokens, allowing you to process large documents, codebases, or long conversations in a single request.

What can I build with Claude Fable 5.2?

You can use Claude Fable 5.2 to analyze images and visual content, tackle complex multi-step reasoning tasks, build autonomous agents that call external tools and APIs, answer questions with real-time web search, generate structured JSON output for data pipelines and process long documents and entire codebases. Because it's served through Qubax's OpenAI-compatible API, integration into existing apps, agents, or workflows takes just a few lines of code.

How fast and reliable is Claude Fable 5.2 on Qubax?

Responses stream token by token. Latency depends on the provider and prompt length.

Claude Fable 5.2 vs GPT-5.4 Image 2: which should I choose?

Claude Fable 5.2 by Anthropic and GPT-5.4 Image 2 by OpenAI are both strong models in a similar price tier. Claude Fable 5.2 excels at complex reasoning and supports vision/image inputs. GPT-5.4 Image 2 comes from a different lab and may have different strengths depending on your workload. On Qubax, Claude Fable 5.2 starts at $6.00/1M input tokens versus GPT-5.4 Image 2's $6.60/1M — making Claude Fable 5.2 the more cost-effective option for high-volume workloads. Both are available on Qubax with crypto payments and OpenAI-compatible APIs, so you can try each and switch freely.

Can I use Claude Fable 5.2 for commercial projects?

Yes. Claude Fable 5.2 on Qubax can be used for commercial purposes. You own the outputs you generate. Qubax provides the API infrastructure — you bring your use case.

Why use Claude Fable 5.2 on Qubax?

25% cheaper

Providers compete on price — you get the cheapest healthy seller.

Pay with crypto

350+ coins (BTC, ETH, SOL, USDT, USDC). No card, no KYC.

OpenAI & Anthropic compatible

Drop-in base URL. Works with Cline, Cursor, Claude Code, OpenAI and Anthropic SDKs.

Get started free →

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Claude Fable 5.2

$6.00 in · $30.00 out

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