11 Jun 2026 · Agentbot Team

Claude Fable 5 × OpenClaw Agentbot — Frontier Intelligence for Autonomous Agents

Anthropic just shipped Claude Fable 5 — their most capable model, built for days-long autonomous tasks that previous models couldn't sustain. Agentbot users can access it now via OpenRouter.

What is Claude Fable 5?

Claude Fable 5 is Anthropic's 5th-generation frontier model. It's designed for ambitious, long-running projects — the kind of work that takes days, not minutes.

Key capabilities:

• Days-long autonomy — plans across stages, delegates to sub-agents, checks its own work
• Frontier coding — large migrations, complex implementations, multi-day sessions
• Vision — understands diagrams, charts, tables in PDFs and files
• Self-verification — writes its own tests, evaluates outputs against goals

How to Use Claude Fable 5 on Agentbot

Agentbot routes all AI requests through OpenRouter, which means you get access to 500+ models including Claude Fable 5 — no separate API keys needed.

Step 1: Upgrade to Label Plan

Claude Fable 5 requires the Label plan ($49/mo) due to its frontier pricing ($10/M input, $50/M output tokens). This covers the full Agentbot platform plus access to Fable, DeepSeek R1, and other premium models.

Step 2: Select Claude Fable 5

During onboarding or in your agent settings, select Claude Fable 5from the model dropdown. It's now listed alongside MiMo V2.5 Pro, Claude Sonnet 4.5, and DeepSeek R1.

Step 3: Deploy

Your agent will run on Claude Fable 5 via OpenRouter. The model handles tool calling, memory, and multi-step workflows natively — no configuration changes needed.

Why This Matters for Agentbot

Agentbot is built for autonomous agents that run 24/7. Claude Fable 5's ability to sustain complex work across days aligns perfectly with our architecture:

• Long-running tasks — agents can tackle multi-day projects without losing context
• Self-correction — Fable writes tests and verifies its own outputs
• Vision integration — agents can analyze screenshots, diagrams, and documents
• Cost efficiency — 90% input token discount with prompt caching

Pricing

Claude Fable 5 via OpenRouter:

• Input: $10 per million tokens
• Output: $50 per million tokens
• Prompt caching: 90% discount on cached input tokens

For most Agentbot workloads, prompt caching keeps costs manageable. The Label plan includes generous token allowances to get started.

What Customers Are Saying

“Claude Fable 5 is the state of the art model on CursorBench. It's opened up a class of long-horizon problems that were out of reach for earlier models.”

“Claude Fable 5 compresses months of engineering into days. In our 50-million-line Ruby codebase, it did in a day what would've taken us more than two months by hand.”

Getting Started

If you're already an Agentbot user on the Label plan, Claude Fable 5 is available now — just select it from the model dropdown in your agent settings.

New to Agentbot? Sign up at agentbot.sh and deploy your first agent in minutes.