Claude Fable 5.1 API pricing — what it really costs
Claude Fable 5.1 (Anthropic) costs $10 per 1M input tokens and $50 per 1M output tokens — with prompt caching, cached input drops to $0.250. Anthropic's most capable model. Prices verified 2026-10-17; we track the price you are actually billed today, including promotional rates.
Price per 1M tokens
| Input | Output | Cached input |
|---|---|---|
| $10 | $50 | $0.250 |
Real monthly costs on Claude Fable 5.1
Three realistic workloads, computed from the prices above (cached share billed at the cache-read rate where the provider offers one):
Customer-support chatbot
$33.30/mo
2M input + 0.5M output tokens/month, 60% of input served from prompt cache
RAG / document Q&A
$114/mo
20M input + 1M output tokens/month, 70% cached (shared context)
Agentic coding assistant
$360/mo
50M input + 5M output tokens/month, 80% cached (long sessions)
Want exact numbers for your usage? Open the calculator — same verified prices, your token volumes.
Compare Claude Fable 5.1
- Claude Fable 5.1 vs GPT-6 Astra — which is cheaper?
- Claude Fable 5.1 vs Claude Opus 5.5 — which is cheaper?
- Claude Fable 5.1 vs Claude Fable 5 — which is cheaper?
FAQ
How much does the Claude Fable 5.1 API cost?
Claude Fable 5.1 costs $10 per 1M input tokens and $50 per 1M output tokens. Cached input tokens cost $0.250 per 1M. Note: Anthropic's most capable model. Pricing verified 2026-10-17.
What does a typical workload cost on Claude Fable 5.1?
Customer-support chatbot: about $33.30/month (2M input + 0.5M output tokens/month, 60% of input served from prompt cache). RAG / document Q&A: about $114/month (20M input + 1M output tokens/month, 70% cached (shared context)). Agentic coding assistant: about $360/month (50M input + 5M output tokens/month, 80% cached (long sessions))
Is Claude Fable 5.1 expensive compared to other models?
Claude Fable 5.1 ranks #20 of 23 models by blended price in our comparison. The cheapest tracked models are Claude Haiku 5.5 and GPT-6 Luna at $0.100/$0.500 per 1M tokens.