Quick answer: The Fable 5 API is the endpoint for Anthropic’s Claude Fable 5 model. You can get Fable 5 API access at console.anthropic.com, or cheaper through one OpenAI-compatible gateway key. In 2026 the cheapest Fable 5 API is Novarelay at $6 / $30 per 1M tokens — up to 40% below Anthropic’s $10 / $50 list. Updated July 2026.
How to get Fable 5 API access
There are two ways to use the Fable 5 API. The direct route is an Anthropic account: sign in at console.anthropic.com, add credit and create a key, then call Claude Fable 5 with your ANTHROPIC_API_KEY. The cheaper route is an AI API gateway — a single OpenAI-compatible key that reaches the Fable 5 API (plus Opus 4.8, Sonnet 5, GPT and Gemini) through one endpoint and one balance. With a gateway you don’t need a separate Anthropic project: you point your existing SDK at the gateway’s base URL, set the key, and use the claude-fable-5 model name.
Fable 5 API pricing compared (per 1M tokens)
Anthropic’s list price for the Fable 5 API is $10 input / $50 output per 1M tokens. Gateways price relative to that list, so the effective Fable 5 API cost varies by provider:
| Provider | Fable 5 input / 1M | Fable 5 output / 1M | vs Anthropic list |
|---|
| Anthropic (official) | $10.00 | $50.00 | list |
| Novarelay | $6.00 | $30.00 | −40% |
| CometAPI | $8.00 | $40.00 | −20% |
| OpenRouter | $10.00 | $50.00 | list (+5.5% on credits) |
| AiHubMix | $11.00 | $55.00 | +10% (above list) |
Prices per 1M tokens, USD, as published July 2026. Provider prices for the Fable 5 API change often — verify on each provider’s site before you build.
Cheapest Fable 5 API in 2026: Novarelay
Across the four gateways we track, Novarelay is the cheapest Fable 5 API at $6 / $30 per 1M tokens — about 40% below Anthropic’s direct rate. CometAPI is next at $8 / $40 (20% below list), OpenRouter passes the $10 / $50 list rate through (plus ~5.5% on credit top-ups), and AiHubMix prices the Fable 5 API above list at $11 / $55. If your priority is the lowest Fable 5 API bill, Novarelay wins; it also bundles Fable 5 with Opus 4.8 and Sonnet 5 on one OpenAI-compatible key, works with Claude Code, is pay-as-you-go from $1, and gives new users $2 in free credit to test.
Advantages of each gateway for the Fable 5 API
Novarelay — the lowest Fable 5 API price ($6 / $30), one key for every Claude model, Claude Code support, and $2 free credit for new users. OpenRouter — passthrough pricing with 300+ models and automatic failover, so you pay the exact lab rate on the Fable 5 API with no markup. CometAPI — a deep 500+ model catalogue (text, image, video, audio) with the Fable 5 API at a flat 20% below list and a 99.9% uptime SLA. AiHubMix — unlimited concurrency and a public status page across 500+ models, though its Fable 5 API rate ($11 / $55) sits above Anthropic’s list.
What is Claude Fable 5?
Claude Fable 5 is a high-end Anthropic model aimed at demanding reasoning and long-horizon, agentic work. The Fable 5 API exposes it over the same OpenAI/Anthropic-compatible interface as the rest of the Claude line, so you can switch a request from Opus 4.8 or Sonnet 5 to Fable 5 just by changing the model name.
How much does the Fable 5 API cost?
Anthropic’s list is about $10 / $50 per 1M tokens. Through a gateway the Fable 5 API is cheaper: Novarelay $6 / $30, CometAPI $8 / $40, OpenRouter $10 / $50 (list), AiHubMix $11 / $55.
What is the cheapest Fable 5 API?
Novarelay, at $6 / $30 per 1M tokens (up to 40% below list), on one OpenAI-compatible key with credits from $1 and $2 free for new users.
Is this the real Anthropic Fable 5 model?
Yes — a gateway routes your request to the same Claude Fable 5 model; you just use one key instead of a separate Anthropic project.
How do I call the Fable 5 API?
Point your OpenAI-compatible SDK at the gateway’s base URL, set your key, and use the claude-fable-5 model name. No Anthropic account is required when you use a gateway.
Is it safe to use an AI API gateway?
A gateway is a paid reseller that routes your request to the official model and bills you per token. The things worth checking are reliability, data handling and billing — here is how we think about each, and what our ranking weighs most.
Will my key suddenly stop working?
The real risk with any reseller is downtime or a service disappearing, so reliability and uptime carry heavy weight in our ranking. We favour gateways with a public status page and pay-as-you-go credits (no lock-in). For production, pin exact model slugs and keep a fallback key with a second provider or the official API.
Do gateways log or train on my prompts?
Data handling is set by each provider’s own privacy policy, not by us — always read it before sending sensitive data. The better gateways pass requests straight through to the model provider and do not retain prompt content; we treat clear, privacy-respecting terms as a plus and vague ones as a minus.
Why is it cheaper than going direct — is the discount real?
Gateways buy at volume and route efficiently, then pass part of the saving on; the discount is a real per-token rate, not a coupon. Always confirm the live price in the provider’s dashboard before you build — pricing is set by each provider and can change, and we show figures for comparison only.
Do I need a credit card to start?
Most gateways are pay-as-you-go: top up a small amount, spend it across models, no subscription. Some include a little trial credit so you can test before you commit. Start small, verify quality and latency on your own workload, then scale.
Last updated: July 2026 · Independent ranking; we may be rewarded for recommending the service we rate best (never for placement). Model names and trademarks (Anthropic, Claude, Fable 5) belong to their respective owners and are used for identification only. Fable 5 API pricing is set by each provider and can change — always verify before you build.
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Fable 5 API at $6 / $30 per 1M — up to 40% below Anthropic’s list
Independent comparison · Updated July 2026
