Models/Claude Fable 5.1 (Max, Default Fallback)

Claude Fable 5.1 (Max, Default Fallback)Ready

claude-fable-5-1

Serverless APILLMReasoningVisionPrompt cachingClosed

A creativity-tuned Claude for long-form writing, narrative synthesis, and careful editing. It ranks #4 of the top 20 frontier models on the Artificial Analysis Intelligence Index with a score of 53.4. Released September 1, 2026.

Context

—

Parameters

Intelligence rank · 53.4

Closed

Weights

View full spec

ReleasedSep 1, 2026

Knowledge cutoff—

Size classlarge

Input modalitiestext, image

Output modalitiestext

Median output speed71 tok/s

Median time to first token257.0s

Usage guide

1. Choose how you'd like to use Claude Fable 5.1 (Max, Default Fallback)

☁️ Serverless

Use with pay-per-token pricing. Zero setup, no cold starts, automatic failover between upstream routes.

Usage tiers · Standard • Priority

Try it — sign in

curl https://tokenhub-staging.coality.io/v1/chat/completions \
  -H "Authorization: Bearer $TOKEN_HUB_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "claude-fable-5-1",
    "messages": [{"role": "user", "content": "Explain vector databases in one paragraph"}]
  }'

Pricing

Bucket	Price	Notes
Input tokens	$12.50	per 1M tokens
Output tokens	$62.50	per 1M tokens
Cache read	$0.3125	cached input · 98% off
Cache write	$15.63	per 1M tokens

Billed per token with micro-dollar precision · effective Oct 26, 2026 · default key limits 600 req/min · 200K tokens/min

Benchmarks

GPQA Diamond

93.7

Humanity's Last Exam

59.1

SciCode

63.1

Terminal-Bench 4.0

52.0

Long Context Reasoning

85.3

Frontier Code

49.0

Scores from the Artificial Analysis evaluation suite (0–100 scale).

About this model

Closed model, with a 1M context window, native image input, visible reasoning traces, prompt caching at a 98% discount on cached input, 71 output tokens/s median serving speed and 257.0s to first token.