AI Index

Claude Fable 5vsClaude Fable 5.1

Both language models, compared at each maker’s own API list prices. Every figure links to its source.

Compare at your usage

Every model priced for the same request
Prompt per request
Cache hits
Batch

8,000 tokens in, 2,000 out

Claude Fable 5 on Claude APIClaude Fable 5.1 on Claude API
Rate appliedBase rateBase rate
Inputper 1M tokens$10.00 $10.00
Cache readper 1M tokens$1.00 $0.25
Outputper 1M tokens$50.00 $50.00
Cost per request$0.18$0.18
Per 1,000 requests$180.00$180.00

Every model is priced for the same request at its maker’s own list prices (each with its source and date), so bold marks the cheapest. A model that can’t serve the request is named, not ranked; a condition its seller doesn’t price says which rate was used.

Cost per request as prompts grow

2K tokens out, list price on each maker’s API.

0$5.00$10.000250K500K750K1Mprompt tokens per request8KClaude Fable 5$0.18 at 8KClaude Fable 5.1$0.18 at 8K
  • Claude Fable 5 · Claude API
  • Claude Fable 5.1 · Claude API

Where each stands among all scored models

Each line runs from the lowest to the highest score on the board; the tick is the median.

Epoch Capabilities Index#9 vs #5 of 118Claude Fable 5.1: 166.9Claude Fable 5: 164.2LMArena Text#6 vs #5 of 163Claude Fable 5.1: 1,504Claude Fable 5: 1,504LMArena Text · Coding#4 vs #13 of 163Claude Fable 5.1: 1,537Claude Fable 5: 1,550LMArena Vision#1 vs #4 of 89Claude Fable 5.1: 1,320Claude Fable 5: 1,325
  • Claude Fable 5
  • Claude Fable 5.1

Key differences

Claude Fable 5Claude Fable 5.1
Knowledge cutoff
Jan 2026 Claude Fable 5 model overview · as of Nov 1, 2026
Jun 2026 Claude Fable 5.1 model overview · as of Nov 1, 2026
Cache readMaker’s official API · global · USD
$1.00 / 1M tokens Claude API pricing · as of Nov 1, 2026
$0.25 / 1M tokens Claude API pricing · as of Nov 1, 2026

These differences use verified vendor specifications or each maker’s official API on the same region, currency, meter and billing conditions. Different conditions remain side by side in the full table; they do not establish which model is cheaper. Declared features describe support, not measured quality or a recommendation. Missing evidence does not mean a feature is unsupported.

Full comparison

Claude Fable 5 Anthropic Claude Fable 5.1 Anthropic
Overview
ReleasedJun 9, 2026 Sep 1, 2026
Open weights— —
Knowledge cutoffJan 2026 Jun 2026
Specs
Context1M 1M
Max output128K 128K
Input modalitiesText, Image Text, Image
Output modalitiesText Text
ReasoningYes Yes
Reasoning effortslow, medium, high, xhigh, max low, medium, high, xhigh, max
Reasoning can be off— Not stated
Tool useYes Yes
Structured outputYes Yes
Pricing · per 1M tokens
Input price$10.00Also priced under other conditions: Batch $10.00Also priced under other conditions: Batch
Output price$50.00Also priced under other conditions: Batch $50.00Also priced under other conditions: Batch
Cache read price$1.00 $0.25
Cache write price$12.50Also priced under other conditions: 1-hour cache5-minute cache $12.50Also priced under other conditions: 1-hour cache5-minute cache
Cache write price (1-hour cache)$20.001-hour cache $20.001-hour cache
Blended price (3 input : 1 output)$20.00 $20.00
Pricing under conditions · per 1M tokens
Batch input price$5.00Batch $5.00Batch
Batch output price$25.00Batch $25.00Batch
Cited scores
Epoch Capabilities Index164.2 166.9
LMArena Text1,504 high effort1,504 max effort
LMArena Text · Coding1,550 high effort1,537 max effort
LMArena Vision1,325 high effort1,320 max effort
LMArena Text · Chinese1,555 high effort1,565 max effort
Epoch AI · GPQA Diamond85.9% max effort—
Epoch AI · FrontierMath Tiers 1–387% max effort90.2% max effort

Headline prices may come from different channels, regions or tiers. Check each source before choosing a model; missing facts stay blank.

Model details and sources

Cited scores