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Claude Fable 5.1

Anthropic · claude-fable-5-1

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Claude model for demanding reasoning and long-horizon agentic work

Specification

anthropic listing

Context
1M
Max output
128K
Released
2026-09-01
Knowledge cutoff
2026-06
Retires
2027-12-05
Open weights
no
Input
text, image, pdf
Output
text

Price

US dollars per million tokens · anthropic list price

Input
$10.00
Output
$50.00
Cache read
$0.25
Cache write
$12.50

Batch and priority prices

US dollars per million tokens · per listing

PriceListing$/M
Batch inputanthropic$5.00
Batch outputanthropic$25.00
Cache write, 1 hourbedrock_converse$20.00
Cache write, 1 hourbedrock_converse · us$22.00
Cache write, 1 hourbedrock$24.00

Batch input is 50% below the interactive input price at the same listing.

Quality

14 benchmarks · 2 sources

Composite
92nd
percentile of 344 scored models
Rank
28 / 344
±0.07 sd
Evidence
14 × 2
3 or more benchmarks, from 2 or more sources
Effort range
—
one configuration only
coding96th1/3 bench
reasoning96th3/4 bench
math97th3/7 bench
knowledge94th1/1 bench
general100th1/1 bench

By reasoning effort

every setting placed on the same scale as the leaderboard

SettingCompositeBenchmarks behind it
high96th1
max91st12

Every score

one row per source and configuration — nothing averaged away

BenchmarkScoreConfigurationSourceRun
Mystery Game Puzzles58.0 ±5.0maxEpoch AI2026-09-01
FrontierMath-Tier-4-v287.8 ±5.2maxEpoch AI2026-09-01
SimpleQA Verified70.8 ±1.4maxEpoch AI2026-09-01
FrontierMath-Tiers-1-3-v290.2 ±1.8maxEpoch AI2026-09-01
LiveBench83.8max · 23 runsLiveBench2026-06-25
Furniture Assembly70.0 ±5.7maxEpoch AI2026-09-10
MirrorCode73.3 ±9.2highEpoch AI2026-09-10
OTIS Mock AIME 2024-2025100.0 ±0.0maxEpoch AI2026-09-01
EBR-bench57.1 ±6.0maxEpoch AI2026-09-08
Chess Puzzles48.0 ±5.0maxEpoch AI2026-10-13
SpireClimb (Slay the Spire 1, Ascension 20 Heart)0.0 ±0.0maxEpoch AI2026-09-25
SpireClimb2.0 ±1.1maxEpoch AI2026-09-25
SpireClimb (Slay the Spire 2, Ascension 10)4.0 ±2.3maxEpoch AI2026-09-25
FrontierMath-Erdos0.0 ±0.0maxEpoch AI2026-09-01

The leading figure for a benchmark is the median across its configurations, so one heroic high-effort run cannot set the number.

Available from 49 hosts

HostIn $/MOut $/MCache rdCache wrContextOutputRetires
anthropicvendor$10.00$50.00$0.25$12.501M128K—
302ai$10.00$50.00$0.25$12.501M128K—
aimlapi$10.00$50.00$0.25$12.501M128K—
aixy$10.00$50.00$0.25$12.501M128K—
amazon-bedrock$10.00$50.00$0.25$12.501M128K—
amazon-bedrock · global$10.00$50.00$0.25$12.501M128K—
azure$10.00$50.00$0.25$12.501M128K—
azure_ai$10.00$50.00$0.25$12.501M128K2027-12-05
azure-cognitive-services$10.00$50.00$0.25$12.501M128K—
bedrock_converse$10.00$50.00$0.25$12.501M128K—
bedrock_converse · global$10.00$50.00$0.25$12.501M128K—
boundless$10.00$50.00$0.25—262K128K—
cloudflare-ai-gateway$10.00$50.00$0.25$12.501M128K—
commandcode$10.00$50.00$0.25$12.501M128K—
crossmodel$10.00$50.00$0.25$12.501M128K—
databricks$10.00$50.00$0.25$12.501M128K—
edenai$10.00$50.00$0.25$12.501M128K—
github_copilot · github-copilot$10.00$50.00$0.25$12.50200K64K—
github-copilot$10.00$50.00$0.25$12.501M128K—
kilo$10.00$50.00$0.25$12.501M128K—
llmgateway$10.00$50.00$0.25$12.501M128K—
llmgateway-providers$10.00$50.00$0.25$12.501M128K—
llmgateway-providers · aws-bedrock$10.00$50.00$0.25$12.501M128K—
llmgateway-providers · azure-anthropic$10.00$50.00$0.25$12.501M128K—
merge-gateway$10.00$50.00$0.25$12.501M128K—
nano-gpt$10.00$50.00$0.25$12.501M128K—
nearai$10.00$50.00$0.25—1M128K—
neon$10.00$50.00$0.25$12.501M128K—
ofox$10.00$50.00$0.25$12.501M128K—
opencode$10.00$50.00$0.25$12.501M128K—
openrouter$10.00$50.00$0.25$12.501M128K—
opper$10.00$50.00$0.25$12.501M128K—
perplexity$10.00$50.00$0.25————
perplexity-agent$10.00$50.00$0.25$12.501M128K—
prime$10.00$50.00——1M128K—
requesty$10.00$50.00$0.25$12.501M128K—
standardcompute$10.00$50.00$0.25$12.501M50K—
tempr$10.00$50.00$0.25$12.501M128K—
venice$10.00$50.00$0.25$12.501M128K—
vercel$10.00$50.00$0.25$12.501M128K—
vertex_ai-anthropic_models$10.00$50.00$0.25$12.501M128K2027-03-01
vivgrid$10.00$50.00$0.50$12.501M128K—
zenmux$10.00$50.00$0.25$12.501M128K—
aihubmix$11.00$55.00$0.275$13.751M128K—
amazon-bedrock · us$11.00$55.00$0.275$13.751M128K—
bedrock_converse · eu$11.00$55.00$0.275$13.751M128K—
bedrock_converse · us$11.00$55.00$0.275$13.751M128K—
bedrock
$12.00
$10.00
$60.00
$50.00
$0.30
$0.25
$15.00
$12.50
1M128K—
kyma · kyma$13.50$67.50——1M128K—

Price history

append-only observations · a listing writes a row only when its price moves

DateHostField$/M
2026-09-02bedrock_converseCache read$0.25
2026-09-24bedrock_converseCache read$0.275
2026-09-25bedrock_converseCache read$0.25
2026-09-02openrouterCache read$0.25
2026-09-06openrouterCache read$0.25
2026-10-10openrouterCache read$0.25
2026-09-02veniceCache read$0.30
2026-10-15veniceCache read$0.25
2026-09-02bedrock_converseCache write$12.50
2026-09-24bedrock_converseCache write$13.75
2026-09-25bedrock_converseCache write$12.50
2026-09-02openrouterCache write$12.50
2026-09-06openrouterCache write$12.50
2026-10-10openrouterCache write$12.50
2026-09-02veniceCache write$15.00
2026-10-15veniceCache write$12.50
2026-09-02bedrock_converseInput$10.00
2026-09-24bedrock_converseInput$11.00
2026-09-25bedrock_converseInput$10.00
2026-09-02openrouterInput$10.00
2026-09-06openrouterInput$10.00
2026-10-10openrouterInput$10.00
2026-09-02veniceInput$12.00
2026-10-15veniceInput$10.00
2026-09-02bedrock_converseOutput$50.00
2026-09-24bedrock_converseOutput$55.00
2026-09-25bedrock_converseOutput$50.00
2026-09-02openrouterOutput$50.00
2026-09-06openrouterOutput$50.00
2026-10-10openrouterOutput$50.00
2026-09-02veniceOutput$60.00
2026-10-15veniceOutput$50.00
2026-09-06databricksInput$10.0001
2026-10-29databricksInput$10.00
2026-09-09bedrockCache read$0.30
2026-10-25bedrockCache read$0.30
2026-09-09bedrockCache write$15.00
2026-10-25bedrockCache write$15.00
2026-09-09bedrockInput$12.00
2026-10-25bedrockInput$12.00
2026-09-09bedrockOutput$60.00
2026-10-25bedrockOutput$60.00
2026-10-13aimlapiCache read$0.325
2026-10-23aimlapiCache read$0.25
2026-10-13aimlapiInput$13.00
2026-10-23aimlapiInput$10.00
2026-10-13aimlapiOutput$65.00
2026-10-23aimlapiOutput$50.00
2026-10-21aimlapiCache write$16.25
2026-10-23aimlapiCache write$12.50

Other listings of this model

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