Claude Fable 5.1

Language Anthropic Verified Released Sep 1, 2026

Prices

6 offerings · prices as listed

Claude API Global · USD claude-fable-5-1

Conditions/ 1M tokens	Input	Cache read	Cache write		Output
Conditions/ 1M tokens	Input	Cache read	5-minute cache	1-hour cache	Output
Standard	$10.00	$0.25	$12.50	$20.00	$50.00
Batch	$5.00	—	—	—	$25.00

Standard: the price a request with no conditions pays (the headline price elsewhere on the site).

Not stated on Anthropic’s pages: max input, reasoning can be off, max thinking budget, built-in tools, aliases.

From third-party leaderboards, not measured by us

Epoch Capabilities Index 166.9

#5 of 118 listed models · CI 164.3–169.9
LMArena Text 1,503

#6 of 163 listed models · max effort · CI 1,498–1,509 · 19,755 votes
Epoch AI · Chess Puzzles 48%

#20 of 85 listed models · max effort · ±5.02
Epoch AI · EBR-bench 57.1%

#5 of 28 listed models · max effort · ±6.02

Epoch AI, 'Capabilities & benchmarking'. Published online at epoch.ai. Retrieved from 'https://epoch.ai/benchmarks'. Licensed CC BY 4.0. · License · as of Oct 28 – Nov 5, 2026
LMArena (Arena), leaderboard-dataset on Hugging Face, licensed CC BY 4.0 · License · as of Nov 8, 2026
EQ-Bench by Samuel J. Paech (eqbench.com; EQ-bench/EQ-bench-site on GitHub), MIT License. · License · as of Oct 28, 2026
LiveBench (White et al.), release 2026-06-25, livebench.ai, licensed CC BY-SA 4.0. This board, adapted from it, is shared under CC BY-SA 4.0. · License · as of Jun 25, 2026
Terminal-Bench 4.0 leaderboard (Marten, Shaw et al., Terminal-Bench; harbor-framework/terminal-bench on GitHub), licensed Apache-2.0. · License · as of Sep 29, 2026
changes we made

Published by Anthropic, under the conditions it states

Benchmark	Setting	Score
SWE-bench Pro	adaptive thinking, max effort, average of 5 trials	81.2%
SWE-bench Multilingual	adaptive thinking, max effort, average of 5 trials	89.1%
SWE-bench Multimodal	adaptive thinking, max effort, average of 5 trials	54.7%
Terminal-Bench 4.0	adaptive thinking, production safeguards enabled	55.8%
Humanity's Last Exam	no tools, adaptive thinking, max effort	60.9%
	with tools, adaptive thinking, max effort	65%
OSWorld 2.0	partial score, adaptive thinking, max effort	77.9%
	strict score, adaptive thinking, max effort	41.7%

GitHub Copilot Pro+ $39.00 / month

7,000 credits per month
Variable additional usage on top of your base. Flex allotments may change over time.
70 USD of usage per month
GitHub Copilot Max $100.00 / month

20,000 credits per month
Variable additional usage on top of your base. Flex allotments may change over time.
GitHub Copilot Business $19.00 / month

1,900 credits per month
GitHub Copilot Enterprise $39.00 / month

3,900 credits per month

Sep 1, 2026Release Anthropic releases Claude Fable 5.1 Anthropic launched Claude Fable 5.1 (claude-fable-5-1), successor to Claude Fable 5. Context is 1M tokens, max output 128k, price $10/$50 per MTok, cache reads $0.25 per MTok, on Claude API, Bedrock, AWS, Google Cloud, and Microsoft Foundry.
Sep 1, 2026Pricing Anthropic prices Claude Fable 5.1 cache reads Cache-read price for Claude Fable 5.1 and Claude Mythos 5.1 is $0.25 per million tokens, 0.025 times base input, versus 0.1 times on other models. Cache write prices are unchanged.

Oct 13, 2026 Now priced on Amazon Bedrock Input $10.00 · Output $50.00 · Cache write (5-minute cache) $12.50 · Cache write (1-hour cache) $20.00 · +1 more
Oct 8, 2026 Cache read (Batch) price raised 100% $0.1375 → $0.275 / 1M tokens · Google Cloud Vertex AI, EU
Sep 26, 2026 3 new prices on Claude API Cache write (1-hour cache) $20.00 · Input (Batch) $5.00 · Output (Batch) $25.00
Sep 26, 2026 New language model

Anthropic · United States · anthropic.com

Snapshots, the same family and other models from this provider