Anthropic just cut the price of frontier intelligence in half

Claude Opus 5 lands within 0.5% of Fable 5 on coding at half the cost, triples the field on ARC-AGI 3, and ships with 85% fewer safety blocks. The full playbook: effort dial, routing table, prompts, m

Anthropic shipped Claude Opus 5 today, and the headline number is the one they refused to raise.

The price.

Same $5 in, $25 out as Opus 4.8. Half of what Fable 5 charges. And the performance sits close enough to the frontier that the tier below it just became the default for almost everyone:

▫️ Frontier-Bench v0.1: 43.3%, against Opus 4.8’s 18.7% and Fable 5’s 33.7%

▫️ CursorBench 3.2: within 0.5% of Fable 5’s peak, at half the cost per task

▫️ ARC-AGI 3: three times the next-best model, on a test built so memorization fails

▫️ OSWorld 2.0: past Fable 5’s best result at a third of the cost

The customer numbers hit harder than the benchmarks. Harvey matched Opus 4.8’s max-reasoning quality using 26% fewer tokens. Zapier’s churn workflow went from failing every prior model to 100%. A trading firm hit its best Opus score on a seventh of the reasoning tokens.

Here is the free insight: this is a price-per-outcome launch wearing a model launch costume. Anthropic held the sticker price flat and moved everything underneath it. Intelligence up, tokens down, safety blocks down 85%, speed up 2.5x in Fast mode. Your bill for the same work drops even though the price page stayed identical.

That only happens if you drive it correctly. Most people will run it on defaults and leave the upside sitting there.

Behind the paywall, The Opus 5 Playbook:

▫️ The effort dial, what each setting costs and returns, and why running max is the standard way to overpay

▫️ The routing table, what goes to Opus 5, what stays on Fable 5, what drops to Sonnet

▫️ The cost math, worked examples on an $8K monthly bill

▫️ Six copy-paste prompts built around the one behavior every early tester named

▫️ The two beta features agent builders should care about more than any benchmark

▫️ The safeguards map, what opened up, what stays blocked, how the fallback works

▫️ The migration checklist, by source model, with your loops intact

▫️ The eval protocol and the honest limits, including what still belongs on Fable 5

One subscription unlocks every system

This is one build in a growing library. Premium opens all of them:

▫️ The Claude and Anthropic library

▫️ The AI Agents library

▫️ The AI Tools and Models library

Plus 3 fresh systems every week. One correctly set effort dial pays the subscription back inside a week.

🧠 The Opus 5 Playbook

The effort dial, the routing table, the cost math, six prompts, the migration checklist, and the honest limits, in one system.

Get The Opus 5 Playbook below 👇

Try premium free for 7 days. Or get 50% off this week only.