Fable 5.2 vs Opus 5.5 costCalculators

Fable 5.2 vs Opus 5.5 cost per task. Your tokens, Anthropic's prices.

Type the input and output tokens of one task and how many tasks a month. See the cost on Fable 5.2, Fable 5.2 fast mode and Opus 5.5 side by side, with each price linked to the Anthropic page it comes from.

Cost to you

Free

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Use the Fable 5.2 vs Opus 5.5 cost calculator here

It runs in your browser. Nothing you type is sent anywhere, there is no signup and no limit.

Cost side by side

Fable 5.2

$8 input and $40 output per million tokens. Source

Per task: $48.00
Per month: $48.00

Cache reads cost 2.5% of base input. Source

Fable 5.2 fast mode

$16 input and $80 output per million tokens. Source

Per task: $96.00
Per month: $96.00

Anthropic says fast mode speeds up token generation by up to 2.5 times. Source

Opus 5.5

$4 input and $20 output per million tokens. Source

Per task: $24.00
Per month: $24.00

Cache reads cost 5% of base input. Source

Anthropic's guidance: start with Opus 5.5 for most workloads, use Fable 5.2 for demanding reasoning and long-horizon agentic work. Models overview

Routing template

Claude model routing (Anthropic pages read 2026-11-10; prices in USD per million input / output tokens)

1. Default to Opus 5.5 ($4 / $20). Anthropic: "start with Claude Opus 5.5 for most workloads." Source: https://platform.claude.com/docs/en/about-claude/models/overview
2. Move a task up to Fable 5.2 ($8 / $40) when it is demanding reasoning or long-horizon agentic work, or when your evals on Opus 5.5 at higher effort still fall short. Source: https://platform.claude.com/docs/en/about-claude/models/overview
3. Turn on Fable 5.2 fast mode ($16 / $80, twice the standard price) only when a person waits on the answer. Anthropic says it speeds up token generation by up to 2.5 times. Source: https://www.anthropic.com/claude-fable-and-mythos-5-2
4. When one task splits into simpler parts, let Fable 5.2 orchestrate: Anthropic describes an Orchestrator role where it delegates simpler tasks to smaller models. Source: https://www.anthropic.com/claude-fable-and-mythos-5-2
5. When a Haiku, Sonnet or Opus model hits a harder problem, let it consult Fable 5.2 as Advisor, the role Anthropic describes for that. Source: https://www.anthropic.com/claude-fable-and-mythos-5-2
6. When nobody waits on the result, use the Batch API: 50% off. Cache reads cost 2.5% of base input on Fable 5.2 and 5% on Opus 5.5. Source: https://platform.claude.com/docs/en/about-claude/models/overview

Each line names the Anthropic page it comes from. The Orchestrator and Advisor roles are described on the Fable and Mythos 5.2 page.

Prices are Anthropic's base API prices, read on 2026-11-10 from Claude Fable and Mythos 5.2, Anthropic and Models overview, Claude Platform docs. Uncached input is priced at the base input price. Cache writes, long-context prices and per-platform prices are not counted: the models overview points to Anthropic's pricing page for those. Token counts are yours: this page has no estimate of its own.

Data calls through looot cost the same whichever model makes them. See one from Claude. Runs in your browser, nothing is sent anywhere.

Run it from your agent

Copy one prompt, give it to your agent.

Fill in the placeholder, paste it, and the agent runs the same job with current data on your looot account and shows the cost.

You give it: input and output tokens per task, tasks per month, and optionally a cache read share and the batch api.
Billed per call, nothing while your agent is idle.
The agent shows the price before it calls.

Prompt: Fable 5.2 vs Opus 5.5 cost calculator

Use looot to compare Claude Fable 5.2 and Opus 5.5 cost for my task: [input tokens] input and [output tokens] output tokens per task, [tasks] tasks a month. 1. Set up https://looot.ai/skill.md. 2. Read today's prices from https://platform.claude.com/docs/en/about-claude/models/overview and https://www.anthropic.com/claude-fable-and-mythos-5-2 with the page to markdown job. 3. Work out cost per task and per month for Fable 5.2, its fast mode and Opus 5.5. 4. Return one table with each price's source link.

Give this to your agent

Setup command

set up looot - https://looot.ai/skill.md

What comes back

What your agent gets from fable 5.2 vs opus 5.5 cost

Field names as the providers return them. The exact set varies by endpoint, and your agent reads it from the catalog.

cost per task on Fable 5.2, Fable 5.2 fast mode and Opus 5.5
cost per month on each
each price with a link to the Anthropic page it comes from
a copyable model routing template

Use it for

What people do with fable 5.2 vs opus 5.5 cost

Price a switch
See what moving one task from Opus 5.5 to Fable 5.2 adds to the monthly bill before you change the model id.
Decide on fast mode
Fast mode costs twice the standard Fable 5.2 price per token. See that difference on your own volume.
Budget an agent
Type the tokens of one agent task from your logs and the runs per month. Cache reads and batch are optional.
Plan routing
Copy the routing template: default model, when to move up, when to orchestrate or advise, each line linked to Anthropic.

Set up once

Three steps. Your agent does the rest.

Paste one prompt into your agent

Set up looot

Done, looot is connected.

Copy one prompt from /connect into Claude Code, Cursor, or any MCP agent. No SDK, no dashboard click-through first.

Your agent finds the right operation

Hunter$0.0265

Exa$0.0090

Diffbot$0.0032

The agent finds the operation it needs and sees the price first. It calls nothing blind.

You watch what it cost

Hunter$0.0265

Exa$0.0090

Diffbot$0.0032

Total$0.0387

Every call settles for its quoted price and lands in the ledger. You always know what ran and what it cost.

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FAQ

Questions about fable 5.2 vs opus 5.5 cost

At Anthropic's published prices, Fable 5.2 costs twice what Opus 5.5 costs per token, for input and for output. The calculator shows both price lists with links to Anthropic and the cost of your own task on each.

Twice the standard Fable 5.2 price per token. Anthropic says fast mode speeds up token generation by up to 2.5 times. Both facts are on Anthropic's Fable and Mythos 5.2 page, linked under the calculator.

Anthropic's models overview says to start with Opus 5.5 for most workloads and to use Fable 5.2 for demanding reasoning and long-horizon agentic work, or when your evals on Opus 5.5 at higher effort still fall short.

Anthropic's models overview says prompt cache reads cost 2.5% of the base input price on Fable 5.2 and 5% on Opus 5.5. Set the share of input read from cache and the calculator prices that part at the cache read rate.

The two Anthropic pages this calculator cites do not say. When you pick a combination they do not price, the column shows Anthropic does not say instead of a guess.

From you. The calculator has no token estimates of its own. Take the input and output tokens of a real task from your logs or usage reports and type them in.

Cache writes, long-context prices and per-platform prices. Anthropic's models overview points to its pricing page for those, and the calculator links to it.

Yes. It runs in your browser, needs no account and makes no API call. Nothing you type is sent anywhere.

Updated 10 November 2026

For agents

tool: Fable 5.2 vs Opus 5.5 cost calculator
category: Calculators
input: Input and output tokens per task, tasks per month, and optionally a cache read share and the Batch API
output: cost per task on Fable 5.2, Fable 5.2 fast mode and Opus 5.5, cost per month on each, each price with a link to the Anthropic page it comes from, a copyable model routing template
price: per call, read live from the catalog on the web page
web tool: runs in the visitor's browser, no API call, free with no account
schedule: on demand
setup: https://looot.ai/skill.md
llms.txt: https://looot.ai/llms.txt
updated: 2026-11-10

markdown /free-tools/fable-vs-opus-cost-calculator.md

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