Claude Fable 5 Pricing and Access (2026)

Last verified: June 13, 2026

Claude Fable 5 (claude-fable-5) is Anthropic’s most capable widely released model, built for the most demanding reasoning and long-horizon agentic work. On the Claude API it is priced at $10 per million input tokens and $50 per million output tokens — double the rate of Claude Opus 4.8 — with a 1M-token context window and up to 128K output tokens per request. It reached general availability on June 9, 2026. The verified pricing and access details are below.

Pricing at a glance

All figures below are from Anthropic’s official pricing and models pages. Prices are in USD per million tokens (MTok). Fable 5 includes the full 1M-token context window at standard pricing — there is no long-context premium.

Item

Claude Fable 5

Model ID (API)

claude-fable-5

Base input

$10 / MTok

Output

$50 / MTok

5-minute cache write

$12.50 / MTok

1-hour cache write

$20 / MTok

Cache hit / read

$1 / MTok

Batch API input / output

$5 / MTok · $25 / MTok

Context window

1M tokens

Max output

128K tokens

How Fable 5 compares to Opus, Sonnet, and Haiku

Fable 5 sits at the top of Anthropic’s lineup, a tier above the Opus models. The per-token cost difference is the clearest way to see where it fits.

Model

Input $/MTok

Output $/MTok

Context

Max output

Claude Fable 5

$10

$50

1M

128K

Claude Opus 4.8

$5

$25

1M

128K

Claude Sonnet 4.6

$3

$15

1M

64K

Claude Haiku 4.5

$1

$5

200K

64K

Where you can use Fable 5

At general availability, Fable 5 is offered across Anthropic’s first-party API and all major cloud platforms, plus claude.ai subscription plans (subject to the access note below). The model IDs differ by platform.

Surface

Availability / model ID

Claude API (first-party)

Generally available — claude-fable-5

Claude Platform on AWS

Generally available — claude-fable-5

Amazon Bedrock

Generally available — anthropic.claude-fable-5

Google Vertex AI

Generally available — claude-fable-5

Microsoft Foundry

Generally available

claude.ai — Pro, Max, Team, Enterprise

Promotional access June 9–22, 2026 (see below)

claude.ai — Free plan

Not included

Consumer-plan access and the promotional window

For claude.ai subscribers, Anthropic launched Fable 5 with a time-limited promotion rather than a permanent plan inclusion. From June 9 through June 22, 2026, Fable 5 was included on the Pro, Max, Team, and seat-based Enterprise plans at no extra charge. During that window, Anthropic’s documentation states that Fable 5 usage “counts toward your plan’s usage limits, and you won’t be charged anything extra,” but that it draws from those limits “at a higher rate than other models.” The Free plan was explicitly excluded.

Anthropic’s announced plan was that after June 22, 2026, Fable 5 would no longer be included in plan usage limits, and continued use on claude.ai would require usage credits — a pay-as-you-go balance for usage beyond what a plan includes.

Integration notes that affect cost and handling

Fable 5 differs from the Opus, Sonnet, and Haiku models in a few ways that matter when you wire it into an application. It ships with safety classifiers that can decline a request: when that happens, the Messages API returns stop_reason: "refusal" as a successful HTTP 200 response, not an error. You are not billed for a request that is refused before any output is generated, and Anthropic provides server-side, client-side, and manual fallback paths to retry on another Claude model. Adaptive thinking is always on (thinking: {"type": "disabled"} is not supported), and the raw chain of thought is never returned — thinking.display controls whether thinking blocks contain a summary or are empty. Fable 5 also uses the tokenizer introduced with Opus 4.7, which can produce roughly 30–35% more tokens for the same text than older models, so re-baseline your token counts rather than assuming parity with earlier Claude models.

How much does Claude Fable 5 cost?

On the Claude API, Fable 5 costs $10 per million input tokens and $50 per million output tokens. Prompt-cache writes are $12.50/MTok (5-minute) or $20/MTok (1-hour), cache reads are $1/MTok, and the Batch API halves the rate to $5/MTok input and $25/MTok output.

Is Fable 5 more expensive than Claude Opus 4.8?

Yes. Fable 5 is priced at exactly double Opus 4.8 on both input ($10 vs $5 per MTok) and output ($50 vs $25 per MTok). Both share a 1M-token context window and 128K max output.

Which claude.ai plans include Fable 5?

From June 9 to June 22, 2026, Fable 5 was included on the Pro, Max, Team, and seat-based Enterprise plans at no extra cost, drawing from plan usage limits at a higher rate. The Free plan was not included. Anthropic’s plan was to move continued claude.ai use to usage credits after June 22.

What is the difference between Fable 5 and Mythos 5?

They share the same specs ($10/$50 per MTok, 1M context, 128K output) and June 9, 2026 launch date. Fable 5 is the generally available model with built-in safety classifiers that can decline requests; Mythos 5 is offered only in limited availability.