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By using Claude Fable 5, you consent to data retention for purposes of monitoring safe and compliant use of AI. Anthropic's data retention policy does not allow zero data retention. Learn more(opens in new tab)

Azure, Google Vertex, and Amazon Bedrock endpoints are BYOK-only while we work on enabling public access.

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Anthropic: Claude Fable 5 (batch)

anthropic/claude-fable-5:batch

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Claude Fable 5 is a Mythos-class model from Anthropic, built for autonomous knowledge work and coding. It supports text, image, and file inputs with text output, with reasoning support and a 1M-token context window. It is suited for long-running, complex, and asynchronous tasks that previously required frequent human check-ins.

It is particularly strong at end-to-end work that would otherwise take a person hours, days, or weeks - taking on problems that are long-running, ambiguous, or highly multi-step. It executes well-scoped tasks with few mistakes, automatically self-correcting through verification loops, and ships with robust safeguards.

Modalities

In / Out Price

$5 / $25per 1M

Context

1M

Released

Jun 9, 2026

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ProvidersPricingPerformanceUptimeBenchmarksAppsActivityFAQ

Providers

Different companies host the same model. OpenRouter routes your request to one of them based on the routing mode you pick — Balanced (price + speed), Nitro (fastest), or Exacto (highest tool-calling accuracy).

Pricing

The average price customers actually pay for this model, next to the prices providers post. Caching and discounts mean the price actually paid is often well below the listed one.

Performance

Throughput is how fast the model writes (tokens per second — higher is better). Latency is total round-trip time (lower is better). TTFT is time-to-first-token — how long before you see anything appear (lower is better).

Uptime

Uptime is the percentage of the past 3 days that at least one provider was responding to requests. Availability is the percentage of time that inference was successfully served. OpenRouter continuously monitors and uses the next-best provider when one returns an error.

Benchmarks

Scores on standardized evaluations. Higher percentages are better — and rank percentile shows where this model lands among all models on OpenRouter.

Apps

Public apps that send the most traffic to this model. Good signal for what real production workloads look like — and a hint at which use cases this model is best suited for.

Activity

Token volume and request traffic to this model over time.

Quick Start

Drop-in code to call this model. OpenRouter's API is OpenAI-compatible — most SDKs work by just swapping the base URL. The only thing that changes between models is the model slug below.

About Anthropic: Claude Fable 5 (batch)

OpenRouter makes Anthropic: Claude Fable 5 (batch) available through a unified, OpenAI-compatible API using the model ID anthropic/claude-fable-5:batch. It is served by Anthropic.

Anthropic: Claude Fable 5 (batch) accepts text, images and files such as PDFs and returns text. It has a 1,000,000-token context window and a maximum output of 128,000 tokens.

On OpenRouter, Anthropic: Claude Fable 5 (batch) costs $5.00/M input tokens and $25.00/M output tokens, with separate rates for Cache Read at $0.50/M tokens, Cache Write at $6.25/M tokens, Cache Write (1h) at $10.00/M tokens and Web Search at $10.00/1K calls. Effective pricing can be lower when prompt caching applies. It was released on June 9, 2026.

More models from Anthropic

  • Claude Opus 5 (Fast)
  • Claude Opus 5
  • Claude Sonnet 5

Frequently asked questions

Claude Fable 5 is a Mythos-class model from Anthropic, built for autonomous knowledge work and coding. It supports text, image, and file inputs with text output, with reasoning support and a 1M-token context window. It is suited for long-running, complex, and asynchronous tasks that previously required frequent human check-ins.

Claude Fable 5 (batch) costs $5.00/M input tokens and $25.00/M output tokens, with separate rates for Cache Read at $0.50/M tokens, Cache Write at $6.25/M tokens, Cache Write (1h) at $10.00/M tokens and Web Search at $10.00/1K calls.

Claude Fable 5 (batch) has a 1,000,000 token context window. It supports up to 128,000 completion tokens.

Yes. Claude Fable 5 (batch) accepts tools and tool_choice for function calling. It also supports structured outputs via a JSON schema in response_format.

Claude Fable 5 (batch) accepts text, images and files such as PDFs as input and returns text.

Claude Opus 5 (Fast), Claude Opus 5, Claude Sonnet 5 and 13 more are other text models from Anthropic.

Claude Fable 5 (batch) was released on June 9, 2026.

$5.00$25.00$0.50----
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AutoExacto Benchmarks
GPQA DiamondTAU-Bench
auto-routing
82.2%82.1%
Azure
81.3%81.2%
Claude Platform on AWS
81.6%80.5%
Anthropic
82.0%80.0%
Google Vertex
79.5%80.2%
Google Vertex (Europe)
78.1%79.2%
Amazon Bedrock
0.0%0.0%
+1 more providers

Not enough uptime data to display yet.

When an error occurs in an upstream provider, we can recover by routing to another healthy provider, if your request filters allow it. You can access per-provider uptime data programmatically through the Endpoints API. Learn more about our load balancing and customization options.

Not enough data for apps using this model yet.