Anthropic API

Fable 5 input

• Input billing for the Fable model.
• For demanding text and agent workflows.
• Price and scope are linked in the official source.

Fable 5 cache write

• Billing for writing into the prompt cache.
• For long system prompts and stable tool schemas.
• Price and scope are linked in the official source.

Fable 5 cache read

• Reduced input billing on cache hits.
• Scales to long conversations and agent loops.
• Price and scope are linked in the official source.

Fable 5 output

• Output billing for the Fable model.
• For more extensive model responses.
• Price and scope are linked in the official source.

Opus 4.8 input

• Input billing for a high-capability Claude model.
• Suited to complex reasoning and text tasks.
• Price and scope are linked in the official source.

Opus 4.8 cache write

• Billing for writing into the prompt cache.
• Lowers cost for reusable contexts.
• Price and scope are linked in the official source.

Opus 4.8 cache read

• Reduced input billing on cache hits.
• For enterprise and agent workloads with long contexts.
• Price and scope are linked in the official source.

Opus 4.8 output

• Output billing for Opus responses.
• For detailed results in complex workflows.
• Price and scope are linked in the official source.

Sonnet 5 input

• Introductory input billing for Sonnet 5.
• For high-performance coding and agent tasks.
• Price and scope are linked in the official source.

Sonnet 5 cache write

• Billing for writes to the Sonnet 5 prompt cache.
• For reusable long contexts and tool definitions.
• Price and scope are linked in the official source.

Sonnet 5 cache read

• Reduced input billing on cache hits.
• For recurring agent and coding contexts.
• Price and scope are linked in the official source.

Sonnet 5 output

• Introductory billing for Sonnet 5 output.
• For model responses in coding and agent workflows.
• Price and scope are linked in the official source.

Sonnet 4.6 input

• Input billing for Sonnet tasks.
• A balanced option for text and coding work.
• Price and scope are linked in the official source.

Sonnet 4.6 cache write

• Billing for writing into the prompt cache.
• Saves cost in typical production contexts.
• Price and scope are linked in the official source.

Sonnet 4.6 cache read

• Reduced input billing on cache hits.
• For recurring system prompts and tool definitions.
• Price and scope are linked in the official source.

Sonnet 4.6 output

• Output billing for Sonnet responses.
• For responses in production applications.
• Price and scope are linked in the official source.

Haiku 4.5 input

• Input billing for fast Claude workflows.
• For frequent, lighter requests.
• Price and scope are linked in the official source.

Haiku 4.5 cache write

• Billing for writing into the prompt cache.
• For high-throughput classifiers and small agents.
• Price and scope are linked in the official source.

Haiku 4.5 cache read

• Reduced input billing on cache hits.
• Very low read rates for high-frequency requests.
• Price and scope are linked in the official source.

Haiku 4.5 output

• Output billing for Haiku responses.
• For fast responses at high throughput.
• Price and scope are linked in the official source.