Completions

Create a Text Completion

completions.create(**kwargs) -> Completion { id, completion, model, 2 more }

post/v1/complete

ModelsExpand Collapse

class Completion { id, completion, model, 2 more }

id: String

Unique object identifier.

The format and length of IDs may change over time.

completion: String

The resulting completion up to and excluding the stop sequences.

model: Model

The model that will complete your prompt.

See models for additional details and options.

Accepts one of the following:

:"claude-opus-4-5-20251101" | :"claude-opus-4-5" | :"claude-3-7-sonnet-latest" | 17 more

The model that will complete your prompt.

See models for additional details and options.

Accepts one of the following:

:"claude-opus-4-5-20251101"

Premium model combining maximum intelligence with practical performance

:"claude-opus-4-5"

Premium model combining maximum intelligence with practical performance

:"claude-3-7-sonnet-latest"

High-performance model with early extended thinking

:"claude-3-7-sonnet-20250219"

High-performance model with early extended thinking

:"claude-3-5-haiku-latest"

Fastest and most compact model for near-instant responsiveness

:"claude-3-5-haiku-20241022"

Our fastest model

:"claude-haiku-4-5"

Hybrid model, capable of near-instant responses and extended thinking

:"claude-haiku-4-5-20251001"

Hybrid model, capable of near-instant responses and extended thinking

:"claude-sonnet-4-20250514"

High-performance model with extended thinking

:"claude-sonnet-4-0"

High-performance model with extended thinking

:"claude-4-sonnet-20250514"

High-performance model with extended thinking

:"claude-sonnet-4-5"

Our best model for real-world agents and coding

:"claude-sonnet-4-5-20250929"

Our best model for real-world agents and coding

:"claude-opus-4-0"

Our most capable model

:"claude-opus-4-20250514"

Our most capable model

:"claude-4-opus-20250514"

Our most capable model

:"claude-opus-4-1-20250805"

Our most capable model

:"claude-3-opus-latest"

Excels at writing and complex tasks

:"claude-3-opus-20240229"

Excels at writing and complex tasks

:"claude-3-haiku-20240307"

Our previous most fast and cost-effective

String

stop_reason: String

The reason that we stopped.

This may be one the following values:

"stop_sequence": we reached a stop sequence — either provided by you via the stop_sequences parameter, or a stop sequence built into the model
"max_tokens": we exceeded max_tokens_to_sample or the model's maximum

type: :completion

Object type.

For Text Completions, this is always "completion".

Accepts one of the following:

:completion

Completions

Create a Text Completion

completions.create(**kwargs) -> Completion { id, completion, model, 2 more }

post/v1/complete

ModelsExpand Collapse

class Completion { id, completion, model, 2 more }

id: String

Unique object identifier.

The format and length of IDs may change over time.

completion: String

The resulting completion up to and excluding the stop sequences.

model: Model

The model that will complete your prompt.

See models for additional details and options.

Accepts one of the following:

:"claude-opus-4-5-20251101" | :"claude-opus-4-5" | :"claude-3-7-sonnet-latest" | 17 more

The model that will complete your prompt.

See models for additional details and options.

Accepts one of the following:

:"claude-opus-4-5-20251101"

Premium model combining maximum intelligence with practical performance

:"claude-opus-4-5"

Premium model combining maximum intelligence with practical performance

:"claude-3-7-sonnet-latest"

High-performance model with early extended thinking

:"claude-3-7-sonnet-20250219"

High-performance model with early extended thinking

:"claude-3-5-haiku-latest"

Fastest and most compact model for near-instant responsiveness

:"claude-3-5-haiku-20241022"

Our fastest model

:"claude-haiku-4-5"

Hybrid model, capable of near-instant responses and extended thinking

:"claude-haiku-4-5-20251001"

Hybrid model, capable of near-instant responses and extended thinking

:"claude-sonnet-4-20250514"

High-performance model with extended thinking

:"claude-sonnet-4-0"

High-performance model with extended thinking

:"claude-4-sonnet-20250514"

High-performance model with extended thinking

:"claude-sonnet-4-5"

Our best model for real-world agents and coding

:"claude-sonnet-4-5-20250929"

Our best model for real-world agents and coding

:"claude-opus-4-0"

Our most capable model

:"claude-opus-4-20250514"

Our most capable model

:"claude-4-opus-20250514"

Our most capable model

:"claude-opus-4-1-20250805"

Our most capable model

:"claude-3-opus-latest"

Excels at writing and complex tasks

:"claude-3-opus-20240229"

Excels at writing and complex tasks

:"claude-3-haiku-20240307"

Our previous most fast and cost-effective

String

stop_reason: String

The reason that we stopped.

This may be one the following values:

"stop_sequence": we reached a stop sequence — either provided by you via the stop_sequences parameter, or a stop sequence built into the model
"max_tokens": we exceeded max_tokens_to_sample or the model's maximum

type: :completion

Object type.

For Text Completions, this is always "completion".

Accepts one of the following:

:completion