Completions

Create a Text Completion

client.Completions.New(ctx, params) (*Completion, error)

POST/v1/complete

ModelsExpand Collapse

type Completion struct{…}

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:

type Model string

The model that will complete your prompt.

See models for additional details and options.

Accepts one of the following:

const ModelClaudeOpus4_6 Model = "claude-opus-4-6"

Most intelligent model for building agents and coding

const ModelClaudeSonnet4_6 Model = "claude-sonnet-4-6"

Best combination of speed and intelligence

const ModelClaudeHaiku4_5 Model = "claude-haiku-4-5"

Fastest model with near-frontier intelligence

const ModelClaudeHaiku4_5_20251001 Model = "claude-haiku-4-5-20251001"

Fastest model with near-frontier intelligence

const ModelClaudeOpus4_5 Model = "claude-opus-4-5"

Premium model combining maximum intelligence with practical performance

const ModelClaudeOpus4_5_20251101 Model = "claude-opus-4-5-20251101"

Premium model combining maximum intelligence with practical performance

const ModelClaudeSonnet4_5 Model = "claude-sonnet-4-5"

High-performance model for agents and coding

const ModelClaudeSonnet4_5_20250929 Model = "claude-sonnet-4-5-20250929"

High-performance model for agents and coding

const ModelClaudeOpus4_1 Model = "claude-opus-4-1"

Exceptional model for specialized complex tasks

const ModelClaudeOpus4_1_20250805 Model = "claude-opus-4-1-20250805"

Exceptional model for specialized complex tasks

const ModelClaudeOpus4_0 Model = "claude-opus-4-0"

Powerful model for complex tasks

const ModelClaudeOpus4_20250514 Model = "claude-opus-4-20250514"

Powerful model for complex tasks

const ModelClaudeSonnet4_0 Model = "claude-sonnet-4-0"

High-performance model with extended thinking

const ModelClaudeSonnet4_20250514 Model = "claude-sonnet-4-20250514"

High-performance model with extended thinking

const ModelClaude_3_Haiku_20240307 Model = "claude-3-haiku-20240307"

Fast and cost-effective model

string

StopReason 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".

Completions

Create a Text Completion

client.Completions.New(ctx, params) (*Completion, error)

POST/v1/complete

ModelsExpand Collapse

type Completion struct{…}

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:

type Model string

The model that will complete your prompt.

See models for additional details and options.

Accepts one of the following:

const ModelClaudeOpus4_6 Model = "claude-opus-4-6"

Most intelligent model for building agents and coding

const ModelClaudeSonnet4_6 Model = "claude-sonnet-4-6"

Best combination of speed and intelligence

const ModelClaudeHaiku4_5 Model = "claude-haiku-4-5"

Fastest model with near-frontier intelligence

const ModelClaudeHaiku4_5_20251001 Model = "claude-haiku-4-5-20251001"

Fastest model with near-frontier intelligence

const ModelClaudeOpus4_5 Model = "claude-opus-4-5"

Premium model combining maximum intelligence with practical performance

const ModelClaudeOpus4_5_20251101 Model = "claude-opus-4-5-20251101"

Premium model combining maximum intelligence with practical performance

const ModelClaudeSonnet4_5 Model = "claude-sonnet-4-5"

High-performance model for agents and coding

const ModelClaudeSonnet4_5_20250929 Model = "claude-sonnet-4-5-20250929"

High-performance model for agents and coding

const ModelClaudeOpus4_1 Model = "claude-opus-4-1"

Exceptional model for specialized complex tasks

const ModelClaudeOpus4_1_20250805 Model = "claude-opus-4-1-20250805"

Exceptional model for specialized complex tasks

const ModelClaudeOpus4_0 Model = "claude-opus-4-0"

Powerful model for complex tasks

const ModelClaudeOpus4_20250514 Model = "claude-opus-4-20250514"

Powerful model for complex tasks

const ModelClaudeSonnet4_0 Model = "claude-sonnet-4-0"

High-performance model with extended thinking

const ModelClaudeSonnet4_20250514 Model = "claude-sonnet-4-20250514"

High-performance model with extended thinking

const ModelClaude_3_Haiku_20240307 Model = "claude-3-haiku-20240307"

Fast and cost-effective model

string

StopReason 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".