GPT 6.1 Terra

Default
Fast, efficient model for visual reasoning, precise computer use, and clear, natural writing. Tool calling uses the Responses API.
Fast, efficient model for visual reasoning, precise computer use, and clear, natural writing. Tool calling uses the Responses API.

GPT 6.1 Terra is an AI model from OpenAI, available on ZeroTwo. It costs $1.00 per million input tokens and $5.00 per million output tokens, has a 1,050,000-token context window, can return up to 128,000 output tokens, and has a knowledge cutoff of June 1, 2026.

Price
$1.00 • $5.00
Input • Output
Input
Text, Image
Output
Text

Fast, efficient model for visual reasoning, precise computer use, and clear, natural writing. Tool calling uses the Responses API.

1,050,000 context window
128,000 max output tokens
June 1, 2026 knowledge cutoff
Reasoning token support
Pricing
Pricing is based on the number of tokens used. For tool-specific models, like search and computer use, there's a fee per tool call. See details in the pricing page.
Text tokens
Per 1M tokens
∙
Batch API price
Input
$1.00
Cached input
$0.05
Output
$5.00
Quick comparison
Input
Cached input
Output
GPT 6.1 Terra
$1.00
Modalities
Text
Input and output
Image
Input only
Audio
Not supported
Endpoints
Chat Completions
v1/chat/completions
Responses
v1/responses
Batch
v1/batch
Realtime
v1/realtime
Assistants
v1/assistants
Fine-tuning
v1/fine-tuning
Embeddings
v1/embeddings
Image Generation
v1/images/generations
Image Edit
v1/images/edits
Speech Generation
v1/audio/speech
Transcription
v1/audio/transcriptions
Translation
v1/translations
Moderation
v1/moderations
Completions (legacy)
v1/completions
Features
Streaming
Supported
Function calling
Supported
Structured outputs
Supported
Fine-tuning
Not supported
Distillation
Not supported
Fast response
Not supported
Cost efficient
Not supported
Snapshots
Snapshots let you lock in a specific version of the model so that performance and behavior remain consistent. Below is a list of all available snapshots and aliases for GPT 6.1 Terra.
gpt-6.1-terra

Questions

How much does GPT 6.1 Terra cost?

GPT 6.1 Terra is priced at $1.00 per million input tokens and $5.00 per million output tokens, with cached input at $0.05 per million. On ZeroTwo it is included in your plan's credits rather than billed per token.

What is GPT 6.1 Terra's context window?

GPT 6.1 Terra accepts up to 1,050,000 tokens of context and can return up to 128,000 output tokens.

What is GPT 6.1 Terra's knowledge cutoff date?

GPT 6.1 Terra has a training knowledge cutoff of June 1, 2026. For anything later than that, use a model with web search enabled.

Can I use GPT 6.1 Terra for free?

You can try GPT 6.1 Terra on ZeroTwo's free plan, which includes a monthly credit allowance across every model in the catalogue. Heavier use moves to a paid plan rather than a per-token bill.