A fast, efficient model for visual reasoning, precise computer use, and clear, natural writing.
A fast, efficient model for visual reasoning, precise computer use, and clear, natural writing.
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Reasoning
Highest
Speed
Fast
Price
$1•$5
Input•Output
Input
Text, Image
Output
Text
Use GPT-6.1 Terra to match product photos to catalog entries, interpret technical drawings, act on application screens, or draft and revise text.
reasoning.effort supports none, low, medium (default), high, xhigh, and max.
Tool calling requires the Responses API.
See the GPT-6 guide
for prompting and migration guidance. 1,050,000 context window
128,000 max output tokens
Jun 01, 2026 knowledge cutoff
Reasoning token support
Pricing
Pricing is based on the number of tokens used, or other metrics based on the model type. 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
Input
$1.00
Cached input
$0.05
Cache writes
$1.25
Output
$5.00
Cached input tokens are priced at 5% of the uncached input token rate.
Cache-write prices shown use 30-minute retention. Standard cache writes cost $1.25 per million tokens for 30-minute retention and $2.50 for 12-hour retention, before long-context adjustments.
Prompts with more than 272K input tokens are priced at 2x input and cache rates and 1.5x output for the full request.
Batch and Flex prices are 50% lower than Standard.
Regional processing adds a 10% premium where available.
Fast mode prices are 2x Standard.
Modalities
Text
Input and output
Image
Input only
Audio
Not supported
Video
Not supported
Endpoints
Live
v1/live/sessions
Chat Completions
v1/chat/completions
Responses
v1/responses
Realtime
v1/realtime
Realtime translation
v1/realtime/translations
Realtime transcription
v1/realtime/transcription_sessions
Assistants
v1/assistants
Batch
v1/batch
Fine-tuning
v1/fine-tuning
Embeddings
v1/embeddings
Image generation
v1/images/generations
Videos
v1/videos
Image edit
v1/images/edits
Speech generation
v1/audio/speech
Transcription
v1/audio/transcriptions
Translation
v1/audio/translations
Moderation
v1/moderations
Completions (legacy) v1/completions
Features
Streaming
Supported
Function calling Supported
Structured outputs
Supported
Fine-tuning
Not supported
Tools
Tools supported by this model when using the Responses API.
Web search
Supported
File search
Supported
Image generation
Supported
Code interpreter
Supported
Hosted shell
Supported
Apply patch
Supported
Skills
Supported
Computer use
Supported
MCP
Supported
Tool search
Supported
Snapshots
gpt-6.1-terra Rate limits
Rate limits ensure fair and reliable access to the API by placing specific caps on requests, tokens, audio duration, or other usage within a given time period. Your usage tier determines how high these limits are set and automatically increases as you send more requests and spend more on the API.