# GPT 6.1 Terra > Source: > Published: 2026-10-26 17:58:24+00:00 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. CompareTry in Playground 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.