OpenAI GPT-6.1 Terra is the Terra model of the GPT-6.1 generation: a fast, efficient model for visual reasoning, precise computer use, and clear, natural writing, with a 1,050,000-token context window and up to 128,000 tokens of output. Supports text and image input, web search, and reasoning effort (six levels from none to max, default medium; pick none for the fastest replies) / summary display options. Best for reading charts and screenshots, analyzing document and form images, and drafting and polishing articles, emails and reports; it costs less than GPT-6.1 Sol, GPT-6.1 Sol is the pick for complex coding or professional work, and GPT-6 Astra remains the choice for the hardest end-to-end work. If you need to search the web for information, please turn on the "Web Search" switch. Prompt example 1: (Upload a revenue trend chart, png) Read the main trends and anomalies in this chart, suggest likely causes, and write a short three-paragraph note for my manager. Prompt example 2: (Upload a photo of a meeting whiteboard, jpg) Turn the whiteboard notes into bulleted meeting minutes and mark the action items and owners. Prompt example 3: (Upload a photo of a receipt, jpg) Read the date, items, quantities and amounts into a table and check whether the total adds up. Prompt example 4: (Upload a screenshot of a web page, png) Point out usability problems in this sign-up form and suggest improvements with revised field labels. Prompt example 5: Write a warm, natural 300-word introduction to the autumn menu of a neighborhood coffee shop, ending with one line inviting readers to visit. Prompt example 6: Rewrite this stiff notice to be clear and polite: Due to system maintenance, service is suspended this Saturday from 8 a.m. to noon. We apologize for the inconvenience. Prompt example 7: (Upload a product manual, pdf) Turn it into a plain-language quick start guide for everyday users in three parts: unboxing, setup and routine care. Prompt example 8: (Upload two living room design plans, png) Compare the two layouts on traffic flow, daylight and storage, list the pros and cons of each, and recommend one. Prompt example 9: Write a sincere thank-you letter of about 250 words to a senior colleague who is retiring, recalling their mentoring of new hires and process improvements. Prompt example 10: (Upload a screenshot of a settings screen, png) I want to turn on printer sharing. Tell me where to click next on this screen and list the full steps. Maximum context window (input and output combined): about 1,050,000 tokens. Maximum total input per request (including history): 922,000 tokens. Maximum output per reply: about 128,000 tokens (model reasoning, if any, counts toward this limit). Maximum total upload size per request: 512MB (all files and message content combined). Accepted document formats: pdf, docx, xlsx, pptx, txt, csv (file content is provided to the model as extracted text). Accepted image formats: gif, jpeg, jpg, png, webp. Maximum number of images: 1500. Maximum size per image: 50MB. Maximum total image size per message: 384MB (text and history share the same request size limit; uploads close to the limit may still be rejected). Image dimensions: 200 to 8,000 pixels per side. Maximum image resolution: 36,000,000 pixels in total. Output content formats: Text/Image Pricing: Medium Fast Mode: uses 2x credits Continuous conversation: Supported AI can make mistakes. Please verify important information.