LLM Models

OpenAI's advanced text-to-image generation model with exceptional prompt adherence. Represents a major leap from DALL-E 2 in understanding complex and lengthy text prompts. Integrated with ChatGPT to automatically generate detailed, tailored prompts from simple user ideas. Produces high-quality images with improved handling of historically difficult elements like hands and text within images. Available in Standard and HD quality modes.

OpenAI's previous-generation flagship with vision capabilities and large context window. Represents a significant upgrade from base GPT-4 with 3x cheaper input pricing and 2x cheaper output pricing. Features 128K context window (equivalent to 300+ pages) and can generate up to 4,096 tokens per response. Strong performance on reasoning, math, and coding tasks with native vision support for analyzing images.

OpenAI's cheapest and fastest model in the GPT-4.1 family (April 2025), built for high-volume classification, extraction, and autocomplete where sophisticated reasoning isn't needed. Retains the 1M-token context window at the lowest price in the lineup.

The mid-tier model of OpenAI's GPT-4.1 family (April 2025), matching or beating GPT-4o on many benchmarks at roughly 5x lower cost, with the same 1M-token context window. A strong default for latency- and cost-sensitive production workloads.

OpenAI's April 2025 workhorse API model, a major step up over GPT-4o on coding, instruction following, and long-context comprehension, with a 1M-token context window. GPT-4.1 is ~26% cheaper than GPT-4o for median queries and is offered alongside smaller mini and nano tiers.

OpenAI's versatile flagship model with multimodal capabilities. Accepts text and image inputs, produces text outputs. The 'o' stands for 'omni', reflecting its ability to handle multiple input types seamlessly. Features a massive 128K context window and strong performance across reasoning, coding, and creative tasks. Best model for most use cases requiring balanced performance and cost.

OpenAI's first reasoning-focused model that uses extended chain-of-thought processing to tackle complex problems. Spends more time thinking before responding, breaking down problems systematically. Achieves exceptional performance on PhD-level science questions (GPQA) and competitive programming (Codeforces 89th percentile). Best for tasks requiring deep reasoning: mathematics, scientific analysis, coding challenges, and multi-step problem decomposition.

OpenAI's flagship model optimized for coding and agentic workflows with adaptive reasoning. Two variants (Instant and Thinking) balance speed and thoroughness. Instant tier features breakthrough adaptive reasoning that automatically decides when to think deeply versus respond quickly. Thinking tier provides persistent reasoning for complex multi-step problems. Strong improvements on math and coding benchmarks including AIME 2025 and Codeforces.

OpenAI's late-2025 flagship (December 2025) with a massive 400K context window and enhanced reasoning capabilities, now superseded by the GPT-5.4 and GPT-5.5 generation (April 2026). Available in three tiers (Instant, Thinking, Pro) for different use cases. First model to exceed 90% on ARC-AGI benchmark, representing a significant leap in general intelligence. Excels at complex reasoning, coding, and agentic workflows with hybrid reasoning that balances speed and depth.

OpenAI's state-of-the-art image generation model, producing high-fidelity images with strong prompt adherence and text rendering. Successor to GPT Image 1, available through the API.

DISCONTINUED. Sora 2 was OpenAI's video and audio generation model, producing realistic video with synchronized audio from text and image prompts. OpenAI announced (2026-03-24) it was discontinuing the Sora product: the web and app experiences shut down on April 26, 2026, and the API is scheduled to shut down on September 24, 2026.

OpenAI's strongest mini model yet (April 2026) for coding, computer use, and subagents. A low-cost, high-throughput option with a 400K-token context window and multimodal (text + vision) input.