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GPT-5.3 Chat points to the GPT-5.3 Instant snapshot currently used in ChatGPT. We recommend GPT-5.2 for API usage, but feel free to use this GPT-5.3 Chat model to test our latest improvements for chat use cases.
inputTokensPrice:1.750 outputTokensPrice:14.000
GPT‑5.3‑Codex is OpenAI’s most capable agentic coding model, designed to handle not just code generation but longer, end‑to‑end work on a computer. It combines the frontier coding strength of GPT‑5.2‑Codex with the reasoning and professional knowledge capabilities of GPT‑5.2, and is engineered to run faster (about 25% faster in Codex). It’s built for long‑running, multi‑step tasks that can include research, tool use, debugging, and complex execution, while staying interactive—so you can steer it, ask questions, and refine direction as it works without losing context. In evaluations, it sets new highs on software engineering and agentic benchmarks (including SWE‑Bench Pro and Terminal‑Bench 2.0) and shows strong results on OSWorld‑Verified and GDPval. It’s also deployed with strengthened cybersecurity safeguards and is trained to help identify software vulnerabilities.
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GPT-5.4 Pro is OpenAI's most advanced model, building on GPT-5.4's unified architecture with enhanced reasoning capabilities for complex, high-stakes tasks. It features a 1M+ token context window (922K input, 128K output) with support for text and image inputs. Optimized for step-by-step reasoning, instruction following, and accuracy, GPT-5.4 Pro excels at agentic coding, long-context workflows, and multi-step problem solving.
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GPT‑5.4, released March 5, 2026, is OpenAI’s newest frontier model aimed at complex professional work. It’s available in the API as gpt-5.4 and in ChatGPT as GPT‑5.4 Thinking, with a higher-end GPT‑5.4 Pro tier for maximum performance. It supports adjustable deliberation through reasoning.effort, letting developers trade latency/cost for deeper reasoning. The model accepts text and image inputs and produces text output, with a 1,050,000‑token context window and up to 128,000 output tokens; its published knowledge cutoff is Aug 31, 2025. OpenAI also published a system card describing new cybersecurity-focused mitigations for the Thinking variant.
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GPT-5.2 is the newest frontier-grade model in the GPT-5 family, outperforming GPT-5.1 in agentic capabilities and long-context handling. It uses adaptive reasoning to dynamically allocate compute—responding quickly to straightforward questions while applying deeper analysis to more complex tasks. Designed for broad task coverage, GPT-5.2 delivers consistent improvements across math, coding, science, and tool-calling workloads, producing more coherent long-form responses and more reliable tool use.
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GPT-5.2-Codex is an upgraded version of GPT-5.2 optimized for agentic coding tasks in Codex or similar environments. GPT-5.2-Codex supports low, medium, high, and xhigh reasoning effort settings.
inputTokensPrice:1.750 outputTokensPrice:14.000
GPT-5.2 Chat (AKA Instant) is the fast, lightweight member of the 5.2 family, optimized for low-latency chat while retaining strong general intelligence. It uses adaptive reasoning to selectively “think” on harder queries, improving accuracy on math, coding, and multi-step tasks without slowing down typical conversations. The model is warmer and more conversational by default, with better instruction following and more stable short-form reasoning. GPT-5.2 Chat is designed for high-throughput, interactive workloads where responsiveness and consistency matter more than deep deliberation.