ChatGPT Available Models: All Supported Models, Version Differences, Capabilities Comparison, And Access Requirements

ChatGPT offers a range of large language models designed for diverse user needs, with each model and mode targeting different balances of speed, reasoning, tool compatibility, and subscription requirements. Model access is determined by plan level, workspace settings, and user preferences for legacy or reasoning capabilities.

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ChatGPT Supports Multiple Models, Including The Latest, Legacy, And Reasoning Variants.

The current ChatGPT lineup centers on the GPT-5.2 family, presented in selectable modes that allow users to prioritize speed, depth, or research-grade performance. Alongside GPT-5.2, users on paid tiers may access earlier GPT models and OpenAI’s specialized o-series reasoning models, each with its own toolset and context window.

Legacy models like GPT-4o, GPT-4.1, and GPT-4.5 are made available for paid users through the “Show additional models” setting or workspace-level enablement, ensuring backward compatibility and specialty use cases.

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ChatGPT Supported Model Lineup

Model Or Mode	Description	Typical Access
GPT-5.2 Instant	Fast, default mode	Free and all paid plans
GPT-5.2 Thinking	Deeper reasoning, large context	Free (capped), expanded on paid
GPT-5.2 Pro	Research-grade, tool-limited	Pro, Business, Enterprise, Edu
GPT-5 Thinking mini	Quick reasoning variant	Paid or workspace-enabled
GPT-4o	General-purpose legacy	Paid, under Legacy Models
GPT-4.1	Coding and precision tasks	Paid, additional/legacy
GPT-4.5	High-end legacy, restricted	Pro, Enterprise
OpenAI o3	Frontier reasoning, 200K context	Paid, tier-based access
OpenAI o4-mini	Fast reasoning, 200K context	Paid, often unlimited
OpenAI o3 pro	Enterprise-only reasoning	Enterprise

Model visibility may require settings changes or workspace admin enablement.

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Version Differences Reflect Speed, Reasoning Depth, And Tool Compatibility.

GPT-5.2 modes include Instant for quick responses, Thinking for complex multi-step reasoning, and Pro for the most consistent, high-quality outputs. Each mode is tuned for different user scenarios, with Pro designed for research-level quality and more restrictive tool support.

Legacy GPT-4 models remain popular for users needing familiar behavior, coding precision, or continuity for established workflows. The o-series models are engineered specifically for advanced reasoning, featuring extra-large context windows and high output limits for extended problem solving.

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ChatGPT Version And Mode Differences

Mode	Speed	Reasoning Depth	Tool Support	Output Focus
Instant	Fastest	Standard	Full	Everyday tasks
Thinking	Slower	Deepest	Full	Complex analysis
Pro	Slowest	Deepest	Partial	Research-grade
Legacy (4o/4.1/4.5)	Variable	Variable	Full	Coding, legacy, custom
o3/o4-mini	High	High	Reasoning	Structured, stepwise

Mode selection controls tradeoffs in output speed and complexity.

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Capabilities Vary By Model, Emphasizing Reasoning, Coding, Or Versatility.

GPT-5.2 models are designed for everyday work, creativity, and analysis, supporting the full suite of ChatGPT tools except where noted for Pro mode. GPT-4.1 is favored for coding and precise instruction-following, while GPT-4o and GPT-4.5 offer legacy performance profiles for users needing continuity or specialty features.

OpenAI’s o3 and o4-mini are distinct for their large context windows (200K tokens) and support for lengthy, structured outputs or complex reasoning chains. These models are best for users requiring step-by-step problem-solving or handling very large documents.

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ChatGPT Model Capability Comparison

Model	Best Use Cases	Context Window	Output Limit
GPT-5.2	General chat, writing, analysis	16K–196K	Standard
GPT-5.2 Thinking	Deep reasoning, analysis	Up to 196K	Standard
GPT-5.2 Pro	Research, reliability	128K+	Partial tool support
GPT-4.1	Coding, instruction	32K+	Standard
GPT-4o/4.5	Versatile, legacy	Variable	Standard
o3, o4-mini	Advanced reasoning	200K	Up to 100K tokens

Capabilities are tailored to plan, task, and context requirements.

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Access Requirements Are Determined By Plan And Workspace Administration.

Free users receive access to GPT-5.2 Instant and Thinking (with message caps), while paid tiers expand model choices, raise usage limits, and enable legacy and reasoning options. Plus and Pro plans unlock additional models and unlimited reasoning access for o4-mini, with Pro further expanding to GPT-5.2 Pro and GPT-4.5.

Business and Enterprise workspaces provide administrative controls to enable or restrict specific models, allowing organizations to standardize toolsets and manage cost or compliance. Some advanced models, such as OpenAI o3 pro, are exclusive to Enterprise.

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ChatGPT Model Access By Plan

Plan	Model Access Highlights
Free	GPT-5.2 Instant/Thinking (limited)
Plus	More Thinking, GPT-4o, GPT-4.1, o3/o4-mini
Pro	GPT-5.2 Pro, GPT-4.5, o3/o4-mini unlimited
Business	Admin-enabled access to all variants
Enterprise	Flexible, includes o3 pro

Subscription and admin controls determine available models and modes.

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ChatGPT Model Portfolio Offers Speed, Depth, And Specialty Options Tailored To User Needs.

ChatGPT’s evolving model lineup supports a wide range of user goals, from everyday chat to deep analysis and coding. Access is governed by plan and workspace settings, with legacy and reasoning models expanding the platform’s flexibility for advanced or large-scale tasks.

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