Table of Contents
Table of Contents
2026
#| Date | Model/Product | Core features and breakthroughs (source: OpenAI API Changelog) |
|---|
| 2026-02-24 | gpt-5.3-codex | Released gpt-5.3-codex on the Responses API. |
| 2026-03-03 | gpt-5.3-chat-latest | Released gpt-5.3-chat-latest (Chat Completions + Responses API), pointing to the latest GPT‑5.3 Instant snapshot used in ChatGPT. |
| 2026-03-05 | gpt-5.4 / gpt-5.4-pro | Released gpt-5.4 (Chat Completions + Responses) and gpt-5.4-pro (Responses). Also shipped tool search, built-in computer use, a 1M-token context window, and native compaction for longer-running agent workflows. |
| 2026-03-17 | gpt-5.4-mini / gpt-5.4-nano | Released gpt-5.4-mini and gpt-5.4-nano (Chat Completions + Responses): mini supports tool search, built-in computer use, and compaction; nano supports compaction but not tool search or computer use. |
| Date | Model/Product | Core features and breakthroughs (source: ChatGPT Release Notes) |
|---|
| Mar 2026 (rollout) | GPT-5.4 Thinking (ChatGPT) | ChatGPT rollout of GPT‑5.4 Thinking (ChatGPT-side naming), positioned for reasoning/coding/agentic work. Note: ChatGPT naming and rollout timing may not exactly match API model slugs. |
| Mar 2026 (rollout) | GPT-5.4 mini (ChatGPT) | ChatGPT rollout; used as a fallback model in some plans/scenarios when GPT‑5.4 Thinking hits rate limits. |
2025
#| Date | Model/Product | Core features and breakthroughs |
|---|
| 2025-01-31 | o3-mini | Cost-efficient reasoning model optimized for coding/math/science; supports developer-style tooling. |
| 2025-02-27 | GPT-4.5 (research preview) | More natural chat and stronger instruction-following; lower hallucinations. |
| 2025-04-16 | OpenAI o3 / o4-mini | Reasoning models update: o3 for strongest reasoning; o4-mini for higher efficiency and limits. |
| 2025-05-14 | GPT-4.1 / GPT-4.1 mini | Coding-focused models shipped to ChatGPT; 4.1 mini replaces 4o mini in ChatGPT. |
| 2025-06-10 | OpenAI o3-pro | Longer-thinking variant for higher reliability; available in ChatGPT (Pro) and via API. |
| 2025-08-07 | GPT-5 | New flagship model rollout in ChatGPT; paid tiers can choose GPT-5 or GPT-5 Thinking (and Pro). |
| 2025-11-12 | GPT-5.1 | GPT-5 updated to 5.1 Instant/Thinking, plus stronger style/personalization controls. |
| 2025-12-11 | GPT-5.2 | GPT-5.2 (Instant/Thinking/Pro) release; knowledge cutoff updated (noted as Aug 2025). |
2024
#| Date | Model/Product | Core Features and Breakthroughs |
|---|
| 2024-02-15 | Sora (first reveal) | Text-to-video model announcement; positioned for up to ~60s video generation. |
| 2024-05-13 | GPT-4o (Omni) | Native multimodality flagship with low-latency real-time interaction. |
| 2024-07-18 | GPT-4o mini | Smaller, more cost-efficient model option. |
| 2024-09-12 | o1-preview / o1-mini | Start of the o1 reasoning series for harder math/coding/science tasks. |
2023
#| Date | Model/Product | Core Features and Breakthroughs |
|---|
| 2022-11-30 | ChatGPT (GPT-3.5) | Public research preview release. |
| 2023-03-14 | GPT-4 | Release; introduced image inputs (text outputs). |
| 2023-11-06 | GPT-4 Turbo | DevDay release; larger context window and newer knowledge cutoff. |
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