{"id":20915468,"url":"https://github.com/jqueryscript/chatgpt-timeline","last_synced_at":"2026-07-09T16:31:35.031Z","repository":{"id":175283009,"uuid":"653633949","full_name":"jqueryscript/chatgpt-timeline","owner":"jqueryscript","description":"A timeline of ChatGPT: major events, milestones, controversies, etc.","archived":false,"fork":false,"pushed_at":"2026-06-27T01:16:36.000Z","size":32,"stargazers_count":6,"open_issues_count":0,"forks_count":0,"subscribers_count":1,"default_branch":"main","last_synced_at":"2026-06-27T03:10:02.394Z","etag":null,"topics":["chatbot","chatgpt","codex","gpt","gpt-5","openai"],"latest_commit_sha":null,"homepage":"https://www.scriptbyai.com/timeline-of-chatgpt/","language":null,"has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":null,"status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/jqueryscript.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":null,"code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null,"zenodo":null,"notice":null,"maintainers":null,"copyright":null,"agents":null,"dco":null,"cla":null}},"created_at":"2023-06-14T12:30:53.000Z","updated_at":"2026-06-27T01:16:39.000Z","dependencies_parsed_at":null,"dependency_job_id":"372ed6a4-3f56-456f-ab2e-c3c395da50c3","html_url":"https://github.com/jqueryscript/chatgpt-timeline","commit_stats":null,"previous_names":["jqueryscript/chatgpt-timeline"],"tags_count":0,"template":false,"template_full_name":null,"purl":"pkg:github/jqueryscript/chatgpt-timeline","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/jqueryscript%2Fchatgpt-timeline","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/jqueryscript%2Fchatgpt-timeline/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/jqueryscript%2Fchatgpt-timeline/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/jqueryscript%2Fchatgpt-timeline/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/jqueryscript","download_url":"https://codeload.github.com/jqueryscript/chatgpt-timeline/tar.gz/refs/heads/main","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/jqueryscript%2Fchatgpt-timeline/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":286080680,"owners_count":35306715,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2026-05-26T15:22:16.424Z","status":"online","status_checked_at":"2026-07-09T02:00:07.329Z","response_time":57,"last_error":null,"robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":true,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["chatbot","chatgpt","codex","gpt","gpt-5","openai"],"created_at":"2024-11-18T16:15:12.494Z","updated_at":"2026-07-09T16:31:35.018Z","avatar_url":"https://github.com/jqueryscript.png","language":null,"funding_links":[],"categories":[],"sub_categories":[],"readme":"# ChatGPT Timeline\n\nA public timeline of major OpenAI GPT model releases, ChatGPT product updates, and related OpenAI milestones.\n\nThis repository is built as a clean reference for ChatGPT and GPT release history. It covers GPT-1, GPT-2, GPT-3, ChatGPT, GPT-4, GPT-4o, OpenAI reasoning models, GPT-5, Codex, Sora, ChatGPT Images, GPT-5.5, and GPT-5.6.\n\n\u003e [Claude Timeline](https://github.com/jqueryscript/anthropic-claude-timeline)\n\nLast updated: June 27, 2026\n\n## What This Timeline Covers\n\n- GPT model release dates\n- ChatGPT product milestones\n- OpenAI reasoning model releases\n- Codex and coding-agent updates\n- Sora and video generation releases\n- ChatGPT Images and image generation updates\n- Major OpenAI API and developer platform milestones\n\n## Quick Release Table: Newest First\n\n| Model or Product | Release Date | Key Highlight |\n|---|---:|---|\n| GPT-5.6 Sol, Terra, and Luna | June 27, 2026 | Limited preview of the GPT-5.6 series, with Sol as the flagship model, Terra for balanced work, and Luna for fast lower-cost work. |\n| GPT-5.5 | April 23, 2026 | Frontier model for coding, research, computer use, documents, spreadsheets, and long-running work. |\n| ChatGPT Images 2.0 | April 21, 2026 | New ChatGPT image generation experience and model generation. |\n| GPT-5.4 mini and nano | March 17, 2026 | Smaller GPT-5.4 models for faster and lower-cost workloads. |\n| GPT-5.4 | March 5, 2026 | Frontier model for professional work across reasoning, coding, agents, and tool use. |\n| GPT-5.3-Codex-Spark | February 12, 2026 | Ultra-fast research preview model for real-time coding in Codex. |\n| GPT-5.3-Codex | February 5, 2026 | Agentic coding model for professional software and computer-based work. |\n| GPT-5.2-Codex | December 18, 2025 | Agentic coding model for complex software engineering and defensive cybersecurity. |\n| GPT Image 1.5 | December 16, 2025 | Improved ChatGPT Images model with faster generation and stronger editing. |\n| GPT-5.2 | December 11, 2025 | Frontier model series for professional knowledge work and long-running agents. |\n| GPT-5.1 | November 12, 2025 | ChatGPT update with GPT-5.1 Instant and GPT-5.1 Thinking. |\n| Sora 2 | September 30, 2025 | Video and audio generation model with stronger physics, realism, and control. |\n| GPT-5 | August 7, 2025 | Unified GPT-5 system for ChatGPT and developers. |\n| Codex | May 16, 2025 | Cloud-based software engineering agent. |\n| OpenAI o3 and o4-mini | April 16, 2025 | Reasoning models with tool use across ChatGPT. |\n| GPT-4.1 | April 14, 2025 | API model series for coding, instruction following, and long context. |\n| 4o image generation | March 25, 2025 | Native image generation in GPT-4o and ChatGPT. |\n| GPT-4.5 | February 27, 2025 | Research preview of a larger GPT model for chat. |\n| OpenAI o3-mini | January 31, 2025 | Cost-efficient reasoning model for STEM, coding, and math. |\n| OpenAI o1-preview | September 12, 2024 | First public reasoning model series from OpenAI. |\n| ChatGPT search | October 31, 2024 | Web search experience inside ChatGPT. |\n| Canvas | October 3, 2024 | Separate workspace for writing and coding with ChatGPT. |\n| GPT-4o | May 13, 2024 | Omni model for text, audio, vision, and real-time interaction. |\n| ChatGPT plugins | March 23, 2023 | Early tool system for ChatGPT, later deprecated. |\n| GPT-4 | March 14, 2023 | Large multimodal model with text and image input. |\n| ChatGPT Plus | February 1, 2023 | Paid ChatGPT subscription plan. |\n| ChatGPT | November 30, 2022 | Public research preview of ChatGPT. |\n| GPT-3 | May 28, 2020 | 175B-parameter language model for few-shot learning. |\n| GPT-2 | February 14, 2019 | Large unsupervised language model and staged release milestone. |\n| GPT-1 | June 11, 2018 | Early generative pre-training system for language understanding. |\n\n## Full Timeline\n\n| Date | Milestone |\n|---:|---|\n| June 2018 | OpenAI published the first GPT research system through work on generative pre-training for language understanding. |\n| February 2019 | GPT-2 was introduced as a larger unsupervised language model. OpenAI used a staged release process because of misuse concerns. |\n| May 2020 | GPT-3 was introduced as a 175B-parameter language model that showed strong few-shot learning. |\n| November 30, 2022 | ChatGPT launched as a public research preview. |\n| February 1, 2023 | ChatGPT Plus launched as a paid subscription plan. |\n| March 14, 2023 | GPT-4 launched as a multimodal model with text and image input. |\n| March 23, 2023 | ChatGPT plugins launched as an early way for ChatGPT to use tools and external services. |\n| July 2023 | GPT-4 API access became generally available to paying API customers. |\n| May 13, 2024 | GPT-4o launched as a faster omni model for text, audio, vision, and real-time interaction. |\n| September 12, 2024 | OpenAI introduced o1-preview, the first model in its reasoning series. |\n| October 3, 2024 | Canvas launched as a separate workspace for writing and coding with ChatGPT. |\n| October 31, 2024 | ChatGPT search launched for web answers with source links. |\n| January 31, 2025 | OpenAI o3-mini launched as a smaller reasoning model for STEM, math, and coding. |\n| February 27, 2025 | GPT-4.5 launched as a research preview of a larger GPT model for chat. |\n| March 25, 2025 | OpenAI introduced native image generation in GPT-4o. |\n| April 14, 2025 | GPT-4.1, GPT-4.1 mini, and GPT-4.1 nano launched in the API. |\n| April 16, 2025 | OpenAI o3 and o4-mini launched as reasoning models with access to ChatGPT tools. |\n| May 16, 2025 | Codex launched as OpenAI's cloud-based software engineering agent. |\n| August 7, 2025 | GPT-5 launched as a unified system in ChatGPT and the API. |\n| September 30, 2025 | Sora 2 launched as a video and audio generation model. |\n| November 12, 2025 | GPT-5.1 launched in ChatGPT as GPT-5.1 Instant and GPT-5.1 Thinking. |\n| November 13, 2025 | GPT-5.1 became available for developers in the API. |\n| December 11, 2025 | GPT-5.2 launched for professional knowledge work and long-running agents. |\n| December 16, 2025 | GPT Image 1.5 launched through the new ChatGPT Images experience. |\n| December 18, 2025 | GPT-5.2-Codex launched for agentic coding and cybersecurity-related software work. |\n| February 5, 2026 | GPT-5.3-Codex launched for long-running coding, research, and computer-based work. |\n| February 12, 2026 | GPT-5.3-Codex-Spark launched as an ultra-fast research preview for real-time coding. |\n| March 5, 2026 | GPT-5.4 launched in ChatGPT, the API, and Codex for professional work. |\n| March 17, 2026 | GPT-5.4 mini and GPT-5.4 nano launched for faster and lower-cost use cases. |\n| April 21, 2026 | ChatGPT Images 2.0 launched as a new image generation experience. |\n| April 23, 2026 | GPT-5.5 launched for advanced coding, research, computer use, knowledge work, and agentic workflows. |\n| April 24, 2026 | GPT-5.5 and GPT-5.5 Pro became available in the API. |\n| June 27, 2026 | OpenAI began a limited preview of the GPT-5.6 series: Sol, its flagship model; Terra, a balanced model for everyday work; and Luna, a fast and affordable model. Initial access is through the API and Codex for selected trusted partners. |\n\n## Latest OpenAI Model\n\nThe latest major GPT model in this timeline is GPT-5.6 Sol, introduced in limited preview on June 27, 2026.\n\nGPT-5.6 Sol is OpenAI's strongest model in the announcement. The GPT-5.6 series also includes Terra for balanced everyday work, with competitive performance to GPT-5.5 at half the cost, and Luna as the fast, lowest-cost model in the series. During the preview, GPT-5.6 models are available through the API and Codex to selected trusted partners, with broader ChatGPT, Codex, and API availability planned soon. OpenAI says the short-term limited preview follows engagement with the U.S. government.\n\nGPT-5.6 adds max reasoning effort for Sol and an ultra mode that can use subagents for complex work. OpenAI cites improved agentic capabilities in coding, biology, and cybersecurity, including Terminal-Bench 2.1, GeneBench v1, ExploitBench, and ExploitGym results. OpenAI says Sol did not cross the Cyber Critical threshold in the reported tests and that it used more than 700,000 A100-equivalent GPU hours for automated red teaming.\n\nAPI pricing is listed per 1 million tokens: Sol at $5 input and $30 output, Terra at $2.50 input and $15 output, and Luna at $1 input and $6 output. GPT-5.6 also adds explicit cache breakpoints, a 30-minute minimum cache life, cache writes billed at 1.25x the uncached input rate, and a 90% cached-input discount for cache reads. OpenAI also plans to launch GPT-5.6 Sol on Cerebras at up to 750 tokens per second in July for selected customers.\n\n## Source Article\n\nThis repository is maintained as a companion resource for the full article:\n\n[ChatGPT Timeline: GPT Release Dates From GPT-1 to GPT-5.6](https://www.scriptbyai.com/timeline-of-chatgpt/)\n\nThe article includes a readable web version of the timeline, more context on GPT model generations, and related AI resources.\n\n## Related Resources\n\n- [Anthropic Claude Timeline](https://www.scriptbyai.com/anthropic-claude-timeline/)\n- [AI LLM API Pricing](https://www.scriptbyai.com/gpt-gemini-claude-pricing/)\n- [ChatGPT Resources](https://www.scriptbyai.com/chatgpt/)\n\n## Disclaimer\n\nThis repository is an independent timeline resource. It is not affiliated with OpenAI.\n\n## License\n\nThis repository is available under the MIT License.\n\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fjqueryscript%2Fchatgpt-timeline","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fjqueryscript%2Fchatgpt-timeline","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fjqueryscript%2Fchatgpt-timeline/lists"}