---
title: "GPT-5.6 Luna Knowledge Cutoff | Since.dev"
description: "GPT-5.6 Luna was trained on data up to February 16, 2026. Since then: 403 endings, 214,296 breaking changes in packages. See what it cannot know."
canonical_url: https://since.dev/since/gpt-5.6-luna
last_updated: 2026-11-14
---

# Since February 16, 2026: what GPT-5.6 Luna cannot know

GPT-5.6 Luna was trained on data up to February 16, 2026. Since then, 403 models, APIs and runtimes have reached their end date and packages have shipped 214,296 breaking changes. Code it writes from memory can still use any of them.

Knowledge cutoff February 16, 2026

The model ID is `gpt-5.6-luna`, from OpenAI, released July 9, 2026. The endings and the package changes below came after its training data ends, so they are not in what the model learned.

## Ended since February 16, 2026

403 models, APIs and runtimes have reached their end date since the cutoff. The newest of each:

### AI models

- [anthropic.claude-3-5-sonnet-20241022-v2:0 on Amazon Bedrock: retirement 2026-11-13 in ap-northeast-2, ap-south-1 and ap-southeast-1](https://since.dev/calendar/anthropic/anthropic.claude-3-5-sonnet-20241022-v2-0/bedrock.md) November 13, 2026
- [anthropic.claude-3-sonnet-20240229-v1:0 on Amazon Bedrock: retirement 2026-11-13 in 4 regions](https://since.dev/calendar/anthropic/anthropic.claude-3-sonnet-20240229-v1-0/bedrock.md) November 13, 2026
- [anthropic.claude-3-7-sonnet-20250219-v1:0 on Amazon Bedrock: retirement 2026-11-13 in ap-south-1 and eu-west-2](https://since.dev/calendar/anthropic/anthropic.claude-3-7-sonnet-20250219-v1-0/bedrock.md) November 13, 2026
- [anthropic.claude-3-5-sonnet-20240620-v1:0 on Amazon Bedrock: retirement 2026-11-13 in ap-northeast-2, ap-south-1 and ap-southeast-1](https://since.dev/calendar/anthropic/anthropic.claude-3-5-sonnet-20240620-v1-0/bedrock.md) November 13, 2026
- [gemini-embedding-2-preview on Gemini API: requests routed to gemini-embedding-2 from 2026-11-06](https://since.dev/calendar/google/gemini-embedding-2-preview/gemini.md) November 6, 2026, use gemini-embedding-2
- [zai-glm-5-2 on Mistral API: retirement 2026-10-31](https://since.dev/calendar/zai/zai-glm-5-2/mistral.md) October 31, 2026, use Z.ai GLM 5.3
- [gpt-4o-2024-05-13 on OpenAI API: retirement 2026-10-23](https://since.dev/calendar/openai/gpt-4o-2024-05-13.md) October 23, 2026, use gpt-5.6-sol
- [gpt-4.1-nano on OpenAI API: retirement 2026-10-23](https://since.dev/calendar/openai/gpt-4.1-nano.md) October 23, 2026, use gpt-5.6-luna
- [o3-mini-2025-01-31 on OpenAI API: retirement 2026-10-23](https://since.dev/calendar/openai/o3-mini-2025-01-31.md) October 23, 2026, use gpt-5.6-sol
- [o1 on OpenAI API: retirement 2026-10-23](https://since.dev/calendar/openai/o1.md) October 23, 2026, use gpt-5.6-sol
- [gpt-3.5-turbo on OpenAI API: retirement 2026-10-23](https://since.dev/calendar/openai/gpt-3.5-turbo.md) October 23, 2026, use gpt-5.6-terra
- [gpt-4-0613-completions on OpenAI API: retirement 2026-10-23](https://since.dev/calendar/openai/gpt-4-0613-completions.md) October 23, 2026, use gpt-5.6-sol

### APIs

- [GitHub REST API: 1 endpoint is removed](https://since.dev/calendar/github/api.github.com/get-repos-owner-repo-dependency-graph-sbom.md) November 13, 2026
- [Cloudflare API: 3 parameters are removed](https://since.dev/calendar/cloudflare.md) November 1, 2026
- [Existing evals is removed on 2026-10-31](https://since.dev/calendar/openai/api.openai.com/existing-evals.md) October 31, 2026
- [OpenAI API removes Videos API on 2026-09-24](https://since.dev/calendar/openai/api.openai.com/videos-api.md) September 24, 2026
- [GitHub REST API: 6 endpoints are removed](https://since.dev/calendar/github.md) August 28, 2026
- [OpenAI API removes Assistants API on 2026-08-26](https://since.dev/calendar/openai/api.openai.com/assistants-api.md) August 26, 2026, use Responses API and Conversations API
- [OpenAI API removes OpenAI-Beta: realtime=v1 on 2026-05-12](https://since.dev/calendar/openai/api.openai.com/openai-beta-realtime-v1) May 12, 2026, use Realtime API

### Runtimes and platforms

- [PostgreSQL 14: end of life 2026-11-12](https://since.dev/calendar/postgresql/14.md) November 12, 2026
- [Microsoft PowerShell 7.5: end of life 2026-11-10](https://since.dev/calendar/powershell/7.5.md) November 10, 2026
- [Microsoft .NET 8: end of life 2026-11-10](https://since.dev/calendar/dotnet/8.md) November 10, 2026
- [Microsoft PowerShell 7.4: end of life 2026-11-10](https://since.dev/calendar/powershell/7.4.md) November 10, 2026
- [Microsoft .NET 9: end of life 2026-11-10](https://since.dev/calendar/dotnet/9.md) November 10, 2026
- [Apache Airflow 3.3: end of life 2026-11-07](https://since.dev/calendar/apache-airflow/3.3.md) November 7, 2026
- [Ruby on Rails 8.0: end of life 2026-11-07](https://since.dev/calendar/rails/8.0.md) November 7, 2026
- [Liquibase Secure 4.30: end of life 2026-11-05](https://since.dev/calendar/liquibase-secure/4.30.md) November 5, 2026
- [Vitess 23: end of life 2026-11-04](https://since.dev/calendar/vitess/23.md) November 4, 2026
- [GitHub-hosted runner macos-14-xlarge: removed 2026-11-02](https://since.dev/calendar/github/github-runner-macos-14-xlarge.md) November 2, 2026
- [GitHub-hosted runner macos-14: removed 2026-11-02](https://since.dev/calendar/github/github-runner-macos-14.md) November 2, 2026
- [Wagtail 7.0: end of life 2026-11-02](https://since.dev/calendar/wagtail/7.0.md) November 2, 2026

And 372 more on [the calendar](https://since.dev/calendar.md).

## Still ahead

450 end dates are still ahead. Some were announced after the cutoff, so the model may write what they end. The soonest of each:

### AI models

- [codex-mini-2025-05-16 on Microsoft Foundry: retirement 2026-11-15](https://since.dev/calendar/openai/codex-mini-2025-05-16/azure.md) November 15, 2026
- [gemini-3.1-flash-live-preview on Gemini API: retirement no sooner than 2026-11-17](https://since.dev/calendar/google/gemini-3.1-flash-live-preview/gemini) November 17, 2026, use gemini-3.8-live
- [gpt-chat-latest-2026-05-05 on Microsoft Foundry: retirement 2026-11-17](https://since.dev/calendar/openai/gpt-chat-latest-2026-05-05/azure.md) November 17, 2026
- [gpt-chat-latest-2026-06-24 on Microsoft Foundry: retirement 2026-11-17](https://since.dev/calendar/openai/gpt-chat-latest-2026-06-24/azure.md) November 17, 2026
- [o3-deep-research-2025-06-26 on Microsoft Foundry: retirement 2026-11-19](https://since.dev/calendar/openai/o3-deep-research-2025-06-26/azure.md) November 19, 2026, use gpt-5.6-sol
- [o1-2024-12-17 on Microsoft Foundry: retirement 2026-11-19](https://since.dev/calendar/openai/o1-2024-12-17/azure.md) November 19, 2026, use gpt-5.6-sol
- [o4-mini-2025-04-16 on Microsoft Foundry: retirement 2026-11-19](https://since.dev/calendar/openai/o4-mini-2025-04-16/azure.md) November 19, 2026, use gpt-5.6-terra
- [Llama-4-Maverick-17B-128E-Instruct-FP8 on Microsoft Foundry: retirement 2026-11-19](https://since.dev/calendar/meta/llama-4-maverick-17b-128e-instruct-fp8/azure.md) November 19, 2026
- [o1-pro-2025-03-19 on Microsoft Foundry: retirement 2026-11-19](https://since.dev/calendar/openai/o1-pro-2025-03-19/azure.md) November 19, 2026, use gpt-5.6-sol
- [o3-pro-2025-06-10 on Microsoft Foundry: retirement 2026-11-19](https://since.dev/calendar/openai/o3-pro-2025-06-10/azure.md) November 19, 2026, use gpt-5.6-sol
- [gemini-3.6-flash on Vertex AI: retirement no sooner than 2026-11-19](https://since.dev/calendar/google/gemini-3.6-flash/vertex.md) November 19, 2026, use gemini-3.8-flash
- [o3-mini-2025-01-31 on Microsoft Foundry: retirement 2026-11-19](https://since.dev/calendar/openai/o3-mini-2025-01-31/azure.md) November 19, 2026, use gpt-5.6-terra

### APIs

- [Evals dashboard and API is removed on 2026-11-30](https://since.dev/calendar/openai/api.openai.com/evals-dashboard-and-api.md) November 30, 2026
- [Agent Builder is removed on 2026-11-30](https://since.dev/calendar/openai/api.openai.com/agent-builder.md) November 30, 2026, use Agents SDK or ChatGPT Workspace Agents
- [reusable prompt objects is removed on 2026-11-30](https://since.dev/calendar/openai/api.openai.com/reusable-prompt-objects.md) November 30, 2026
- [v1/prompts API is removed on 2026-11-30](https://since.dev/calendar/openai/api.openai.com/v1-prompts-api.md) November 30, 2026
- [Self-serve fine-tuning job creation is removed on 2027-01-06](https://since.dev/calendar/openai/api.openai.com/self-serve-fine-tuning-job-creation.md) January 6, 2027, use See the fine-tuning timeline.
- [OpenAI API removes /v1/audio/translations on 2027-02-26](https://since.dev/calendar/openai/api.openai.com/v1-audio-translations.md) February 26, 2027, use v1/realtime/translations

### Runtimes and platforms

- [DuckDB 1.4: end of life 2026-11-17](https://since.dev/calendar/duckdb/1.4.md) November 17, 2026
- [Angular 20: end of life 2026-11-28](https://since.dev/calendar/angular/20.md) November 28, 2026
- [Tarantool 3.3: end of life 2026-11-29](https://since.dev/calendar/tarantool/3.3.md) November 29, 2026
- [Ansible-core 2.19: end of life 2026-11-30](https://since.dev/calendar/ansible-core/2.19.md) November 30, 2026
- [Bellsoft Liberica JDK 8: end of life 2026-11-30](https://since.dev/calendar/bellsoft-liberica/8.md) November 30, 2026
- [Red Hat build of OpenJDK 8: end of life 2026-11-30](https://since.dev/calendar/redhat-build-of-openjdk/8.md) November 30, 2026
- [Redis 8.0: end of life 2026-12-01](https://since.dev/calendar/redis/8.0.md) December 1, 2026
- [Ember 6.8: end of life 2026-12-08](https://since.dev/calendar/emberjs/6.8.md) December 8, 2026
- [NumPy 2.2: end of life 2026-12-09](https://since.dev/calendar/numpy/2.2.md) December 9, 2026
- [Istio 1.30: end of life 2026-12-16](https://since.dev/calendar/istio/1.30.md) December 16, 2026
- [Spring Security 7.0: end of life 2026-12-31](https://since.dev/calendar/spring-security/7.0.md) December 31, 2026
- [MariaDB 13.0: end of life 2026-12-31](https://since.dev/calendar/mariadb/13.0.md) December 31, 2026

And 420 more on [the calendar](https://since.dev/calendar.md).

## Packages that changed most

Since the cutoff, package versions shipped 214,296 breaking changes, and 42,880 security advisories were published. The packages with the most breaking changes in versions released since:

- [happy-dom](https://since.dev/packages/npm/happy-dom.md) npm, 2,562 breaking changes, newest in 21.0.4 (October 20, 2026)
- [skit.flurlhttpclient.wechat.api](https://since.dev/packages/nuget/skit.flurlhttpclient.wechat.api.md) NuGet, 2,398 breaking changes, newest in 4.0.0 (November 13, 2026)
- [langfuse](https://since.dev/packages/pypi/langfuse.md) PyPI, 2,397 breaking changes, newest in 5.1.0 (October 30, 2026)
- [cloudflare](https://since.dev/packages/npm/cloudflare.md) npm, 2,014 breaking changes, newest in 7.0.0 (July 9, 2026)
- [@types/three](https://since.dev/packages/npm/@types/three.md) npm, 1,884 breaking changes, newest in 0.187.0 (October 30, 2026)
- [three](https://since.dev/packages/npm/three.md) npm, 1,884 breaking changes, newest in 0.187.0 (October 30, 2026)
- [@huggingface/transformers](https://since.dev/packages/npm/@huggingface/transformers.md) npm, 1,727 breaking changes, newest in 4.3.0 (September 16, 2026)
- [azure-search-documents](https://since.dev/packages/pypi/azure-search-documents.md) PyPI, 1,692 breaking changes, newest in 12.0.0 (May 1, 2026)
- [qcodes](https://since.dev/packages/pypi/qcodes.md) PyPI, 1,602 breaking changes, newest in 0.63.0 (November 12, 2026)
- [typescript](https://since.dev/packages/npm/typescript.md) npm, 1,586 breaking changes, newest in 7.0.2 (July 8, 2026)

## Check before it writes

Run `npx since-dev init` in a repository and your coding agent checks a version or a model ID before it writes one, whatever model it runs on. To see what a repository already uses that has ended, [scan it](https://since.dev/scan.md), or run `npx since-dev` inside it.

Knowledge cutoffs are from [models.dev](https://github.com/sst/models.dev) (MIT License). A cutoff given as a month is read as that month’s last day.

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